scale map showing the divisions of a piece of land

In the United States, a plat (/plæt/[1] or /plɑːt/)[2] (plan) is a map that shows the parts of a piece of land for where houses and buildings will be built.

A plat map that shows the location of a lot for sale

After filing a plat, legal descriptions can start using block and lot-numbers instead of calling them portions of sections.[3]


  1. American Heritage Dictionary, 3rd ed., s.v. "plat."
  2. from a letter published in The Gentleman's Magazine, Volume 72, Part 1, London, 1802 [1]: "... many attorneys ought to be whipt for not knowing how to spell; that plot a conspiracy and plat a piece of ground were pronounced exactly alike ..."
  3. "City of Corpus". Retrieved 2012-12-13.