239 U.S. 394 (1915), United States Supreme Court
Hadacheck v. Sebastian is a foundational Supreme Court decision in the early development of regulatory takings doctrine and land-use regulation.
Does a municipal ordinance that prohibits brick manufacturing in a designated district, thereby substantially diminishing the value of a brickyard owner's property and foreclosing its most profitable use, violate the Fourteenth Amendment's Due Process or Equal Protection Clauses or amount to an unconstitutional taking?
Under the police power, a state or municipality may reasonably prohibit land uses deemed harmful to public health, safety, morals, or general welfare, and such regulations do not violate due process or equal protection—and do not constitute a taking requiring compensation—merely because they significantly diminish property value, so long as the restrictions are not arbitrary, discriminatory, or confiscatory and bear a real and substantial relation to the public welfare.
No. The ordinance is a valid exercise of the police power. Prohibiting brick manufacturing in the designated district is neither an unconstitutional deprivation of property without due process nor a denial of equal protection, and it does not constitute a compensable taking even though it severely reduces the property's value.
Hadacheck is a cornerstone of early regulatory takings jurisprudence, reinforcing the principle—drawn from cases like Mugler v. Kansas—that government can proscribe harmful or incompatible uses without compensating the owner, even where value loss is significant. It foreshadows modern land-use and zoning law, paving the way for Village of Euclid v. Ambler Realty Co.'s broader acceptance of zoning. For students, Hadacheck illustrates: (1) the noxious use rationale; (2) the idea that severe diminution alone does not equal a taking; (3) the reasonableness and nonarbitrariness tests under substantive due process and equal protection; and (4) the limited protection for preexisting uses in the face of evolving urban conditions. The case remains a crucial counterpoint to later regulatory takings decisions such as Pennsylvania Coal v. Mahon, Penn Central, and Lucas, which refine the boundaries of when regulation goes "too far."