City of Ladue v. Horn
Facts
Ladue's zoning ordinance designated certain districts as one-family residential and defined a family as one or more persons related by blood, marriage, or adoption occupying a dwelling as an individual housekeeping organization. Defendants, an unmarried man and woman, purchased and occupied a seven-bedroom house in such a district along with their children; they shared a bedroom, maintained a joint checking account for household expenses, ate and entertained together, and disciplined each other's children. Ladue demanded that they vacate because they were not a family under the ordinance, and when they refused the city sought injunctive relief. Defendants argued that their household functioned as the equivalent of a family and that the ordinance violated constitutional rights of association, privacy, and equal protection.
Issue
Whether a municipal zoning ordinance limiting occupancy in a single-family residential district to persons related by blood, marriage, or adoption is unconstitutional as applied to an unmarried couple and their children who live together as a household. The court also considered whether the ordinance was arbitrary under federal or Missouri constitutional principles.
Rule
A zoning ordinance is presumed valid, and courts defer to the legislative judgment unless the municipality acted arbitrarily. When a zoning classification based on biological or legal relationship among household members does not involve a fundamental right or suspect classification, it is constitutional if it is reasonable, not arbitrary, and rationally related to a permissible objective such as promoting the public health, safety, morals, or general welfare.
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If Maya and Jordan argue that the ordinance infringes their rights of privacy and intimate association and therefore must satisfy strict scrutiny, how should a court most likely rule under the majority opinion's approach?