Opinions and documents
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4 UNITED STATES DISTRICT COURT
5 NORTHERN DISTRICT OF CALIFORNIA
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7 CAPRI MOBILE VILLA LLC, Case No. 25-cv-09096-JSC
8 Plaintiff,
ORDER RE: DEFENDANT’S MOTION
9 v. TO DISMISS
10 CITY OF PETALUMA, Re: Dkt. No. 20
Defendant.
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13 Plaintiff Capri Mobile Village LLC, a mobilehome park owner in Petaluma, California,
14 challenges Petaluma’s mobilehome rent control ordinance under the Fifth Amendment’s Takings
15 Clause and the Fourteenth Amendment’s Due Process Clause. (Dkt. No. 18.)1 The ordinance
16 prevents mobilehome park owners from raising rents over certain limits, and a 2025 ordinance
17 amendment prevents park owners from resetting rent to market value when a homeowner sells the
18 mobilehome. Plaintiff asserts the 2025 amendment is an unconstitutional taking on its face and as
19 applied, and violates Plaintiff’s substantive due process rights. Defendant moves to dismiss all
20 claims. After carefully considering the parties’ submissions, and having had the benefit of oral
21 argument on May 21, 2026, the Court GRANTS Defendant’s motion to dismiss as to all claims.
22 Drawing inferences from the Amended Complaint’s allegations in Plaintiff’s favor, Plaintiff has
23 not alleged facts sufficient to support an inference its as-applied takings challenge is ripe, or an
24 inference Petaluma’s rent control ordinance is a per se taking, a regulatory taking, or a violation of
25 Plaintiff’s substantive due process rights.
26 BACKGROUND
27
1 A. The City’s Rent Control Provision
2 In 1994, Petaluma enacted the “Mobilehome Park Space Rent Stabilization Program.”
3 Petaluma, Cal. Municipal Code Ch. 6.50.010 (“the ordinance”). The year before the city council
4 had retained a consultant to conduct a survey of mobilehome park residents. Id. Ch. 6.50.010(D).
5 The ordinance adopted findings from the survey, including how nearly 80% of residents are at
6 least 62 years old and rely on fixed incomes, roughly 90% are low income, and over half spend
7 more than 30% of their income on housing. Id. Ch. 6.50.010(E). The council also found “there is
8 a shortage of spaces for the locations of mobilehomes in the city, a condition which results in low
9 vacancy rates and tends to prevent normal competition between the owners and tenants of
10 mobilehome parks.” Id. Ch. 6.50.010(M). The city council therefore recognized “a need to …
11 provide protection to tenants from unreasonable rent increases” and “alleviat[e] the unequal
12 bargaining power which exists between” residents and park owners, while simultaneously
13 allowing “park owners to obtain a fair and reasonable rate of return and … to generate income”
14 from rent. Id. Ch. 6.50.010(F), (X).
15 The ordinance’s primary solution was to cap rent increases, i.e., rent control. Unless an
16 exception applies, a mobilehome park owner “shall not” increase a tenant’s rent within one year of
17 the most recent rent increase, and any rent increase “may not exceed” the lesser of 4%, or 70% of
18 the percent change in the Consumer Price Index (CPI).2 Id. Ch. 6.50.040(A). “If the change in the
19 CPI is negative, no rent increase is permitted.” Id. An owner may raise rent in excess of those
20 limits by either (1) resetting the base rent price to market value pursuant to the “vacancy control”
21 provision or (2) raising rents pursuant to owners’ right to a “fair return.”
22 B. The 2025 Vacancy Control Amendment
23 As relevant here, the primary rent-control exception is a so-called “vacancy control”
24 provision. “A mobilehome park owner shall be permitted to charge a new base rent for a
25 mobilehome space whenever a lawful space vacancy occurs.” Id. Ch. 6.50.220(A). As originally
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2 The consumer price index measures inflation. “‘Consumer price index’ or ‘CPI’ means the
1 enacted, the ordinance defined a “lawful space vacancy” to include “the termination of the tenancy
2 of the affected mobilehome tenant in accordance with […] California Civil Code Sections 798.55
3 through 798.60[.]” (Dkt. No. 16-2 at 33 (citing the version of Ch. 6.50.220(A)(1) effective August
4 13, 2025).) Those California Civil Code sections provide a tenancy can be terminated when a
5 tenant is evicted for just cause or the mobilehome owner sells the home. See generally Cal. Civ.
6 Code §§ 798.55-798.60. So, in either scenario, as originally enacted, the vacancy control
7 provision allowed park owners to reset rent for a space to market value, i.e., the price the owner
8 would charge in the absence of rent control.
9 But in 2025 the City amended the definition of “lawful space vacancy.” The vacancy
10 control now reads, in relevant part:
11 For purposes of this chapter, a lawful space vacancy is defined as
follows:
12
1. A vacancy occurring because of the termination of the
13 tenancy of the affected mobilehome tenant in accordance with
the Mobilehome Residency Law pursuant to Civil Code
14 Section 798.56. Notice given by a tenant to the manager or
owner of a mobilehome park sixty days prior to vacating a
15 tenancy pursuant to Civil Code Section 798.59 does not
create a lawful vacancy permitting the charging of a new
16 base rent pursuant to this section.
17 Petaluma, Cal. Municipal Code Ch. 6.50.220(A)(1) (emphasis added). Under the amended
18 vacancy control provision, a park owner may reset rents to market value when a tenant is evicted
19 for just cause, but may no longer do so when the mobilehome owner sells the home pursuant to
20 Section 798.59. Id.; see Cal. Civ. Code §§ 798.56, 798.59.
21 C. Park Owners’ Right to a Fair Return
22 A park owner may also increase rent above the ordinance’s limits to receive a “fair return”
23 on their investments. Id. Ch. 6.50.040(E); Ch. 6.50.060. If the owner believes they are not getting
24 a “fair return,” the owner may file a petition with the City, which begins an arbitration process. Id.
25 “Upon receipt” of the petition, the city “shall, within seven working days, assign an arbitrator” and
26 “set a date for … hearing” between 14 and 60 days after the arbitrator is assigned. Id. Ch.
27 6.50.060(E).
