MADBURY, NEW HAMPSHIRE · STRAFFORD COUNTY
BUILD AN ADU IN MADBURY.
✓ Allowed by-right · RSA 674:71-73
New Hampshire's HB 577 lets you add one accessory dwelling unit on your single-family lot in Madbury — by-right. A detached ADU can be up to 950 sf, and ADU setbacks match your lot's single-family setbacks.
Madbury setback reference · R zone
- Front setback
- 35 ft
- Side setback
- 25 ft
- Rear setback
- 30 ft
- Max lot coverage
- 20%
- Min lot size
- 87,120 sf (~2.00 ac)
- Max detached ADU
- 950 sf
Figures reflect Madbury's R residential zone and are a planning aid — your parcel's exact zone and overlays (wetland, shoreland) are verified before we lock your price.
Confirm your zoning
Madbury ADU FAQ
Can I build an ADU in Madbury, NH?
Yes. Under NH RSA 674:71-73 (HB 577), one accessory dwelling unit is allowed by-right on single-family lots statewide, including Madbury (Strafford County). A detached ADU can be up to 950 sf.
What are the ADU setbacks in Madbury?
In Madbury's R zone, ADUs follow the single-family setbacks: 35 ft front, 25 ft side, and 30 ft rear. Confirm your exact zone with the town.