Build an ADU in Surry.
New Hampshire's HB 577 lets you add one accessory dwelling unit on your single-family lot in Surry — 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 Surry zoning ordinance · source · 2026-07-07
- Front
- 50 ft
- Side
- 15 ft
- Rear
- 15 ft
- Max coverage
- —
- Min lot
- 87,120 sf (~2.00 ac)
Principal residential district: 'predominantly residential while preserving the rural character of the community' (Art IV.A.2), covering land to 300 ft depth from the centerline of all public streets not otherwise assigned to VR, C/I or GEN (Art IV.B.2).
- Front
- 30 ft
- Side
- 10 ft
- Rear
- 10 ft
- Max coverage
- —
- Min lot
- 43,560 sf (~1.00 ac)
Traditional NH village district; single-unit dwellings and presite-built housing are permitted by right, duplex/ADU and multi-unit by special exception (Art V.A). Min lot 1 acre = 43,560 sf; min lot width 150 ft (over full lot depth); min lot depth 200 ft; frontage 150 ft;…
- Front
- 50 ft
- Side
- 25 ft
- Rear
- 25 ft
- Max coverage
- —
- Min lot
- 130,680 sf (~3.00 ac)
Commercial/industrial district along Route 12 and Old Summit Road, land to 400 ft depth from the centerline (Art IV.B.3). Min lot 3 acres = 130,680 sf; min lot width 300 ft; min lot depth 300 ft; frontage 300 ft; max 3 stories / 40 ft (Art VI table).
- Front
- 50 ft
- Side
- 15 ft
- Rear
- 15 ft
- Max coverage
- —
- Min lot
- 87,120 sf (~2.00 ac)
Rural/larger-lot residential + agricultural district: all remaining land not otherwise defined, including both sides of Farm Road, Joslin Road, Webster Road, Merriam Road and all class VI roads (Art IV.A.4, IV.B.4).
Form-based and downtown districts may use build-to lines instead of fixed setbacks (shown as “—”); verify your parcel's district before you build.
Surry 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 Surry (Cheshire County). A detached ADU can be up to 950 sf.
In Surry's RR zone, ADUs follow the single-family setbacks: 50 ft front, 15 ft side, and 15 ft rear. Surry has 4 zoning districts in total — see the full table below. Confirm your exact zone with the town.