Build an ADU in Jackson.
New Hampshire's HB 577 lets you add one accessory dwelling unit on your single-family lot in Jackson — 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 Jackson zoning ordinance · source · 2026-07-07
- Front
- 50 ft
- Side
- 25 ft
- Rear
- 25 ft
- Max coverage
- —
- Min lot
- —
Principal single-family district: all land in Jackson not in the Village District (4.2.2). Also 50 ft from the near bank of any year-round stream or body of water (4.3.1.2.3), and septic leach fields 100 ft from year-round streams/water bodies, 150 ft in excessively drained…
- Front
- 50 ft
- Side
- 25 ft
- Rear
- 25 ft
- Max coverage
- —
- Min lot
- —
Land within 500 ft either side of the center line of Routes 16 and 16A plus all land between those routes (4.2.1). FRONT 50 ft IS MEASURED FROM THE CENTER LINE of the traveled way of any public or private road (4.3.2.2.1); special Route 16A rule: 50 ft from Route 16A with…
- Front
- —
- Side
- —
- Rear
- —
- Max coverage
- —
- Min lot
- —
OVERLAY district, not a base zone — where it conflicts with the underlying district the more restrictive applies (5.4).
- Front
- —
- Side
- —
- Rear
- —
- Max coverage
- —
- Min lot
- —
OVERLAY district (added 3/10/2022) protecting wellhead/aquifer areas; underlying district dimensional standards apply. No setback or lot-size standards of its own, and no hard coverage cap — but any use that will render impervious MORE THAN 15% OR 2,500 SQ FT of any lot…
Form-based and downtown districts may use build-to lines instead of fixed setbacks (shown as “—”); verify your parcel's district before you build.
Jackson 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 Jackson (Carroll County). A detached ADU can be up to 950 sf.
In Jackson's RR zone, ADUs follow the single-family setbacks: 50 ft front, 25 ft side, and 25 ft rear. Jackson has 4 zoning districts in total — see the full table below. Confirm your exact zone with the town.