1 preponderance of the evidence the reasonable necessity of any rent increase” beyond the
2 ordinance’s caps “to earn a reasonable return.” Id. Ch. 6.50.060(G)(1). There is a rebuttable
3 presumption “the net operating income received by the owner” provides “a fair return.” Id.
4 Ch.60.050.100(A). In the arbitration, the parties “may present evidence regarding the
5 presumption,” i.e., evidence about the park owner’s “net operating income” and whether that
6 amount is “fair.” Id. Ch. 6.050.100(C). For instance, the parties may offer and cross-examine
7 witnesses, experts, and documentary evidence about a park owner’s “exceptional expenses” for
8 “maintenance and repairs,” whether the owner’s “expenses were unreasonably high or low
9 notwithstanding the application of prudent business practices,” and any “uncollected rents … and
10 bad debts” which are “beyond the control of the owner.” Id. Ch. 6.50.060(G)(3); Ch. 6.50.100(B),
11 (C). The arbitrator must submit a “written statement of decision” “within fourteen days of the
12 hearing.” Id. Ch. 6.50.060(G)(4).
13 D. Plaintiff’s Allegations
14 “At a mobilehome park, the park owner owns the land on which mobilehomes are placed.
15 In most cases, the […] residents own the mobilehome and rent the underlying […] space on which
16 the home is placed.” (Dkt. No. 18 ¶ 12.) A mobile home “is not installed on a permanent
17 foundation. Though movable, when a homeowner decides to move out of a park, he typically will
18 sell the home ‘in-place’ at the park to a new homeowner, who then becomes the lessor of the
19 underlying space.” (Id. ¶ 13.)
20 Plaintiff “is a limited liability company that owns” property in the “City of Petaluma,
21 where it operates a mobilehome park.” (Id. ¶ 4.) The “park has 69 spaces or pads, with
22 mobilehomes on all of them. Each home is owned by the resident or residents that live there.
23 Each homeowner rents or leases, from [Plaintiff], the space on which the home sits.” (Id. ¶ 19.)
24 To contextualize its claims, Plaintiff alleges details about mobilehome markets. Like
25 homes and cars, every “mobilehome has a fair market value.” (Id. ¶ 17.) “The vast majority” of
26 mobilehomes are “sold in-place in a park,” and when those sales occur, “the mobilehome’s market
27 value is at least partly a function of the rent paid for the underlying space. All things being equal,
1 Petaluma’s “artificially suppresses the rent charged for a space,” thereby raising mobilehome sale
2 prices and benefiting mobilehome owners. (Id. ¶ 18.) Plaintiff alleges “almost 90% of a mobile
3 home’s sale price represents the value of the lower rents set by the rent-control law,” and at its
4 park, mobilehomes “with an inherent value of roughly $5,000 to $25,000[] are selling for roughly
5 $150,000 to $225,000.” (Id. ¶¶ 26, 44.) As alleged, this windfall to homeowners comes at the
6 expense of park owners’ rental income because “space rents are roughly 40% of their fair market
7 value” “due to the City’s onerous rent-control law.” (Id. ¶ 25.)
8 Plaintiff challenges the 2025 vacancy control amendment, asserting it “undermines
9 investment-backed expectations, as it was enacted after Capri acquired the park and flies in the
10 face of the expectations of both Capri and residents that rents can be reset to market following a
11 lawful vacancy.” (Id. ¶ 45.) Now, as amended, the ordinance means “parks like Capri can now
12 almost never reset space rents to market levels. For the vast majority of spaces, Capri will never
13 be able to raise rents to market.” (Id. ¶ 23.) Effectively, the ordinance
14 compels a wealth transfer from park owners to a select group of
“windfall residents” who held space-tenants at the time of the
15 Ordinance’s enactment. The transfer is of the Premium, defined as the
net present value of the expected savings associated with the future
16 legally constrained space rent obligations to the park. Specifically, the
Ordinance requires a landowner to relinquish an ascertainable amount
17 of money (the Premium) linked to a specific, identifiably property
interest (the leasehold governing the leased space) and to transfer it to
18 a third party (the mobilehome owner), which Premium the third party
realizes upon the sale of his home. [… T]he Premium is defined and
19 measured by what the owner would be willing to pay for the leasehold
in a competitive, unregulated, and arms-length transaction.
20
21 (Id. ¶ 36.) So, the ordinance “benefits only those who were residents at the time of the
22 [ordinance’s] enactment and who then sell their homes for inflated prices.” (Id. ¶ 28.)
23 Plaintiff brings two causes of action. First, Plaintiff contends the vacancy control
24 amendment violates the Fifth Amendment’s Takings Clause, which reads “… nor shall private
25 property be taken for public use, without just compensation.” U.S. Const. Amend. V. Plaintiff
26 asserts the ordinance amendment is a per se taking and a regulatory taking, and is therefore
27 unconstitutional because the taking is not for “public use” and/or the government does not provide
1 Fourteenth Amendment. Both causes of action are brought under 42 U.S.C. section 1983, and
2 Plaintiff purports to challenge the ordinance amendment on its face and as applied in each cause of
3 action.
4 DISCUSSION
5 Defendant moves to dismiss all of Plaintiff’s claims. First, Plaintiff has not plausibly
6 alleged the amendment is a per se taking or a regulatory taking , and the as-applied takings claim
7 is not ripe.3 Second, the Substantive Due Process claim fails because the ordinance survives
8 rational basis review.
