NH · State directory
New Hampshire ADU rules
Statewide accessory dwelling unit law for New Hampshire.
Statewide ADU law
New Hampshire has state-level ADU legislation that applies across local jurisdictions. Local rules below may add requirements on top of state law.
- nhhfa.orgOfficial sourceLink outdatedADU Guide Municipalities (PDF)https://www.nhhfa.org/wp-content/uploads/2019/06/ADU_Guide_Municipalities.pdfView archived copy (Wayback Machine)
- nhhfa.orgOfficial sourceVerified July 2026https://www.nhhfa.org/housing-challenges-solutions/accessory-dwelling-units/
- nhmunicipal.orgOfficial sourceVerified July 2026https://www.nhmunicipal.org/town-city-article/make-room-daddy-new-law-accessory-dwelling-units
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