Free US Law Dictionary

Nonconforming Use

A type of zoning variance where a parcel of land may be given an exception from current zoning ordinances due to improvements made by a prior owner or before the current zoning ordinances made the desired use non-conforming under local law.

Secondary suites are commonly permitted as a non-conforming use in the zoning district they are located in because the suite was developed prior to the zoning ordinance coming into effect.