67 N.J. 151, 336 A.2d 713 (N.J. 1975)
Southern Burlington County NAACP v. Township of Mount Laurel, commonly called Mount Laurel I, is one of the most consequential state constitutional decisions in American land-use law.
May a developing municipality use its zoning power to exclude low- and moderate-income households, or must it affirmatively provide, through its land-use regulations, a realistic opportunity for its fair share of the regional need for low- and moderate-income housing?
Under the New Jersey Constitution's general welfare guarantee and the state zoning enabling act, a municipality may not exercise its zoning power to exclude categories of people—such as low- and moderate-income households—by making affordable housing economically or physically impossible. Developing municipalities carry an affirmative obligation to provide a realistic opportunity for the construction of low- and moderate-income housing sufficient to meet their fair share of the regional housing need.
The township's zoning ordinance was invalid to the extent it prevented a realistic opportunity for the construction of low- and moderate-income housing. The court held that developing municipalities must, through their land-use regulations, make possible their fair share of the region's need for such housing and remanded for Mount Laurel to revise its zoning consistent with this constitutional obligation.
Mount Laurel I established the foundational principle that exclusionary zoning violates state constitutional commitments to the general welfare and that municipalities have an affirmative duty to plan and zone for affordable housing. The decision reframed local land-use authority as a constitutional obligation with regional responsibility and catalyzed the inclusionary zoning movement. It also set the stage for further doctrinal development in Mount Laurel II (1983), which introduced stronger enforcement tools, including the builder's remedy, and prompted legislative and administrative mechanisms (such as COAH) to implement fair-share allocations. For law students, Mount Laurel I illustrates the power of state constitutional law to address structural inequality, the limits of municipal home rule when it conflicts with the general welfare, the role of courts in supervising land-use policy, and the interaction among courts, legislatures, and agencies in complex policy domains. It remains a touchstone for analyzing exclusionary zoning, regional planning, and the design of remedies in public law litigation.