9 I. Plaintiff’s Facial Takings Challenge
10 As relevant here, there are two types of takings. The first is a per se taking, often referred
11 to as a “physical” or “categorical” taking, when “the government acquires private property for a
12 public purpose, whether the acquisition is the result of a condemnation proceeding or a physical
13 appropriation.” Brown v Legal Found. of Wash., 538 U.S. 216, 233 (2003) (cleaned up). The
14 second type is a “regulatory taking,” which requires “essentially ad hoc, factual inquiries.” Id. at
15 234 (cleaned up). Brown summarizes case law illustrating the difference between per se and
16 regulatory takings:
17 When the government physically takes possession of an interest in
property for some public purpose, it has a categorical duty to
18 compensate the former owner, regardless of whether the interest that
is taken constitutes an entire parcel or merely a part thereof. Thus,
19 compensation is mandated when a leasehold is taken and the
government occupies the property for its own purposes, even though
20 that use is temporary. Similarly, when the government appropriates
part of a rooftop in order to provide cable TV access for apartment
21 tenants, or when its planes use private airspace to approach a
government airport, it is required to pay for that share no matter how
22 small. But a government regulation that merely prohibits landlords
from evicting tenants unwilling to pay a higher rent, that bans certain
23 private uses of a portion of an owner's property, or that forbids the
private use of certain airspace, does not constitute a categorical
24 taking. The first category of cases requires courts to apply a clear rule;
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3 Under the Fifth Amendment, the government may not take private property for “public use” and
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without “just compensation.” U.S. Const. Amend. V. The parties dispute whether Plaintiff has
plausibly alleged a “private taking,” i.e., whether Plaintiff has alleged the government has
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committed a taking for “public use. (Dkt. No. 18 at 10-11; Dkt. No. 11 at 11-12.) Because
the second necessarily entails complex factual assessments of the
1 purposes and economic effects of government actions.
2 Id. at 233-34 (internal citations and quotation marks omitted).
3 As explained below, drawing inferences in Plaintiff’s favor, Plaintiff has not alleged facts
4 plausibly supporting an inference the ordinance is either a per se taking or a regulatory taking.
5 A. Per Se Taking
6 To argue the vacancy control amendment is a per se taking, Plaintiff relies on two cases.
7 Both are inapposite. First, Cedar Point Nursey v. Hassid, 594 U.S. 139 (2021) held it constitutes a
8 “per se physical taking” for a California law to require certain employers to allow union
9 organizers onto the employer’s premises because the law is a “government-authorized invasion[]
10 of property … allowing union organizers to traverse [the property] at will.” Id. at 141, 149, 152.
11 Plaintiff does not assert the ordinance causes a physical invasion of their property, which is the
12 only per se taking theory Cedar Point addresses. (See generally Dkt. Nos. 18, 25.) Plaintiff says
13 Cedar Point stands “for the uncontroversial proposition … that a taking can occur even if ‘the
14 property at issue does not first pass through the government’s hands.’” (Dkt. No. 25 at 10
15 (quoting Dkt. No. 18 ¶ 10).) True, a per se taking does not require the government to own the
16 property, but that portion of Cedar Point cannot reasonably be interpreted to apply to anything but
17 a physical-invasion-of-property taking theory. So, Cedar Point is unhelpful to Plaintiff.
18 Second, in Koontz v. St. Johns River Water Mgmt. Dist., 570 U.S. 595 (2013), the plaintiff
19 sought to obtain a land-use permit to undertake construction on his property. Id. at 600. The local
20 agency with jurisdiction over the plaintiff’s land had a regulation requiring “permit applicants
21 wishing to build on wetlands offset the resulting environmental damage by creating, enhancing, or
22 preserving wetlands elsewhere.” Id. at 600–01. Consistent with that regulation, when the plaintiff
23 applied for a permit, the agency conditioned its approval on the plaintiff agreeing to one of two
24 things. First, the plaintiff could “reduce the size of his development” and “deed to the [agency] a
25 conservation easement” on his property. Id. at 601–02. Alternatively, the plaintiff could “proceed
26 with the development as proposed” and “hire contractors make improvements to” agency-owned
27 land not on the plaintiff’s property. Id. at 602. The Supreme Court held the government’s
1 government command[ed] the relinquishment of funds linked to a specific, identifiable property
2 interest such as a bank account or parcel of property.” Id. at 614. In other words, both conditions
3 “would transfer an interest in property from the landowner to the government.” Id. at 615.
4 Citing Koontz, Plaintiff asserts the vacancy control amendment is a per se taking because it
5 “compels a wealth transfer from park owners” to residents who lived in mobile parks “at the time
6 of the [amendment]’s enactment.” (Dkt. No. 18 ¶ 36.) As the argument goes, the “wealth”
7 purportedly being “transfer[red]” is a “Premium, defined as the net present value of the expected
8 savings associated with the future legally constrained space rent obligations to the park.” (Id.)
9 Simply put, Plaintiff alleges a reduction in “expected,” “future” rent earnings because, absent the
10 ordinance, park owners would charge higher rents. (See id.)
11 Drawing inferences in Plaintiff’s favor, Plaintiff does not allege facts sufficient to support
12 an inference the vacancy control amendment “transfer[s] an interest in property from the
13 landowner to the government,” thereby making the ordinance a per se taking. Koontz, 570 U.S. at
14 616. Plaintiff does not allege the amendment requires “the relinquishment of funds” in a “bank
15 account,” nor do those funds go “to the government.” Id. at 615–16. Rather, Plaintiff alleges the
16 ordinance reduces their “future,” “expected” earnings from rent, which comes from tenants. (Dkt.
17 No. 18 ¶ 36.) Plaintiff’s allegations of a “wealth transfer” are thus conclusory; “wealth” does not
18 include the “present value” of future, unearned, un-promised money to which Plaintiff is not
19 entitled. (Id.)
20 Further, Plaintiff’s argument is foreclosed by Yee v. Escondido, Cal., 503 U.S. 519 (1992)
21 and Ninth Circuit caselaw interpreting Yee. There, the Supreme Court rejected the theory a rent
22 control ordinance similar to Petaluma’s essentially caused a “physical occupation of the park
23 owner’s land” because the ordinance “transferred … the right to occupy the land indefinitely at a
24 submarket rate[ ] from the park owner to the mobile home owner.” 503 U.S. at 527. Although
25 Yee’s holding was limited to the argument the ordinance constituted a physical invasion of land,
26 the Court’s reasoning strongly suggested an ordinance like Petaluma’s must be analyzed as a
27 regulatory taking:
petitioners’ use of their land by regulating the relationship between
1 landlord and tenant. This Court has consistently affirmed that States
have broad power to regulate housing conditions in general and the
2 landlord-tenant relationship in particular without paying
compensation for all economic injuries that such regulation entails.
