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When a Permit is Required

A permit is required for the following:

  • All new construction (including sheds over 120sf and shipping containers), additions, renovations, replacement of decks, stairs, and any other repairs that require structural alterations (including replacement of windows and doors) regardless of cost or value, or whether the construction occurs on site or the structure is moved to the site.
  • Electrical work
  • Plumbing work
  • Gas Piping
  • Septic system installation (new and replacement)
  • Well installation (new and replacement)
  • Demolishing or removing a structure
  • Above and in ground pools
  • All signs

Installation of siding, roofing, and replacement windows that do not require structural alterations or repairs is considered maintenance and does not need a permit. Also included is the replacement of existing cabinets, countertops, and kitchen and bathroom fixtures (sinks, toilets, etc.) in the same location.

Structures that may not need a permit (such as small sheds, chicken coops, etc.) are still required to comply with the property line setbacks detailed in the Zoning Ordinance. A setback information sheet is available in the Forms and Applications section of our website.

We do ask that you fill out a Minor Modification form for projects that do not require a permit in order to provide information for the property files here at the Town Hall. That form, and a flyer detailing work that does not need permits, is available in the Forms and Applications section of our website.

If you have questions about the need for a permit, please contact us at (603) 875-2164, or by email at building@alton.nh.gov or code@alton.nh.gov.