Canaan, New Hampshire · Grafton County

Build an ADU in Canaan.

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 Canaan — by-right. A detached ADU can be up to 950 sf, and ADU setbacks match your lot's single-family setbacks.

Canaan setback reference

ADU setbacks in Canaan follow your lot's single-family setbacks for its zoning district. Get a free zoning review and we'll pull your exact parcel and confirm Canaan's front, side, and rear requirements — or just ask us.

Note: Canaan is beyond ~1 hour from our Madbury home base, so a travel-time allowance may be added — we'll spell it out in your quote.

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Canaan zoning ordinance ↗NH GRANIT GIS (statewide parcels) ↗

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Canaan ADU FAQ

Can I build an ADU in Canaan, NH?

Yes. Under NH RSA 674:71-73 (HB 577), one accessory dwelling unit is allowed by-right on single-family lots statewide, including Canaan (Grafton County). A detached ADU can be up to 950 sf.

What are the ADU setbacks in Canaan?

ADU setbacks in Canaan match your lot's single-family setbacks for its zoning district. We pull your exact parcel and confirm Canaan's requirements before locking your price.

ADU rules in nearby Grafton County towns

Ashland Bath Benton Bethlehem Bridgewater Bristol Campton Dorchester