3 When a landowner decides to rent his land to tenants, the government
may place ceilings on the rents the landowner can charge, or require
4 the landowner to accept tenants he does not like, without
automatically having to pay compensation. Such forms of regulation
5 are analyzed by engaging in the “essentially ad hoc, factual inquiries”
necessary to determine whether a regulatory taking has occurred. In
6 the words of Justice Holmes, “while property may be regulated to a
certain extent, if regulation goes too far it will be recognized as a
7 taking.”
8 Yee, 503 U.S. at 528–29 (internal citations and quotation marks omitted). Indeed, the Ninth
9 Circuit held, en banc, “Yee v. City of Escondido holds that a takings challenge to mobile home rent
10 control ordinances similar to [Defendant’s] should be analyzed as a regulatory taking[, …] not a
11 physical occupation amount to a per se taking[.]” Guggenheim v. City of Goleta, 638 F.3d 1111,
12 1120 (9th Cir. 2010) (en banc). In Guggenheim, the plaintiffs there, mobilehome park owners,
13 raised a virtually identical theory to Plaintiffs’ challenge here: “by locking in a rent below market
14 rents, and allowing tenants to sell their mobile homes to buyers who still enjoy the benefits of the
15 controlled rent[, …] the ordinance shifts much of the value of ownership of the land […] to the
16 tenant.” Id. at 1115. And interpreting Yee, the Ninth Circuit held that ordinance is not a per se
17 taking. Id. at 1120. So, Plaintiff’s per se challenge fails.
18 At the hearing, Plaintiff urged Koontz, rather than Yee and Guggenheim, is controlling.
19 Plaintiff asserts Yee and Guggenheim only addressed “physical” per se theories, whereas Koontz is
20 a new type of per se claim. Not so. This Court is bound by Yee and Guggenheim unless “the
21 reasoning or theory” in those cases “is clearly irreconcilable with the reasoning or theory” of
22 Koontz. See Miller v. Gammie, 335 F.3d 889, 893 (9th Cir. 2003). Koontz did not involve a rent
23 control ordinance; it explicitly applies to government conduct “when owners apply for land-use
24 permits.” 570 U.S. at 604. So, Koontz is not “clearly irreconcilable” with Yee or Guggenheim.
25 And even if Koontz broadly applied to any situation where the government “direct[s] someone to
26 spend money,” id. at 614, as explained above, Plaintiff has not alleged facts sufficient to support
27 an inference the government has forced Plaintiff to spend money because, drawing inferences in
1 Plaintiff’s reliance on Levin v. City & County of San Francisco, 71 F. Supp. 3d 1072 (N.D.
2 Cal. 2014) is also misplaced. There, the court found an ordinance requiring landlords to pay a
3 lump-sum payment to tenants effected a per se taking. See id. at 1077-86. But drawing inferences
4 in Plaintiff’s favor, Petaluma’s ordinance does not require Plaintiff to pay or relinquish money.
5 Despite Plaintiff’s attempts to define their losses in terms of “Premiums,” the bottom line is
6 Plaintiff merely alleges a reduction in future rental income.4 To the extent that constitutes a
7 taking, the Supreme Court has “consistently affirmed” it is not a per se taking. Yee, 503 U.S. at
8 528-29; see id. (“When a landowner decides to rent his land to tenants, the government may place
9 ceilings on the rents the landowner can charge[.]”); FCC v. Florida Power Corp., 480 U.S. 245,
10 252 (1987) (“statutes regulating the economic relations of landlords and tenants are not per
11 se takings”); Guggenheim, 638 F.3d at 1115 (holding is it not a per se taking for a mobile home
12 rent control ordinance to “lock[] in a rent below market rents” and therefore “shift[] much of the
13 value of ownership of the land … to the tenant.”)
14 So, the Court grants Defendant’s motion as to Plaintiff’s per se takings claim.
15 B. Regulatory Taking
16 An ordinance is a regulatory taking when it is “functionally equivalent to the classic taking
17 in which government directly appropriates private property or ousts the owner from his domain.”
18 Lingle v. Chevron U.S.A. Inc., 544 U.S. 528, 539 (2005). “[A] takings challenge to [a] mobile
19 home rent control ordinance … should be analyzed as a regulatory taking under Penn Central
20 [Transportation Co. v. New York City, 438 U.S. 104 (1977)].” Guggeinheim, 638 F.3d at 1120.
21 Courts apply three Penn Central factors to determine whether government conduct is a
22 regulatory taking. First, “‘[p]rimary among those factors are the economic impact of the
23
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4 A district court recently dismissed an as-applied challenge to Petaluma’s ordinance brought by
Plaintiff’s counsel, noting the plaintiffs there were “careful” in how they framed their economic
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injuries. See Little Woods Mobile Villa LLC v. City of Petaluma, 736 F. Supp. 3d 757, 761 (N.D.
Cal. 2024) (“Plaintiffs allege that it is economically infeasible to continue operating their parks
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because the City’s rent-control ordinance prevents Plaintiffs from raising rents[. …] Plaintiffs
say[] they are being forced to operate their parks at an ‘economic loss.’”); id. at 763 n.1 (“The best
27
reading of the complaint seems to be that Plaintiffs are currently making some profit; they are
1 regulation on the claimant[.]” Guggeinheim, 638 F.3d at 1120 (quoting Lingle, 544 U.S. at 538–
2 39). The second factor, which overlaps with the first, is “‘the extent to which the regulation has
3 interfered with distinct investment-backed expectations.’” Guggeinheim, 638 F.3d at 1120
4 (quoting Lingle, 544 U.S. at 538–39). Third, courts consider “the ‘character of the governmental
5 action’–for instance whether it amounts to a physical invasion or instead merely affects property
6 interests through ‘some public program adjusting the benefits and burdens of economic life to
7 promote the common good.’” Lingle, 544 U.S. at 539 (quoting Penn Central, 438 U.S. at 124).
