Build an ADU in New Ipswich.
New Hampshire's HB 577 lets you add one accessory dwelling unit on your single-family lot in New Ipswich — by-right. A detached ADU can be up to 950 sf, and ADU setbacks match your lot's single-family setbacks.
6 districts
Each district's single-family setbacks — which your ADU follows. The primary residential district is highlighted.
Verified against the official New Ipswich zoning ordinance · source · 2026-07-07
- Front
- 30 ft
- Side
- 20 ft
- Rear
- 20 ft
- Max coverage
- —
- Min lot
- 87,120 sf (~2.00 ac)
Default district: 'the remaining area of the town outside the Village District' (Art VI.A); single-family and two-family dwellings permitted by right (Art VI.B via Art IV.B). Min lot 2 acres; FRONT SETBACK 30 FT IS MEASURED FROM THE BOUNDARY OF THE ROAD RIGHT-OF-WAY (not…
- Front
- 30 ft
- Side
- 20 ft
- Rear
- 20 ft
- Max coverage
- —
- Min lot
- 43,560 sf (~1.00 ac)
Historic village centers (Bank Village, Smith Village; Art XI). Min lot 1 acre; front setback 30 ft measured from boundary of road right-of-way; side/rear 20 ft; frontage 200 ft; max height 45 ft No lot-coverage cap in ordinance.
- Front
- 30 ft
- Side
- 20 ft
- Rear
- 20 ft
- Max coverage
- —
- Min lot
- 43,560 sf (~1.00 ac)
New Ipswich Village center (Art XI). Identical dimensional controls to Village District I - the Art XII.A table has a single 'Village Districts I & II' column: 1 acre min lot, front 30 ft from ROW boundary, side/rear 20 ft, frontage 200 ft, height 45 ft, no coverage cap.
- Front
- 30 ft
- Side
- 30 ft
- Rear
- 30 ft
- Max coverage
- —
- Min lot
- 43,560 sf (~1.00 ac)
Commercial table (p 26) uses ONE structure setback - 30 ft from property line or edge of right-of-way - applying to all yards (no separate front/side/rear). Min lot 1 acre; frontage on access road 100 ft; parking lots 10 ft from property line/ROW; structures, parking and…
- Front
- 30 ft
- Side
- 30 ft
- Rear
- 30 ft
- Max coverage
- —
- Min lot
- 87,120 sf (~2.00 ac)
Single 30 ft structure setback from property line or edge of right-of-way (all yards). Min lot 2 acres; frontage on access road 200 ft; parking lots 10 ft from property line/ROW; structures, parking and driveways 50 ft from any Village I/II or Rural district boundary;…
- Front
- 30 ft
- Side
- 30 ft
- Rear
- 30 ft
- Max coverage
- —
- Min lot
- 87,120 sf (~2.00 ac)
Identical dimensional column to General Commercial: single 30 ft structure setback from property line or edge of right-of-way; min lot 2 acres; frontage on access road 200 ft; parking 10 ft; 50 ft from Village I/II or Rural district boundaries; driveway 10 ft; height 45 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.
New Ipswich 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 New Ipswich (Hillsborough County). A detached ADU can be up to 950 sf.
In New Ipswich's R zone, ADUs follow the single-family setbacks: 30 ft front, 20 ft side, and 20 ft rear. New Ipswich has 6 zoning districts in total — see the full table below. Confirm your exact zone with the town.