Accessory Structures in Nashua, NH (2026)
3 verified accessory structures rules for Nashua, New Hampshire, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Nashua accessory dwelling units are capped at 980 square feet (1,200 if built within an existing footprint), require owner-occupancy, extra parking, and a covenant filed with the Hillsborough County Registry of Deeds before a building permit issues.
Nashua ADU Permit and Size Rules
Some RestrictionsNashua Revised Ordinances § 190-32
The owner of the property shall provide the City of Nashua with a covenant for filing with the Hillsborough County registry of deeds, along with the appropriate filing fees. The covenant shall read substantially as follows: "_____of _____ covenants and agrees that the property located at _____ contains an accessory dwelling as defined by the City of Nashua Land Use Code (§ 190-264 of Article X...
ADU Owner Occupancy
Nashua's accessory dwelling unit ordinance requires the property owner to live in either the primary house or the ADU as their principal residence, backed by a recorded covenant filed with the county registry of deeds.
Nashua ADU Owner-Occupancy Rule
Some RestrictionsNashua Revised Ordinances § 190-32(B)(5)
The owner of the property must occupy either the primary or accessory dwelling unit as the owner's principal place of residence. (6) The owner of the property shall provide the City of Nashua with a covenant for filing with the Hillsborough County registry of deeds, along with the appropriate filing fees. The covenant shall read substantially as follows: "_____of _____ covenants and agrees ...
Shed & Carport Rules
Nashua charges a flat $30 minimum permit fee for residential sheds under 200 square feet, billed as miscellaneous equipment rather than per-square-foot new construction; the city requires a building permit before any work begins.
Nashua Shed Permit Fees by Size
Some RestrictionsNashua Revised Ordinances § 105-28A(11)
Minimum fee for miscellaneous equipment (each), excluding the application fee, where not otherwise provided for by this section [for example: residential antennas, small sheds (less than 200 square feet), or construction trailers] or as deemed appropriate by the Building Official or his or her designee: ... Residential: $30. ... Commercial: $50.