8 Plaintiff asserts the vacancy control amendment is a regulatory taking under the Penn
9 Central factors. First, the law has a “severe” economic impact on Plaintiff because “almost 90%
10 of a mobile home’s sale price represents the value of the lower rents set by the rent-control law,
11 and this Premium goes into the pockets of the … residents[] who happened to live at the park at
12 the time of the Ordinance’s enactment.” (Dkt. No. 18 ¶ 44.) Second, the vacancy control
13 amendment “undermines investment-backed expectations, as it was enacted after [Plaintiff]
14 acquired the park and flies in the face of the expectations of both [Plaintiff] and residents that rents
15 can be reset to market following a lawful vacancy.” (Id. ¶ 45.) Third, Plaintiff emphasizes the
16 vacancy control amendment regulates some actors, but not others: the ordinance “restricts only the
17 amount the landowner can charge a new resident for rental” and “does not limit the amount which
18 the outgoing resident, in turn, can demand for sale of his mobile home to that new resident, who
19 must pay an artificially high price to buy the mobile home.” (Id. ¶ 46.) Notably, Plaintiff does not
20 cite any authority holding a rent control ordinance constitutes a regulatory taking.
21 To the contrary, the Ninth Circuit has held, on nearly identical facts, a mobilehome rent
22 control ordinance did not constitute a regulatory taking. MHC Fin. Ltd. P’ship v. City of San
23 Rafael, 714 F.3d 1118 (9th Cir. 2013), addressed a mobilehome rent control ordinance enacted in
24 1989 which, like Petaluma’s ordinance, tied permissible rent increases to inflation. Id. at 1122. In
25 1993, the ordinance was amended “to add ‘vacancy control,’ which gave any new resident taking
26 over a mobilehome pad lease the right to rent the pad at the same rate as the previous tenant.” Id.
27 at 1122. Then, in 1999, the government amended the ordinance again to adjust the permissible
1 and 1999 amendments’ adoptions. See id. at 1122–23, 1127.5 In the lawsuit, the plaintiff
2 challenged the “the entire Ordinance as it existed in 1999,” including the 1993 vacancy control
3 amendment.6 See id. at 1122–23, 25.
4 Applying the Penn Central factors, MHC held the ordinance did not constitute a regulatory
5 taking. First, under the “economic impact” factor, the district court found the rent control
6 ordinance caused an “81% diminution in value” of the park “by comparing the effect of the 1999
7 Ordinance with the hypothetical economic result assuming that there was no rent control
8 ordinance in effect at all.” MHC, 714 F.3d at 1127. The MHC court held that analysis was an
9 error in two ways. First,
10 that analysis assumes that MHC purchased the property prior to the
enactment of the original ordinance, when it did not. The ordinance
11 was in effect when MHC acquired the property. Therefore, the
appropriate analysis of the economic impact on MHC is a comparison
12 of the economic impact of the 1993 Ordinance in effect when MHC
purchased the mobilehome park, and the economic effect of the 1999
13 Ordinance enacted after the property acquisition. See [Lingle, 544
U.S. at 538–39] (focusing on the “economic impact of the
14 regulation”).
15 MHC, 714 F.3d at 1127. Second, even assuming that 81% diminution in value was correct, that
16 reduction was not “sufficient economic loss or interference with [the park owner’s] reasonable
17 investment-backed expectations to constitute a taking. Supreme Court precedent has long
18 established that mere diminution in the value of property, however serious, is insufficient to
19 demonstrate a taking.” Id. at 1127–28 (citing three Supreme Court cases finding no taking when
20 the regulations, respectively, caused an “approximately 75% diminution in value,” a “92.5%
21 diminution,” and a 90% diminution).
22
23
5 The opinion does not provide the exact date or year on which the plaintiff purchased the park.
But MHC makes clear the plaintiff purchased the park “[w]hile” a prior state court suit challenging
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the 1993 ordinance amendment was “on appeal,” and cites the state court decision upholding the
ordinance: “De Anza Assets, Inc. v. City of San Rafael, Case No. A063017 (Cal.Dist.Ct.App. Oct.
25
6, 1994).” See MHC, 714 F.3d at 1122–23. Later, MHC notes the plaintiff “did not” “purchase[]
the property prior to the enactment of the original ordinance” in 1989 and “[t]he ordinance was in
26
effect when [the plaintiff] acquired the property.” Id. at 1127.
6 The Ninth Circuit ruled the plaintiffs could raise arguments regarding the 1993 vacancy control
27
amendment, despite a one-year statute of limitations, “because the constitutionality of the
1 Second, under the “investment-backed expectations” factor, the plaintiff urged it had the
2 expectation it would be able to ‘increase rent at a rate consistent with the rate of increase in
3 housing costs … that is, [the] expectation was that [the park] would be subject to no rent control at
4 all.” Id. at 1128 (cleaned up). The district court below agreed, finding the park owner “had no
5 reason to expect that the City would amend the Ordinance, transferring much of the park’s value
6 to third parties[.]” Id. (cleaned up). The Ninth Circuit ruled that holding was an error:
7 “‘[T]hose who do business in the regulated field cannot object if the
legislative scheme is buttressed by subsequent amendments to
8 achieve the legislative end.’ ” Concrete Pipe [& Prods. Of Cal., Inc
v. Constr. Laborers Pension Trust for S. Cal.,], 508 U.S. [602,] 645
9 [(1993)]
10 Indeed, sitting en banc in Guggenheim[ …], we recently held that the
“‘primary factor,’ ‘the extent to which the regulation has interfered
11 with distinct investment-backed expectations’” to be “fatal” to the
Guggenheims’ takings claim, where the Guggenheims purchased a
12 mobilehome park with a rent control ordinance already in place. 638
F.3d at 1120. “[T]he price they paid for the mobile home park
13 doubtless reflected the burden of rent control they would have to
suffer. They could have no ‘distinct investment-backed expectations'
14 that they would obtain illegal amounts of rent.” Id. Therefore, this
factor also favors the conclusion that no taking occurred.
15
MHC, 714 F.3d at 1128. Finally, evaluating the “character of the ordinance,” MHC held the
16
ordinance was “much more an ‘adjustment of the benefits and burdens of economic life to
17
promote the common good’ than it is a physical invasion of property, and [the amendments] only a
18
slight modification to an already-existing rent control ordinance[.]” Id. (quoting Penn Central,
19
438 U.S. at 124).
20
In light of MHC, and drawing all inferences in Plaintiff’s favor, Plaintiff does not allege
21
facts plausibly supporting an inference the vacancy control amendment is a Penn Central
22
regulatory taking. First, Plaintiff emphasizes Petaluma’s ordinance effectively transfers 90% of
23
the value of home sale prices to people who were tenants at the time of the ordinance’s enactment.
