Build an ADU in Enfield.
New Hampshire's HB 577 lets you add one accessory dwelling unit on your single-family lot in Enfield — by-right. A detached ADU can be up to 950 sf, and ADU setbacks match your lot's single-family setbacks.
8 districts
Each district's single-family setbacks — which your ADU follows. The primary residential district is highlighted.
Verified against the official Enfield zoning ordinance · source · 2026-07-07
- Front
- 20 ft
- Side
- 15 ft
- Rear
- 15 ft
- Max coverage
- —
- Min lot
- 43,560 sf (~1.00 ac)
The village residential district (two mapped areas: Enfield Village/Mascoma Lake and Enfield Center/Route 4A). UTILITY TIER: min lot is 1 acre per dwelling unit with ON-LOT water and sewer (conservative value recorded = 43,560 sf), reduced to 1/4 acre (10,890 sf) per dwelling…
- Front
- 30 ft
- Side
- 20 ft
- Rear
- 20 ft
- Max coverage
- —
- Min lot
- 130,680 sf (~3.00 ac)
One-family, two-family, multi-family dwellings and manufactured homes permitted (401.2.A). Min lot 3 acres, and 3 acres PER dwelling unit (1 du = 3 ac, 2 du = 6 ac) — no utility/sewer reduction in this district (401.2.K).
- Front
- 30 ft
- Side
- 20 ft
- Rear
- 20 ft
- Max coverage
- —
- Min lot
- 217,800 sf (~5.00 ac)
Low-density rural/farm district. Min lot 5 acres, and 5 acres PER dwelling unit (1 du = 5 ac, 2 du = 10 ac) — no utility reduction (401.3.K). No structure nearer than 30 ft from any lot line contiguous to the street nor 20 ft from any lot boundary; max height 35 ft (exempts…
- Front
- 30 ft
- Side
- 20 ft
- Rear
- 20 ft
- Max coverage
- —
- Min lot
- 43,560 sf (~1.00 ac)
Mixed village business district; one-family and two-family dwellings, ADUs and manufactured homes on individual lots are permitted uses (401.4.A). UTILITY TIER: min lot 1 acre with on-lot water and sewer (conservative value recorded = 43,560 sf), reducible to 1/4 acre (10,890…
- Front
- —
- Side
- —
- Rear
- —
- Max coverage
- —
- Min lot
- 87,120 sf (~2.00 ac)
Five mapped C/I areas (Exit 16, Exit 15, Exit 14, Old Route 10, Baltic Mill — Secs 303.1-303.5). Min lot 2 acres (401.5.2.F). The ordinance states NO standard front/side/rear building setbacks or height limit for this district — the only siting rule is the 50-ft setback from…
- Front
- 30 ft
- Side
- 20 ft
- Rear
- 20 ft
- Max coverage
- 70% impervious
- Min lot
- 15,000 sf (~0.34 ac)
Compact mixed-use corridor district served by public water/sewer (Sec 401.6, revised — replaced part of the older CB/C-I scheme). Lot requirements (401.6.A table): road frontage 100 ft min, lot size 15,000 sf min, IMPERVIOUS SURFACE COVERAGE 70% MAX, residential density 12…
- Front
- 75 ft
- Side
- 50 ft
- Rear
- 50 ft
- Max coverage
- —
- Min lot
- 435,600 sf (~10.00 ac)
Single-family dwellings AND accessory dwelling units are permitted uses (402.C), unlike many towns' conservation zones. Density: dwellings limited to 1 dwelling unit per 10 ACRES (recorded as 435,600 sf; stated as a density cap, not literally a 'minimum lot size'), and no…
- Front
- 20 ft
- Side
- 10 ft
- Rear
- 10 ft
- Max coverage
- —
- Min lot
- 5,445 sf (~0.13 ac)
Parcel-specific district covering only the former DPW facility on Shedd Street (Tax Map 34, lots 60 & 61) — included for completeness. Residential dwellings must connect to municipal sewer and water (401.7.A); ADUs as defined in RSA 674:71-74 are accessory uses (401.7.D).
Form-based and downtown districts may use build-to lines instead of fixed setbacks (shown as “—”); verify your parcel's district before you build.
Enfield 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 Enfield (Grafton County). A detached ADU can be up to 950 sf.
In Enfield's R1 zone, ADUs follow the single-family setbacks: 20 ft front, 15 ft side, and 15 ft rear. Enfield has 8 zoning districts in total — see the full table below. Confirm your exact zone with the town.