This bill modifies the existing laws regarding Accessory Dwelling Units (ADUs) by expanding their definition and allowing for detached units to be constructed by right. The bill amends RSA 674:71 to include new definitions for "attached unit" and "detached unit," clarifying that ADUs can be located on the same lot as a single-family dwelling and may be constructed simultaneously with the principal dwelling. Additionally, the maximum square footage for ADUs is increased, with a stipulation that the total living space cannot exceed 950 square feet unless authorized by the municipality, and cannot be restricted to less than 750 square feet.

Furthermore, the bill mandates that municipalities must allow one detached ADU as a matter of right, removing previous language that suggested municipalities were not required to permit such units. It also establishes that municipalities cannot impose more stringent requirements on ADUs than those applicable to single-family homes, including regulations on parking and aesthetic standards. The bill includes provisions for owner occupancy, sewage disposal, and the conversion of existing structures into ADUs, ensuring that municipalities cannot deny the establishment of separate electrical services for these units. The act is set to take effect on July 1, 2025.

Statutes affected:
Introduced: 674:71, 674:73
As Amended by the House: 674:71, 674:73
Version adopted by both bodies: 674:71, 674:73
CHAPTERED FINAL VERSION: 674:71, 674:73