New HampshireADU Experts
Towns we serve

We build ADUs across all of New Hampshire.

Under NH RSA 674:71-73 (HB 577), one ADU is allowed by-right on single-family lots statewide. That said, the state did carve out certain areas towns can still regulate, so the specifics vary from town to town. Find your town below, then schedule a free phone consultation and we'll check exactly what your town allows.

A note on accuracy: towns amend their zoning ordinances constantly — often every March at town meeting. We verify each town's numbers against its published ordinance, but rules can change between our checks. Always confirm with your town's land use office before you build, and if you spot something out of date, tell us at hello@nhaduexperts.com — we'll fix it.

Belknap County · 11

Carroll County · 18

Cheshire County · 23

Coös County · 19

Grafton County · 39

Hillsborough County · 31

Merrimack County · 27

Rockingham County · 36

Strafford County · 13

Sullivan County · 15