Williamson County Regional Planning Commission v. Hamilton Bank of Johnson City  Williamson County Regional Planning Commission v. Hamilton Bank of Johnson City, 473 U.S. 172 (1985), was a U.S. Supreme Court case that limited access to federal court for plaintiffs alleging uncompensated takings of private property under the Fifth Amendment. In June, 2019, the holding of this case was overruled by the Court's decision in "Knick v. Township of Scott, Pennsylvania". In 1973, the Williamson County (Tennessee) Regional Planning Commission approved a preliminary plat for a residential subdivision, including a golf course, open space, and 736 residential units. Four years later, after the developer had incurred substantial costs installing infrastructure and had received final approval for the construction of the first 212 units, the county changed its zoning ordinance and adopted more stringent density limits. Upon submission of a revised preliminary plat in 1980, the Commission raised eight objections to the development based on non-compliance with the county's then-existing zoning and development regulations. Following an administrative appeal, the County Board of Zoning Appeals ruled that the Commission should have applied the regulations and zoning that were in effect in 1973, when the original preliminary plat was filed. However, the Commission declined to follow this directive, and once again disapproved the revised plat. Hamilton Bank, which had acquired the undeveloped property through foreclosure, filed suit in federal court, alleging that the Commission's actions amounted to a regulatory taking of its property without just compensation. Alternatively, Hamilton argued that the Agency's actions violated the Due Process Clause of the 14th Amendment and should be set aside. After trial, a jury found that the Commission's regulations violated the Just Compensation Clause of the Fifth Amendment, and awarded Hamilton $350,000 in compensation. The District Court issued an injunction requiring the Commission to apply its 1973 regulations to Hamilton's development plat, but set aside award of compensation on the grounds that Hamilton's loss of the beneficial use of the property had been only temporary. The Sixth Circuit Court of Appeals reversed and reinstated the jury's award, holding that just compensation was mandated by the Fifth Amendment when land-use regulations deprive an owner of all economically viable use of property, for the period during which they are in effect. The Supreme Court granted certiorari to determine whether monetary compensation is required when an owner is temporarily deprived of the beneficial use of land by operation of government regulations, but it did not resolve that issue. Justice Blackmun, writing for the Court, held that Hamilton Bank's takings claim was not ripe for adjudication.