How do I know if I need a permit?

Ask your local building department about your specific scope. As a pattern, structural, electrical, plumbing, mechanical, and anything altering the building envelope usually requires a permit; cosmetic work usually does not.

Last reviewed 2026-07-15

Unpermitted work can complicate insurance claims and property sales, and can require retroactive correction at your expense.

Contractors often pull permits as part of the job. Make it explicit in the contract who is responsible, and keep the closed permit in your home record.

What to check first

  • Your municipality's published permit thresholds
  • Whether a homeowners association also has approval requirements
  • Who is responsible for permits in the contract
  • Whether previous unpermitted work exists at the property

When to call a professional

  • The scope touches structure, gas, electrical service or main drainage
  • You are resolving previously unpermitted work