New Hampshire Zoning & Land Use Guide
Last updated: Verified:
Comprehensive guide to New Hampshire zoning laws, building codes, and land use regulations.
Key Facts
- Building Code: NH State Building Code (based on 2018 IBC)
- State ADU Law: Yes — ADU-friendly
- ADU Details: HB 1291 (2024) requires all municipalities in New Hampshire to allow accessory dwelling units as a permitted use on any lot that allows single-family dwellings, limiting the ability of local governments to prohibit ADUs outright.
Official Sources
Cities in New Hampshire
Disclaimer: The information on this website is provided for general informational purposes only and does not constitute legal, financial, or professional advice. Always verify current requirements with your local planning department.