What Are New Hampshire Impact Fees?
New Hampshire towns adopt impact fees as an innovative land use control under RSA 674:21, most commonly for schools, roads, public safety, and recreation. Fees must be proportional, held in dedicated accounts, and refunded if unspent within six years.
Southern-tier and Seacoast towns facing Boston-driven growth are the state's most active adopters. New Hampshire figures on impactfees.org are model estimates scaled to town size — schedules are set town by town, so confirm with each planning office.
New Hampshire figures are illustrative estimates from our statewide cost model — calibrated to local construction costs and community size — rather than verified fee schedules. Use them for early budgeting and site comparison, and see our methodology for how estimates are built.
Counties Covered
Our calculator covers all 10 New Hampshire counties:
Click any county to open the calculator pre-loaded with that jurisdiction.
Major New Hampshire Markets
Click any market to open the calculator pre-loaded with that city.
Manchester / Hillsborough
School and road impact fees apply across surrounding growth towns.
Nashua / Hillsborough
Border-town growth supports school and public safety fees.
Concord / Merrimack
Capital-area towns pair impact fees with utility connection charges.
Portsmouth & Dover / Rockingham & Strafford
Seacoast housing pressure drives school and road fee adoption.
How the Calculator Works
- Pick your development type — Single-family, multifamily, commercial, industrial, or office.
- Search or pin your site — Enter an address or drop a pin anywhere in New Hampshire.
- We identify the jurisdiction — City, county, and state are resolved automatically.
- Get an instant breakdown — Water, sewer, road, park, school, and fire fees by category — verified where researched, clearly-labeled estimates where not.