24
That is insufficient under Penn Central’s first factor because the factor inquires about the severity
25
of impact, and Plaintiff does not quantify the ordinance’s economic impact on Plaintiff; instead,
26
Plaintiff attempts to quantify the ordinance’s impact on mobilehome sale prices. So, Plaintiff has
27
not alleged facts showing how much the vacancy control amendment impacts Plaintiff. Plaintiff’s
1 failure to quantify an economic impact means it has not alleged facts sufficient to support an
2 inference the economic impact is so severe the ordinance is functionally equivalent to a classic
3 taking.7 See MHC, 714 F.3d at 1127–28 (citing Supreme Court cases finding a 90% reduction in
4 property values was an insufficient economic impact on the plaintiffs).
5 Second, drawing inferences in Plaintiff’s favor, Plaintiff has not alleged facts supporting
6 an inference the vacancy control amendment interfered with its reasonable investment-backed
7 expectations. Petaluma enacted the ordinance in 1994, then enacted the challenged amendment in
8 2025. Plaintiff alleges it purchased the park before the 2025 amendment’s enactment and, at the
9 hearing, clarified its purchase occurred after the original ordinance’s enactment. Hence, Plaintiff
10 contends “it had no reasonable investment-backed expectations that” the 2025 ordinance
11 amendment “would be adopted.” (See Dkt. No. 25 at 11.) But because rent control was in effect
12 when Plaintiff purchased the park, or, at least, Plaintiff does not allege that it was not, Plaintiff’s
13 argument is foreclosed by binding Ninth Circuit precedent. In Guggenheim, the ordinance passed
14 in 1987, and the park owners purchased the park in 1997. 638 F.3d at 1115. The park owners,
15 like Plaintiff here, asserted the ordinance “transfer[red] … rent … from the landlord to the tenant,
16 and that this had the effect of raising the price of the average mobile home.” Id. at 1120. The
17 court assumed that impact happened, and noted the ordinance caused that impact
18 before the [owners] bought the mobile home park. Since the
ordinance was a matter of public record, the price they paid for the
19 mobile home park doubtless reflected the burden of rent control they
20
7 Plaintiff also alleges “due to the City’s onerous rent-control law, Capri’s space rents are roughly
21
40% of their fair market value.” (Dkt. No. 18 ¶ 25.) But Plaintiff does not mention this allegation
in the “regulatory taking theory” section of its opposition brief. (Dkt. No. 25 at 10-11) (cleaned
22
up). To the extent this allegation quantifies the economic impacts on Plaintiff, the allegation is
insufficient because Plaintiff specifically challenges the 2025 vacancy control amendment.
23
Therefore, “the appropriate analysis of the economic impact on [Plaintiff] is a comparison of the
economic impact of the […] Ordinance in effect when [Plaintiff] purchased the mobilehome park,
24
and the economic effect of the [amendment] enacted after the property acquisition” in 2025. See
MHC, 714 F.3d at 1127. Plaintiff does not allege when it acquired the park and does not quantify
25
losses since the amendment’s enactment. Plaintiff also expressly alleges space rents are so low
compared to market value “due to the City’s onerous rent-control law,” not due to the 2025
26
vacancy control amendment, so Plaintiff has not conducted the “appropriate analysis.” See id.;
(Dkt. No. 18 ¶ 25.) Because Plaintiff has not quantified the economic effect of the 2025 vacancy
27
control amendment, as opposed to the ordinance as a whole, drawing inferences in Plaintiff’s
would have to suffer. They could have no ‘distinct investment-backed
1 expectations’ that they would obtain illegal amounts of rent. […] The
[owners] bought a trailer park burdened by rent control, and had no
2 concrete reason to believe that they would get something much more
valuable, because of hoped-for legal changes, than what they had.
3
4 Id. at 1120-1121. Similarly, in MHC, the original “ordinance was in effect when [the plaintiff]
5 acquired the property,” but the plaintiff challenged an amendment enacted after it purchased the
6 property. MHC, 714 F.3d at 1127–28. Relying on Guggenheim, MHC ruled it was erroneous for
7 the district court to conclude the park owner “had no reason to expect that the City would amend
8 the Ordinance, transferring much of the park’s value to third parties” because “‘those who do
9 business in the regulated field cannot object if the legislative scheme is buttressed by subsequent
10 amendments to achieve the legislative end.’” Id. (quoting Concrete Pipe, 508 U.S. at 645). For
11 that reason, MHC squarely forecloses Plaintiff’s argument it had a reasonable investment-backed
12 expectation the 2025 ordinance amendment would not be adopted. Plaintiff concedes it purchased
13 the park while Petaluma’s rent control ordinance was in effect–that is, Plaintiff began “do[ing]
14 business” in a “regulated field,” and therefore “cannot object” to Petaluma’s “subsequent
15 amendments to achieve the [ordinance’s] legislative end.” Id.
16 Finally, Plaintiff cites no authority for its argument a rent control ordinance’s character is
17 akin to a classic taking, except to say “regulatory takings cases necessarily entail complex factual
18 assessments of the purposes and economic effects of government actions” and “[a] motion to
19 dismiss is not an appropriate mechanism for resolving factual disputes.” (Dkt. No. 25 at 11.)
20 (cleaned up). Drawing inferences in Plaintiff’s favor, Plaintiff’s allegations do not plausibly
21 support an inference the ordinance’s purposes or effects make the law functionally equivalent to a
22 classic taking. The ordinance’s plain text demonstrates, among other things, its purpose is to limit
23 rent increases for mobile home park tenants, who are primarily low-income or elderly and who
24 have limited bargaining power over park owners in negotiating rent increases. See generally
25 Petaluma Cal. Municipal Code Ch. 6.50.010. And the Supreme Court and Ninth Circuit have
26 made clear, without reference to specific facts, a rent control ordinance’s effects are not equivalent
27 to a physical or per se taking. See Yee, 503 U.S. at 528–29 (“This Court has consistently affirmed
1 relationship in particular without paying compensation for all economic injuries that such
2 regulation entails.”) (cleaned up); id. at 528 (“Put bluntly, no government has required any
3 physical invasion of petitioners’ property. Petitioners’ tenants were invited by petitioners, not
4 forced upon them by the government. […] [A] typical rent control statute will transfer wealth from
5 the landlord to the incumbent tenant and all future tenants. […] This effect […] has nothing to do
6 with whether the ordinance causes a physical taking.”); MHC, 714 F.3d at 1127-28 (noting the
7 Penn Central inquiry is about how “the interference with property can be characterized” and
8 ruling, without reference to specific facts, “the Ordinance is much more an adjustment of the
9 benefits and burdens of economic life to promote the common good than it is a physical invasion
10 of property”) (cleaned up)).
