JEFFERSON, NEW HAMPSHIRE · COÖS COUNTY

BUILD AN ADU IN JEFFERSON.

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

Jefferson setback reference

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

Note: Jefferson 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

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

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

Jefferson ADU FAQ

Can I build an ADU in Jefferson, NH?

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

What are the ADU setbacks in Jefferson?

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