structural:summarization
Agins v. Tiburon

The application of a general zoning law to particular property effects a taking if the ordinance does not substantially advance legitimate state interests, see Nectow v. Cambridge, 277 U.S. 183, 188 (1928), or denies an owner economically viable use of his land, see Penn Central Transp. Co. v. New York City, 438 U.S. 104, 138, n. 36 (1978). The determination that governmental action constitutes a taking is, in essence, a determination that the public at large, rather than a single owner, must bear the burden of an exercise of state power in the public interest. Although no precise rule determines when property has been taken, see Kaiser Aetna v. United States, 444 U.S. 164 (1979), the question necessarily requires a weighing of private and public interests. In this case, the law confers a reciprocal benefit: it benefits all landowners, serving the city's interest in assuring careful and orderly development of residential property with provision for open-space areas.