Build an ADU in New Hampton.
New Hampshire's HB 577 lets you add one accessory dwelling unit on your single-family lot in New Hampton — by-right. A detached ADU can be up to 950 sf, and ADU setbacks match your lot's single-family setbacks.
9 districts
Each district's single-family setbacks — which your ADU follows. The primary residential district is highlighted.
Verified against the official New Hampton zoning ordinance · source · 2026-07-07
- Front
- 35 ft
- Side
- 20 ft
- Rear
- 20 ft
- Max coverage
- 20% impervious
- Min lot
- 43,560 sf (~1.00 ac)
Default/primary district: covers ALL town property not in another district; single-family dwellings and manufactured homes permitted by right. Front 35 ft measured from any public or private road RIGHT-OF-WAY (Art IV.B.4.ii).
- Front
- 35 ft
- Side
- 50 ft
- Rear
- 50 ft
- Max coverage
- 50% impervious
- Min lot
- 43,560 sf (~1.00 ac)
Commercial/light-industrial district near I-93 and Route 132N; no residential base uses listed. Front: 75 ft from the NH Route 132N right-of-way (50 ft of it a perpetual native-vegetation buffer); otherwise 35 ft from any other public or private road right-of-way (IV.C.4.ii).
- Front
- 35 ft
- Side
- 25 ft
- Rear
- 35 ft
- Max coverage
- 50% impervious
- Min lot
- 43,560 sf (~1.00 ac)
Route 104/Exit 23 corridor district; principal structures may themselves be mixed use (residential apartments over non-residential). Front: 75 ft from the Route 104 right-of-way for ANY use (50 ft of it a perpetual buffer); otherwise 35 ft from any other public or private…
- Front
- 35 ft
- Side
- 25 ft
- Rear
- 35 ft
- Max coverage
- 40% impervious
- Min lot
- 43,560 sf (~1.00 ac)
Business Commercial District on Route 104; single-family dwellings permitted by right, ADU permitted by right. Front: 75 ft from the Route 104 right-of-way (50 ft of it a perpetual buffer); otherwise 35 ft from any other public or private road right-of-way (IV.E.4.ii).
- Front
- 35 ft
- Side
- 25 ft
- Rear
- 35 ft
- Max coverage
- 30% impervious
- Min lot
- 43,560 sf (~1.00 ac)
North side of Route 104 from Town House Road east to the Meredith town line; single-family dwellings permitted by right, ADU permitted by right. Front: 100 ft from the Route 104 right-of-way (50 ft of it a perpetual buffer); otherwise 35 ft from any other public or private…
- Front
- 30 ft
- Side
- 15 ft
- Rear
- 50 ft
- Max coverage
- 50% impervious
- Min lot
- 43,560 sf (~1.00 ac)
Former Village Precinct area (residences, public buildings, New Hampton School); single-family detached dwellings permitted by right. Setback table (IV.G.3.i): front 30 ft, side 15 ft, rear 50 ft; max height 35 ft Maximum lot coverage: 'Impervious surfaces shall not exceed…
- Front
- 35 ft
- Side
- 20 ft
- Rear
- 20 ft
- Max coverage
- —
- Min lot
- 87,120 sf (~2.00 ac)
OVERLAY protecting the Pemigewasset River corridor (area within 500 ft of the river's normal high-water mark); permitted uses are those of the underlying district. Structures (except septic) set back 200 ft horizontal from the river's normal high-water mark (IV.H.2.v); septic…
- Front
- —
- Side
- —
- Rear
- —
- Max coverage
- —
- Min lot
- 87,120 sf (~2.00 ac)
OVERLAY protecting the Lake Waukewan public drinking-water supply; applies only to land (or the portion of a lot) draining to Lake Waukewan (mapped; Selectmen determine applicability). Minimum lot area is two (2) acres (87,120 sf) (IV.I.3.i); where dwelling units are created…
- Front
- —
- Side
- —
- Rear
- —
- Max coverage
- —
- Min lot
- —
OVERLAY superimposed over the conventional districts; adopted under RSA 674:16/21/56. In the current March 2026 ordinance this content lives in Appendix A (Flood Hazard Overlay District), NOT in a lettered Article IV section.
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 Hampton 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 Hampton (Belknap County). A detached ADU can be up to 950 sf.
In New Hampton's GR zone, ADUs follow the single-family setbacks: 35 ft front, 20 ft side, and 20 ft rear. New Hampton has 9 zoning districts in total — see the full table below. Confirm your exact zone with the town.