Section 674:19 Applicability of Zoning Ordinance.
A zoning ordinance adopted under RSA 674:16 shall not apply to existing structures or to the existing use of any building. It shall apply to any alteration of a building for use for a purpose or in a manner which is substantially different from the use to which it was put before alteration.
Source. 1983, 447:1, eff. Jan. 1, 1984.