This bill modifies the definition and regulations surrounding Accessory Dwelling Units (ADUs) in New Hampshire. It expands the definition of ADUs to include detached units, allowing them to be located on a lot containing a single-family dwelling, and increases the maximum allowable square footage for these units. The bill introduces new definitions for "attached unit" and "detached unit," clarifying the distinctions between the two. Additionally, it mandates that municipalities permit one ADU as a matter of right in all zoning districts that allow single-family dwellings, without imposing additional requirements for lot size, setbacks, or other controls beyond those applicable to single-family homes.

Furthermore, the bill repeals and reenacts existing regulations regarding ADUs, ensuring that municipalities cannot impose more stringent requirements for septic systems than those required for single-family homes. It allows for the conversion of existing structures into ADUs, including detached garages, and prohibits municipalities from denying separate electrical service to these units. The legislation also stipulates that municipalities may require owner occupancy of one of the units but cannot limit the number of bedrooms in an ADU or require a familial relationship between occupants. 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