Build an ADU in Bennington.
New Hampshire's HB 577 lets you add one accessory dwelling unit on your single-family lot in Bennington — 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 Bennington zoning ordinance · source · 2026-07-07
- Front
- 50 ft
- Side
- 30 ft
- Rear
- 30 ft
- Max coverage
- 30% impervious
- Min lot
- 87,120 sf (~2.00 ac)
Default district: all land not in the Industrial, Village, or Commercial/Recreation districts (Art VI.B.4). Min lot 2 acres; frontage 200 ft; max height 35 ft (Art VII.C). Front setback measured from the street right-of-way line (Art XVII.M).
- Front
- 30 ft
- Side
- 15 ft
- Rear
- 15 ft
- Max coverage
- 30% impervious
- Min lot
- 21,780 sf (~0.50 ac)
Compact mixed-use center: single-family residences, duplexes, multifamily, retail, offices, restaurants, home businesses permitted (Art VI.D.1). Min lot 1/2 acre (21,780 sf); frontage 100 ft; max height 35 ft (Art VII.C).
- Front
- 50 ft
- Side
- 30 ft
- Rear
- 30 ft
- Max coverage
- 30% impervious
- Min lot
- 87,120 sf (~2.00 ac)
Recreation-oriented district near Crotched Mountain (Art VI.B.3): single-family residences, duplexes, condominiums, cluster development, hotels/motels, restaurants, recreation facilities permitted (Art VI.D.3).
- Front
- 100 ft
- Side
- 100 ft
- Rear
- 100 ft
- Max coverage
- 30% impervious
- Min lot
- 217,800 sf (~5.00 ac)
Manufacturing, warehousing, distribution, research, retail, hydro-energy (Art VI.D.4). Min lot 5 acres; frontage 500 ft; max height 35 ft (Art VII.C). 30% lot coverage town-wide (Art VII.E, impervious-inclusive).
Form-based and downtown districts may use build-to lines instead of fixed setbacks (shown as “—”); verify your parcel's district before you build.
Bennington 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 Bennington (Hillsborough County). A detached ADU can be up to 950 sf.
In Bennington's R/A zone, ADUs follow the single-family setbacks: 50 ft front, 30 ft side, and 30 ft rear. Bennington has 4 zoning districts in total — see the full table below. Confirm your exact zone with the town.