What is a Plat? Zoning Definition

A plat is an official map that depicts how a piece of land is divided into individual lots, blocks, streets, and other features. When a property owner subdivides land, the resulting plat must be reviewed and approved by the local planning authority and then recorded with the county recorder or register of deeds. Once recorded, the plat becomes a legal document that defines the boundaries and dimensions of each lot.

There are several types of plats. A preliminary plat is a draft map submitted for initial review, showing the proposed layout of lots, roads, and utilities. A final plat is the precise, surveyed version submitted for formal approval and recording. A replat changes the lot configuration of a previously platted area. An amending plat makes minor corrections to an existing recorded plat without changing the overall layout.

Plats contain important information for property owners and buyers, including lot dimensions, easement locations, right-of-way widths, flood zones, and building setback lines. They are prepared by licensed surveyors and must meet specific standards for accuracy and content set by local and state regulations. Title companies, lenders, and municipalities rely on recorded plats to verify legal descriptions and property boundaries.

If you are buying property in a subdivision, reviewing the recorded plat is essential. It will tell you the exact boundaries of your lot, the location of utility and drainage easements that may restrict where you can build, and the width of streets and right-of-way areas. Plats are typically available from the county recorder's office or through online GIS portals.