Build an ADU in Brookfield.
New Hampshire's HB 577 lets you add one accessory dwelling unit on your single-family lot in Brookfield — 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 Brookfield zoning ordinance · source · 2026-07-07
- Front
- 50 ft
- Side
- 40 ft
- Rear
- 40 ft
- Max coverage
- —
- Min lot
- 217,800 sf (~5.00 ac)
The entire town is zoned Residential-Agricultural except the REC-1 tract (Art II intro). FRONT IS MEASURED FROM THE EDGE OF THE RIGHT-OF-WAY: no structure or part thereof within 50 ft of the edge of any right-of-way, within 40 ft of the side and rear lot lines, or within 75…
- Front
- 50 ft
- Side
- 40 ft
- Rear
- 40 ft
- Max coverage
- —
- Min lot
- 435,600 sf (~10.00 ac)
Single mapped tract south of Mountain Road (Moose Mountains recreational area; metes and bounds in Appendix A). Min lot 10 acres (435,600 sf); lot width at the right-of-way at least 250 ft and lot depth at least 200 ft; Class VI road frontage does not qualify (II.B.4.a-b).
- Front
- 50 ft
- Side
- 40 ft
- Rear
- 40 ft
- Max coverage
- —
- Min lot
- 43,560 sf (~1.00 ac)
OVERLAY, not a base district: comprises lands within Area RA-2 on the Workforce Housing Overlay District Map dated March 10, 2009; permits higher-density single-family and multi-family WORKFORCE housing (RSA 674:58 income-qualified) than the underlying RA-1 (II.C.1).
Form-based and downtown districts may use build-to lines instead of fixed setbacks (shown as “—”); verify your parcel's district before you build.
Brookfield 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 Brookfield (Carroll County). A detached ADU can be up to 950 sf.
In Brookfield's RA-1 zone, ADUs follow the single-family setbacks: 50 ft front, 40 ft side, and 40 ft rear. Brookfield has 3 zoning districts in total — see the full table below. Confirm your exact zone with the town.