Build an ADU in Eaton.
New Hampshire's HB 577 lets you add one accessory dwelling unit on your single-family lot in Eaton — 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 Eaton zoning ordinance · source · 2026-07-07
- Front
- 60 ft
- Side
- 30 ft
- Rear
- 30 ft
- Max coverage
- —
- Min lot
- 40,000 sf (~0.92 ac)
Principal residential district ('mainly a district of farms, residences and woodlands'); dwellings of up to 2 units permitted by right (Art V.A.1.e). FRONT SETBACK IS MEASURED FROM THE CENTER OF THE HIGHWAY: every dwelling/building must be at least 60 ft from the centerline…
- Front
- 60 ft
- Side
- 30 ft
- Rear
- 30 ft
- Max coverage
- —
- Min lot
- 40,000 sf (~0.92 ac)
Mixed village district: all RR uses plus neighborhood stores, offices, restaurants and other small-scale commercial (Art V.B.1); new structures must protect scenic views and historic character. Dimensional standards are the same town-wide Article IV provisions — front 60 ft…
- Front
- 60 ft
- Side
- 30 ft
- Rear
- 30 ft
- Max coverage
- —
- Min lot
- 40,000 sf (~0.92 ac)
Commercial/light-industrial corridor along Route 153; ALL uses permitted in the Village and Rural Residential districts are also permitted here (Art V.D.1), so residential is allowed. Same town-wide Article IV dimensional standards: front 60 ft from road centerline, 30 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.
Eaton 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 Eaton (Carroll County). A detached ADU can be up to 950 sf.
In Eaton's RR zone, ADUs follow the single-family setbacks: 60 ft front, 30 ft side, and 30 ft rear. Eaton has 3 zoning districts in total — see the full table below. Confirm your exact zone with the town.