Build an ADU in Hart's Location.
New Hampshire's HB 577 lets you add one accessory dwelling unit on your single-family lot in Hart's Location — by-right. A detached ADU can be up to 950 sf, and ADU setbacks match your lot's single-family setbacks.
2 districts
Each district's single-family setbacks — which your ADU follows. The primary residential district is highlighted.
Verified against the official Hart's Location zoning ordinance · source · 2026-07-07
- Front
- 75 ft
- Side
- 25 ft
- Rear
- 25 ft
- Max coverage
- —
- Min lot
- 108,900 sf (~2.50 ac)
The whole town is a single rural and residential district (Art I.1). FRONT SETBACK IS MEASURED FROM THE ROAD CENTERLINE: no building or outbuilding may be closer than 75 ft from the center line of a road OR 25 ft from the edge of a right-of-way, WHICHEVER IS GREATER (Art…
- Front
- —
- Side
- —
- Rear
- —
- Max coverage
- —
- Min lot
- —
Overlay, not a base district: it is 'superimposed over another zoning district' and the more restrictive regulations apply (FPCD Ord sec 2:03). By ZBA special exception, residential yards may extend into the overlay (no structures), and flood-plain land may count toward the…
Form-based and downtown districts may use build-to lines instead of fixed setbacks (shown as “—”); verify your parcel's district before you build.
Hart's Location 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 Hart's Location (Carroll County). A detached ADU can be up to 950 sf.
In Hart's Location's RR zone, ADUs follow the single-family setbacks: 75 ft front, 25 ft side, and 25 ft rear. Hart's Location has 2 zoning districts in total — see the full table below. Confirm your exact zone with the town.