Permit Notices
Fire Department Permits
Oil burner, fire alarms, sprinkler systems, excluding seasonal and daily burn permits, will only be issued on Mondays, from 1 p.m. to 4 p.m., and on Thursdays, from 8:30 a.m. to 12 p.m., at the Londonderry Fire Department, 280 Mammoth Road. Please call 603-432-1124 for more information on these permits.
Building Department Permits
Permits that can be obtained on the online permits portal:
- Electrical
- Plumbing
- Gas / Mechanical
- Wood Stove / Pellet Stove
- Septic
- Well
- Sign
- Temporary Sign
Other Permits
All other permits shall be submitted in person or by mail. Please review the most recent Fee Schedule (PDF) and contact our office with questions.
You may download related forms on the Permits page. We do not accept permit submissions via email.
Inspections & General Information
Contact our office for inspections and general information.
Please note: The Building Department does not issue zoning letters nor provide research services for zoning & real estate companies seeking information for clients. Firms are encouraged to make an appointment to come in and view the applicable property files in the Building Department.
I-Codes
As of January 1, 2025, the 2021 I-Codes will be in effect.
This includes the 2021:
- International Building Code (IBC)
- International Residential Code (IRC)
- International Plumbing Code (IPC)
- International Mechanical Code (IMC)
- International Pool & Spa Code
Other Codes
The following codes are in effect:
- 2020 National Electric Code (NEC)
- As of January 1, 2010, carbon monoxide detectors are required in all new residential single-family, and multi-family construction.