In this case we must decide whether the district court properly granted summary judgment on Appellants’ equal protection challenge to two City of Miami, Florida, ordinances prohibiting some, but not all, houseboats in the City. We affirm.
*920 I. BACKGROUND
A. Facts
Appellants Stanley and Marjorie Haves have lived aboard a houseboat 1 in the City of Miami (City or Appellee) since 1970. Their houseboat is moored in the Little River Canal, alongside unimproved property owned by Marjorie Haves. The property is zoned R-l residential by the City.
The City permitted residential use of houseboats until 1987, 2 when City Ordinance 10246 was adopted. Ordinance 10246 prohibited houseboats in the Little River Canal and in residential sections of the Miami River. City of Miami, Fla., Ordinance 10246 §§ 15183.1; 2024.1.4 (March 31, 1987). The Ordinance’s stated goals were to (1) prevent potential hazards to navigation, (2) eliminate waste water discharge and other pollution, and (3) eliminate visual intrusions in residential neighborhoods. City of Miami Ordinance 10246 § 15181.
In 1990, the City adopted Ordinance 11000 to replace the existing comprehensive zoning ordinance, superseding Ordinance 10246 in the process. Ordinance 11000 adopted a comprehensive ban on the residential occupancy of all vessels, including houseboats, within the City. See City of Miami, Fla., Ordinance 11000 § 400.1 (March 8,1990). In October 1991, the City adopted Ordinance 10932, which amended Ordinance 11000. Ordinance 10932 modifies the comprehensive houseboat ban by permitting 38 existing houseboats moored in the Miami River to remain despite Ordinance 11000. Ordinance 10932, however, does not grandfather those houseboats moored in the Little River Canal. See City of Miami, Fla., Ordinance 10932 § 940 (October 24, 1991); Attachment A. 3
B. Procedural History
Appellants filed this case in state court to challenge the validity of Ordinances 10932 and 11000. 4 Appellee promptly removed to federal court based on federal subject matter jurisdiction.
Appellants’ pro se complaint alleged that the City’s adoption of the Ordinances violated the Equal Protection and Due Process Clauses of the United States Constitution and effected a taking in violation of the Fifth Amendment. It also alleged violations of rights secured by Sections 1 and 12 of the Declaration of Rights of the Constitution of Florida, and made an inverse condemnation claim under Florida law. The complaint asked for declaratory, injunctive, and monetary relief.
Following cross-motions for summary judgment and the presentation of extensive documentary evidence, the magistrate judge recommended granting Appellee’s motion for summary judgment. The magistrate found that all of Appellants’ claims depended upon the deprivation of a protectable property interest and that the lack of such an interest rendered summary judgment appropriate. The report did not specifically address Appellants’ equal protection claim.
The district court adopted the magistrate’s report and recommendation and dismissed Appellants’ suit. This appeal follows.
II. DISCUSSION
Appellants abandoned their substantive due process, Fifth Amendment takings, and *921 Florida inverse condemnation claims at oral argument. Any other state law claims, if not abandoned, are patently frivolous. 5 Therefore, the only issue before us is whether the district court properly dismissed Appellants’ claim that Ordinances 10932 and 11000 violate the Constitution’s guarantee of equal protection.
A Standard of Review
This Court reviews the granting of summary judgment
de novo,
applying the same legal standards which bound the district court.
Parks v. City of Warner Robbins, Ga.,
The mere existence of some factual dispute will not defeat summary judgment unless that factual dispute is material to an issue affecting the outcome of the case.
Anderson v. Liberty Lobby, Inc.,
B. The Equal Protection Claim
The Equal Protection Clause proclaims that “No State shall ... deny to any person within its jurisdiction the equal protection of the laws.” U.S. Const. Amend. XIV, § 1. This rule of equal treatment does not depend on the existence of an underlying property right.
Reserve, Ltd. v. Town of Longboat Key,
Appellants do not allege that Ordinances 10932 and 110Ó0 contain “suspect classifications” on the basis of race, alienage, nátional origin, gender, or illegitimacy, nor do they allege that the Ordinances burden “fundamental rights” such as privacy and travel.
See City of Cleburne, Texas v. Cleburne Living Ctr., Inc.,
The first step in determining whether legislation survives rational-basis scrutiny is identifying a legitimate government purpose — a goal — which the enacting government body
could
have been pursuing. The
actual
motivations of the enacting governmental body are entirely irrelevant.
Beach Communications,
— U.S. at -, -,
The second step of rational-basis scrutiny asks whether a rational basis exists for the enacting governmental body to believe that the legislation would further the hypothesized purpose. “The proper inquiry is concerned with the
existence
of a conceivably rational basis, not whether that basis was actually considered by the legislative body.”
