relative to modifying the definition of ADUs.

HB 577 modifies the legal definition of Accessory Dwelling Units (ADUs), which are secondary housing units like backyard cottages or converted garages on residential properties. The bill became law on July 1, 2025, after being signed by Governor Ayotte on July 15, 2025. The provided context does not specify the exact changes to the definition or the key mechanisms of the bill. Therefore, no concrete policy changes or affected parties can be detailed from the available information. This summary is limited to the bill's title and status, as the context lacks specifics about the definition modifications.