SULLIVAN, NEW HAMPSHIRE · CHESHIRE COUNTY

BUILD AN ADU IN SULLIVAN.

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

Sullivan setback reference

ADU setbacks in Sullivan follow your lot's single-family setbacks for its zoning district. Scan your address in the visualizer and we'll pull your exact parcel and confirm Sullivan's front, side, and rear requirements — or just ask us.

Note: Sullivan 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.

Confirm your zoning

Sullivan zoning ordinance ↗NH GRANIT GIS (parcels & zoning) ↗

📍 SEE AN ADU ON YOUR SULLIVAN LOT →GET A QUOTE

Sullivan ADU FAQ

Can I build an ADU in Sullivan, NH?

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

What are the ADU setbacks in Sullivan?

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