Londonderry, NH · Deck or porch permit
Londonderry, NH deck or porch permit checklist
5 required items. Read from the town's pages on 09/27/2026.
In the packet (4)
- Building permit application, completed, signed and dated Residential Building Permit Application
- Deck plan with footing, framing and ledger details Deck Construction Application (2021 IRC)
- Plot plan showing the work and distances to the lot lines RSA Chapter 155-A New Hampshire Building Code (full chapter)
- Londonderry Deck Construction Application Deck Construction Application (2021 IRC)
Only when it applies (1)
- State permit for the site (driveway, shoreland or wetlands) (when Is any work within 100 feet of a wetland, stream or pond: yes) RSA Chapter 482-A Fill and Dredge in Wetlands