Build an ADU in Gilford.
New Hampshire's HB 577 lets you add one accessory dwelling unit on your single-family lot in Gilford — by-right. A detached ADU can be up to 950 sf, and ADU setbacks match your lot's single-family setbacks.
8 districts
Each district's single-family setbacks — which your ADU follows. The primary residential district is highlighted.
Verified against the official Gilford zoning ordinance · source · 2026-07-04
- Front
- 35 ft
- Side
- 25 ft
- Rear
- 25 ft
- Max coverage
- 25% impervious
- Min lot
- 43,560 sf (~1.00 ac)
1 acre. Width 150 ft. Surveyor-absent front 65 ft.
- Front
- 50 ft
- Side
- 25 ft
- Rear
- 25 ft
- Max coverage
- 25% impervious
- Min lot
- 87,120 sf (~2.00 ac)
2 acres. Width 150 ft.
- Front
- 50 ft
- Side
- 25 ft
- Rear
- 25 ft
- Max coverage
- 25% impervious
- Min lot
- 43,560 sf (~1.00 ac)
1 acre. Width 150 ft.
- Front
- 50 ft
- Side
- 25 ft
- Rear
- 25 ft
- Max coverage
- 25% impervious
- Min lot
- 87,120 sf (~2.00 ac)
2 acres. Width 150 ft. NOT Industrial.
- Front
- 50 ft
- Side
- 25 ft
- Rear
- 25 ft
- Max coverage
- 75% impervious
- Min lot
- 43,560 sf (~1.00 ac)
1 acre. Width 100 ft.
- Front
- 50 ft
- Side
- 25 ft
- Rear
- 25 ft
- Max coverage
- 75% impervious
- Min lot
- 43,560 sf (~1.00 ac)
1 acre. Width 150 ft. Allows residential.
- Front
- 35 ft
- Side
- 25 ft
- Rear
- 25 ft
- Max coverage
- 75% impervious
- Min lot
- 43,560 sf (~1.00 ac)
1 acre. Width 100 ft.
- Front
- 50 ft
- Side
- 25 ft
- Rear
- 25 ft
- Max coverage
- 75% impervious
- Min lot
- 43,560 sf (~1.00 ac)
1 acre. Width 100 ft.
Form-based and downtown districts may use build-to lines instead of fixed setbacks (shown as “—”); verify your parcel's district before you build.
Gilford 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 Gilford (Belknap County). A detached ADU can be up to 950 sf.
In Gilford's SFR zone, ADUs follow the single-family setbacks: 35 ft front, 25 ft side, and 25 ft rear. Gilford has 8 zoning districts in total — see the full table below. Confirm your exact zone with the town.