Build an ADU in Sharon.
New Hampshire's HB 577 lets you add one accessory dwelling unit on your single-family lot in Sharon — by-right. A detached ADU can be up to 950 sf, and ADU setbacks match your lot's single-family setbacks.
3 districts
Each district's single-family setbacks — which your ADU follows. The primary residential district is highlighted.
Verified against the official Sharon zoning ordinance · source · 2026-07-07
- Front
- 100 ft
- Side
- 50 ft
- Rear
- 50 ft
- Max coverage
- —
- Min lot
- 217,800 sf (~5.00 ac)
Sharon's only base district — all land not in the Wetland Conservation District (Art VII-A). Sharon has ONE set of town-wide dimensional standards (Art V applies to all districts): min lot 5 acres (217,800 sf); frontage >=300 ft on a street per RSA 674:41; depth >=125 ft;…
- Front
- —
- Side
- —
- Rear
- —
- Max coverage
- —
- Min lot
- —
Overlay covering all wetlands >=10,000 sf (Art VI-D); where superimposed, the most restrictive regulations apply (Art VI-B). No yard setbacks of its own — instead buffer distances measured FROM THE WETLAND BOUNDARY (Art VI-F table): buildings, additions and impervious…
- Front
- 150 ft
- Side
- 75 ft
- Rear
- 75 ft
- Max coverage
- —
- Min lot
- 326,700 sf (~7.50 ac)
Overlay: all areas east of NH Route 123 above 1,300 ft elevation, per the town 'Wetlands and Poorly Drained Soils' map (Art VIII-B); most restrictive regulations apply where superimposed. TIERED (conservative steep-slope tier recorded): if the building site is on a slope of…
Form-based and downtown districts may use build-to lines instead of fixed setbacks (shown as “—”); verify your parcel's district before you build.
Sharon 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 Sharon (Hillsborough County). A detached ADU can be up to 950 sf.
In Sharon's RR zone, ADUs follow the single-family setbacks: 100 ft front, 50 ft side, and 50 ft rear. Sharon has 3 zoning districts in total — see the full table below. Confirm your exact zone with the town.