Panama City,
It is clear that the houseboat restrictions in City Ordinance 11000 are constitutional under the principles outlined above. Its predecessor, Ordinance 10246, lists the prevention of (1) navigational hazards, (2) pollution, and (3) visual intrusions as its purposes. City of Miami Ordinance 10246, § 15181. The Court can accept these purposes as applying equally to Ordinance 11000 because nothing required the Miami City Commission to articulate its concerns when it enacted Ordinance 11000,
Nordlinger,
— U.S. at -,
The grandfathering of existing units under Ordinance 10923 also serves a legitimate' government purpose. . The Equal Protection Clause gives government decision-makers wide latitude when creating policy exemptions to an existing law.
Nordlinger,
— U.S. at -,
Appellants argue that the City’s different treatment of the Miami River houseboats versus the Little River Canal houseboats violates equal protection. First, they contend that the classifications made by Ordinance 10932 are not related to a legitimate government purpose. On the contrary, Appellants maintain that the City’s purpose in treating the Little River Canal houseboat owners differently stems from an improper motive to retaliate for past litigation. Second, Appellants contend that, even if certain legitimate interests justify some City action to curtail vessel occupancy, the classifications drawn by Ordinances 11000 and 10932, by immediately eliminating Little River Canal house *923 boats but grandfathering their Miami River counterparts, are not rationally related to the interests asserted by the City. Because factual disputes regarding the actual motives behind Ordinance 10932 and the rationality of the Ordinances still remain, Appellants maintain that summary judgment was inappropriate. We disagree.
While Appellants presented some evidence that Ordinance 10932’s partial grandfathering scheme was motivated by an improper retaliatory motive, that evidence is irrelevant to our rational-basis inquiry.
Beach Communications,
— U.S. at -,
Addressing Appellants’ second argument, we must decide if the classifications drawn by Ordinance 10932 are rationally related to the achievement of the legitimate purposes identified by the City. The City identifies five reasons for treating Little River Canal houseboats different from Miami River houseboats. According to the City, the Little River Canal is: (1) more residential; (2) less industry intensive; (3) less polluted; (4) not as heavily trafficked; and (5) significantly narrower than the Miami River. If
any one
of these reasons could justify eliminating the Little River Canal houseboats while allowing the Miami River houseboats to remain, then the Ordinance must be upheld.
See Beach Communications,
— U.S. at -,
Appellants failed to meet their burden of negating the City’s proffered rationales.
See Beach Communications,
— U.S.- at -,
Reasonable people might disagree on the ultimate wisdom of the City’s zoning decisions. But such disagreement does not create a material issue of fact for purposes of surviving a summary judgment motion. The inquiry is whether the zoning board could rationally believe that the Ordinances furthered some legitimate government purpose. Ordinances 10932 and 11000 certainly meet this lenient test. We hold that Miami City Ordinances 10932 and 11000 are rationally related to legitimate government purposes and, therefore, do not violate the Equal Protection Clause of the Constitution.
III. CONCLUSION
The leniency of rational-basis scrutiny provides the political branches the flexibility to address problems incrementally and to
*924
engage in the delicate line-drawing process of legislation without undue interference from the judicial branch.
Beach Communications,
— U.S. at -,
AFFIRMED.
Notes
. In this opinion, the term "houseboat" refers to all houseboats, housebarges, and other “live-aboard" vessels.
. Prior zoning ordinances permitted the occupancy of houseboats and other vessels if the occupants received a special permit. See City of Miami, Fla., Ordinances 6871; 9500 (June 27, 1983). The Appellants never sought, and therefore never received, a special permit allowing their occupation of the houseboat.
. Appellants' initial brief suggests that § 904.3 of Ordinance 10932 creates a blanket exception for houseboats docked on improved residential property. After reviewing the language of the Ordinance and its legislative history, we conclude that no such exception exists. By providing that "one housebarge may be added to the dwelling unit per lot of record," Ordinance 10932 merely exempts the grandfathered Miami River houseboat owners from Ordinance 11000’s "[o]ne dwelling unit per lot” requirement.
.Appellants’ complaint also mentions "two previous ordinances.” Presumably, this is a reference to Ordinance 11000's predecessors, City Ordinances 6871 and 9500, and Ordinance 10246, which amended Ordinance 9500. Appellants now disclaim any challenge to the previous ordinances.
. Nothing in Sections 1 and 12 of Florida's Declaration of Rights supports any claim based upon the facts alleged in Appellants’ complaint.- See Fla. Const. Art. I, §§ 1, 12 (1993).