11 So, the Court grants Defendant’s motion as to Plaintiff’s regulatory-takings claim because
12 drawing all inferences in Plaintiff’s favor, Plaintiff has not alleged facts supporting an inference
13 the ordinance is a regulatory taking.
14 C. Plaintiff’s As-Applied Takings Challenge is Not Ripe
15 Defendant argues Plaintiff’s as-applied takings challenge is not ripe because Plaintiff has
16 not alleged it petitioned for a rent increase. The Court agrees. “[A] regulatory takings claim is not
17 ripe until the appropriate administrative agency has made a final decision on how the regulation
18 will be applied to the property at issue.” Guggenheim, 638 F.3d at 1117. To satisfy the
19 requirement, “all a plaintiff must show is that there is no question … about how the regulations at
20 issue apply to the particular land in question.” Pakdel v. City & Cnty. of San Francisco, 594 U.S.
21 474, 478 (2021). The ripeness requirement is “prudential,” not jurisdictional. Suitum v. Tahoe
22 Regional Planning Agency, 520 U.S. 725, 733-34 (1997).
23 Drawing inferences in Plaintiff’s favor, Plaintiff has not alleged facts supporting an
24 inference its as-applied challenge is ripe because Plaintiff has not alleged whether it petitioned the
25 City to increase rent above the ordinance’s annual limits. As explained above, the “primary”
26 factor in Plaintiff’s as-applied regulatory takings claim is the economic impact on Plaintiff.
27 Guggenheim, 638 F.3d at 1120 (cleaned up). Yet Plaintiff does not specify how much income it
1 economic impact are based on generalized findings from “[s]ome studies,” an allegation rent
2 values are 40% of fair market value due to the entire ordinance, and one example of “a
3 mobilehome for sale at the park” for which Plaintiff “expects” a vacancy “to occur at the park in
4 the next several months.” (See Dkt. No. 18 ¶¶ 20, 25-27.) While these allegations suggest the
5 vacancy control amendment has at least some economic impact, the ordinance provides a potential
6 remedy to offsets those harms: Plaintiff can petition the City for an arbitration hearing, offer
7 evidence its rental income is not providing it a “fair return,” and subsequently earn the right to
8 charge rents in excess of the ordinance’s limits. See generally Petaluma, Cal. Municipal Code Ch.
9 6.50.040, 6.50.060. Because Plaintiff has not availed itself of a potential remedy which could
10 reduce the amendment’s economic impact, the Court cannot ascertain how “the regulations at
11 issue apply to the particular land in question,” namely the degree to which the vacancy control
12 amendment impacts Plaintiff. See Pakdel, 594 U.S. at 478; MHC, 714 F.3d at 1127 (“[T]he
13 constitutionality of the Ordinance can only be determined by evaluating the totality of its
14 provisions and effects and because […] amendments cannot be evaluated in isolation.”)
15 So, the Court grants Defendant’s motion to dismiss as to Plaintiff’s as-applied takings
16 claims.
17 II. Substantive Due Process
18 Plaintiff’s substantive due process claim hinges on whether the ordinance is “rationally
19 related to a legitimate governmental purpose. We will strike down a statute on substantive due
20 process grounds if it is arbitrary and irrational.” MHC, 714 F.3d at 1130 (cleaned up). “[T]he
21 threshold for a rationality review challenge asks only whether the enacting body could have
22 rationally believed at the time of enactment that the law would promote its objective.” Id. at
23 1130–31 (citing Equity Lifestyle Props., Inc. v. Cnty. of San Luis Obispo, 548 F.3d 1184, 1194
24 (9th Cir. 2008)).
25 Plaintiff argues the vacancy control amendment has neither a legitimate governmental
26 purpose nor a rational connection to such a purpose. First, Plaintiff construes the City’s interest as
27 “enriching a select few” residents “at the expense of park owners” and of “incoming residents who
1 were the government interest at issue,” the amendment “bears no rational relationship to the
2 promotion of housing affordability” because the amendment “transfers a premium from park
3 owner to existing residents,” which increases mobilehome prices. (Dkt. No. 25 at 14-15.)
4 Drawing inferences in Plaintiff’s favor, Plaintiff has not alleged facts supporting an
5 inference the vacancy control amendment lacks a rational connection to a legitimate government
6 interest. A rent-control ordinance has a legitimate government interest “if it is designed to
7 accomplish an objective within the government’s police power.” Equity Lifestyle, 548 F.3d at
8 1194 (cleaned up). The ordinance is “designed” to accomplish purposes within the government’s
9 police power because it expressly identifies the City’s interests in promoting affordable housing,
10 reducing homelessness, protecting existing mobilehome tenants from “unreasonable […] rent
11 increases,” and many more.8 See Equity Lifestyle, 548 F.3d at 1194. And the Supreme Court and
12 Ninth Circuit have held highly similar interests are legitimate, and well within the government’s
13 police power. See Pennell v. City of San Jose, 485 U.S. 1, 13 (1988) (“[W]e have long recognized
14 that a legitimate and rational goal of price or rate regulation is the protection of consumer
15 welfare”); Equity Lifestyle, 548 F.3d at 1194 (relying on Pennell to find a “legitimate public
16 purpose” when a rent control ordinance “includes a paragraph describing its purpose, which is to
17 ‘protect the owners and occupiers of mobilehomes from unreasonable rent increases[.]’”).
