Build an ADU in Barnstead.
New Hampshire's HB 577 lets you add one accessory dwelling unit on your single-family lot in Barnstead — by-right. A detached ADU can be up to 950 sf, and ADU setbacks match your lot's single-family setbacks.
4 districts
Each district's single-family setbacks — which your ADU follows. The primary residential district is highlighted.
Verified against the official Barnstead zoning ordinance · source · 2026-07-07
- Front
- 50 ft
- Side
- 30 ft
- Rear
- 30 ft
- Max coverage
- —
- Min lot
- 87,120 sf (~2.00 ac)
Default/principal district: all land not in the Industrial-Commercial, Village or Suburban districts is Residential-Agricultural (Sec 14-7). Front 50 ft measured from the RIGHT-OF-WAY (town-wide Sec 4-2.04 'Buildings must set back fifty (50) feet from a right-of-way';…
- Front
- 50 ft
- Side
- 30 ft
- Rear
- 30 ft
- Max coverage
- —
- Min lot
- 87,120 sf (~2.00 ac)
Consists of major subdivisions of 4+ lots approved before 3/9/1999 comprised of NONCONFORMING lots (14-6.02); all lots in the Suburban District are per se nonconforming under Sec 4-1 (noted in Art 3). New/conforming lots follow the town-wide standards recorded here (front 50…
- Front
- 50 ft
- Side
- 50 ft
- Rear
- 50 ft
- Max coverage
- —
- Min lot
- 87,120 sf (~2.00 ac)
Two mapped village districts: Barnstead Center (Maps 19-21 east of the Rt. Front: Sec 14-5.03 requires buildings set back from the road at least the AVERAGE of the two buildings on either side (contextual, no fixed number); the town-wide Sec 4-2.04 50-ft right-of-way setback…
- Front
- 110 ft
- Side
- 50 ft
- Rear
- 50 ft
- Max coverage
- —
- Min lot
- 87,120 sf (~2.00 ac)
Route 28 corridor from the Pittsfield town line north to the Suncook River, to a depth of max 500 ft from the highway right-of-way, plus Tax Map 7 Lots 1, 1-1 and 4 (Sec 14-4). Front: all buildings must be set back at least 110 FT FROM THE PROPERTY LINE ABUTTING ROUTE 28…
Form-based and downtown districts may use build-to lines instead of fixed setbacks (shown as “—”); verify your parcel's district before you build.
Barnstead ADU FAQ
Yes. Under NH RSA 674:71-73 (HB 577), one accessory dwelling unit is allowed by-right on single-family lots statewide, including Barnstead (Belknap County). A detached ADU can be up to 950 sf.
In Barnstead's RA zone, ADUs follow the single-family setbacks: 50 ft front, 30 ft side, and 30 ft rear. Barnstead has 4 zoning districts in total — see the full table below. Confirm your exact zone with the town.