WARREN, NEW HAMPSHIRE · GRAFTON COUNTY

BUILD AN ADU IN WARREN.

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

Warren setback reference

ADU setbacks in Warren 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 Warren's front, side, and rear requirements — or just ask us.

Note: Warren 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

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

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

Warren ADU FAQ

Can I build an ADU in Warren, NH?

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

What are the ADU setbacks in Warren?

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