18 Therefore, Plaintiff’s allegations, which do not mention the ordinance’s expressly stated purposes,
19 do not permit an inference the City does not share those interests,9 or an inference those interests
20
8 See, e.g., Petaluma, Cal. Municipal Code Ch. 6.50.010(E) (outlining survey results showing
21
mobilehome park residents tend to be elderly and low-income); Ch. 6.50.010(L) (“The city of
Petaluma is committed to assisting in the preservation of decent, safe and sanitary housing
22
affordable to all economic segments of the community, especially mobilehome lots affordable to
low and very low income individuals and families.”); Ch. 6.50.010(M) (“there is a shortage of
23
spaces … a condition which … tends to prevent normal competition between the owners and
tenants of mobilehome parks); Ch. 6.50.010(T) (noting residents “have expressed the concern that
24
they could become homeless” due to “significant rent increases”); Ch. 6.50.010(X)(1)-(2)
(identifying two of the ordinance’s purposes as “[p]reventing the imposition of exploitive,
25
excessive and unreasonable mobilehome space rent increases[]” and “[a]lleviating the unequal
bargaining power which exists between mobilehome park residents and mobilehome park
26
owners.”)
9 Plaintiff characterizes the City’s interest as “enriching a select few” residents “at the expense of
27
park owners” and of “incoming residents” and rejects the notion the City has an interest in
1 are not legitimate.
2 Second, drawing inferences in Plaintiff’s favor, Plaintiff has not alleged facts supporting
3 an inference the vacancy control amendment lacks a rational connection to the City’s asserted
4 interests. Again, the test is “whether the enacting body could have rationally believed at the time
5 of enactment the law would promote its objective.” Id. Here, the City of Petaluma “could have
6 rationally believed” the vacancy control amendment promotes affordable housing and reduces
7 homelessness because it eliminates scenarios in which park owners could significantly raise rents
8 on low-income and middle-income residents. Id.; see Petaluma, Cal. Municipal Code Ch.
9 6.50.010(E) (finding mobilehome park residents tend to be elderly and low-income); id. Ch.
10 6.50.010(S) (“mobilehome owners generally have very limited economic bargaining power
11 concerning rents charged for mobilehome lots.”); Ch. 6.50.010(T) (echoing residents’ concerns
12 “they could become homeless” due to “significant rent increases”). Plaintiff’s allegations do not
13 support an inference otherwise because whether the vacancy control amendment actually “will
14 serve the purposes stated in the ordinance … is not for [courts] to decide.” Guggenheim, 638 F.3d
15 at 1123. Plaintiffs may be correct the amendment “causes the prices of homes to artificially and
16 substantially increase.” (Dkt. No. 25 at 15.) But because the City of Petaluma “could have
17 rationally believed otherwise,” the amendment does not violate substantive due process. Equity
18 Lifestyle, 548 F.3d at 1194; see Levald, Inc. v. City of Palm Desert, 998 F.2d 680, 690 (9th Cir.
19 1993) (“It may be true that in operation the ordinance does nothing more than take money from
20 the landlord and put it into the pocket of a tenant who no longer resides at the park. However,
21 while one might believe that the ordinance is an ineffective—and indeed draconian—means by
22 which to effect its goals, how well the ordinance serves its purposes is a legislative question, one
23
24
“the enacting body could have rationally believed at the time of enactment.” See Equity Lifestyle,
548 F.3d at 1193–94 (emphasis added). For example, in Equity Lifestyle, the plaintiff argued a
25
rent control ordinance “sole purpose” was to “transfer[] the value of [the park owner’s] property to
a select private group of tenants.” Id. at 1193. The Ninth Circuit noted “[t]his argument
26
challenges the foundation of the rent control law and would, if accepted, require its invalidation,”
then identified the government’s purpose by referencing the ordinance’s text. See id. at 1193–94.
27
Therefore, to identify the relevant government purpose here, the Court refers to the ordinance’s
1 the court will not consider in the context of a substantive due process challenge.”) (cleaned up);
2 Guggenheim, 638 F.3d at 1123 (“[T]he Due Process Clause does not empower courts to impose
3 sound economic principles on political bodies.”)
4 Accordingly, the Court grants Defendant’s motion and dismisses Plaintiff’s substantive
5 due process claim.
6 III. Leave to Amend
7 Dismissal is without leave to amend for Plaintiff’s per se takings claim and substantive due
8 process claim because amendment would be futile. Guggenheim and Yee make clear challenges to
9 mobilehome rent control ordinances are not per se takings, and the ordinance cannot be reasonably
10 interpreted to authorize a physical invasion of Plaintiff’s property. So, Plaintiff is unable to allege
11 facts supporting a per se takings claim challenging Petaluma’s vacancy control amendment.
12 Plaintiff also cannot cure the defects in its substantive due process claim because such claims do
13 not hinge on specific allegations; rather, they hinge on the statute, binding precedent, and what
14 purposes legislators could reasonably believe. However, the Court grants Plaintiff leave to amend
15 its regulatory-takings claim because Plaintiff may be able to articulate sufficient economic impacts
16 under Penn Central‘s first factor and/or a cognizable investment-backed expectations under Penn
17 Central’s second factor. Finally, the Court’s dismissal of Plaintiff’s as-applied challenge as unripe
18 is without leave to amend, but also without prejudice since it is a jurisdictional dismissal. See
19 Wolfson v. Brammer, 616 F.3d 1045, 1064 (9th Cir. 2010).
20 CONCLUSION
21 As explained above, the Court grants Defendant’s motion and dismisses Plaintiff’s claims.
22 Drawing inferences in Plaintiff’s favor, Plaintiff has not alleged facts sufficient to support an
23 inference its as-applied takings challenge is ripe or an inference Petaluma’s rent control ordinance
24 is a per se taking, a regulatory taking, or a violation of Plaintiff’s substantive due process rights.
25 Dismissal is without leave to amend, except for Plaintiff’s regulatory-taking claim. Plaintiff’s
26 amended complaint, if any, shall be due June 30, 2026. If Plaintiff does not file an amended
27 complaint by that date, judgment will be entered.
1 IT IS SO ORDERED.
2 || Dated: May 21, 2026
4 ne
ACMUELINE SCOTT CORLE
5 United States District Judge
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