Build an ADU in Tuftonboro.
New Hampshire's HB 577 lets you add one accessory dwelling unit on your single-family lot in Tuftonboro — by-right. A detached ADU can be up to 950 sf, and ADU setbacks match your lot's single-family setbacks.
6 districts
Each district's single-family setbacks — which your ADU follows. The primary residential district is highlighted.
Verified against the official Tuftonboro zoning ordinance · source · 2026-07-06
- Front
- 30 ft
- Side
- 25 ft
- Rear
- 25 ft
- Max coverage
- 20% impervious
- Min lot
- 87,120 sf (~2.00 ac)
Min lot 2 acres (87,120 sf). Min continuous frontage 150 ft, min depth 200 ft, max building height 35 ft, min open space 60%. Frontage is road frontage except waterfront lots (measured in 50-ft increments).
- Front
- 30 ft
- Side
- 25 ft
- Rear
- 25 ft
- Max coverage
- 25% impervious
- Min lot
- 43,560 sf (~1.00 ac)
Min lot 1 acre (43,560 sf). Min continuous frontage 100 ft, min depth 150 ft, max building height 35 ft, min open space 50%. May be provided with town water/sewer.
- Front
- 50 ft
- Side
- 20 ft
- Rear
- 25 ft
- Max coverage
- 20% impervious
- Min lot
- 43,560 sf (~1.00 ac)
Min lot 1 acre (43,560 sf). Min continuous frontage 150 ft, min depth 200 ft, max building height 35 ft, min open space 60%. Waterfront frontage measured in 50-ft increments.
- Front
- 50 ft
- Side
- 20 ft
- Rear
- 40 ft
- Max coverage
- 40% impervious
- Min lot
- 43,560 sf (~1.00 ac)
Min lot 1 acre (43,560 sf). Min continuous frontage 100 ft, min depth 150 ft, max building height 35 ft, min open space 20%.
- Front
- 50 ft
- Side
- 40 ft
- Rear
- 50 ft
- Max coverage
- 10% impervious
- Min lot
- 174,240 sf (~4.00 ac)
Min lot 4 acres (174,240 sf). Min continuous frontage 250 ft, min depth 200 ft, max building height 35 ft, min open space 75%.
- Front
- 50 ft
- Side
- 20 ft
- Rear
- 25 ft
- Max coverage
- 20% impervious
- Min lot
- 43,560 sf (~1.00 ac)
Min lot 1 acre (43,560 sf). Min continuous frontage 150 ft, min depth 200 ft, max building height 35 ft, min open space 60%.
Form-based and downtown districts may use build-to lines instead of fixed setbacks (shown as “—”); verify your parcel's district before you build.
Tuftonboro 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 Tuftonboro (Carroll County). A detached ADU can be up to 950 sf.
In Tuftonboro's LDR zone, ADUs follow the single-family setbacks: 30 ft front, 25 ft side, and 25 ft rear. Tuftonboro has 6 zoning districts in total — see the full table below. Confirm your exact zone with the town.