What do I do if I built without a permit?

Updated October 2026 · How we answer

Short answerContact your local building department immediately to discuss options. You'll likely need to apply for a permit, pay fees and possibly fines, and may need to open walls or make changes to meet code.

First Steps to Take

If you realize you've built without a required permit, the best move is to contact your local building department right away. Explain the situation honestly—many departments are more forgiving if you come forward voluntarily rather than waiting for a complaint or inspection.

Ask about the process for retroactive permits, sometimes called 'after-the-fact' permits. They'll tell you what paperwork you need, what inspections are required, and whether you'll face penalties. In some cases, you may need to expose work (like removing drywall) so inspectors can verify it meets code.

If the work was done by a contractor, they may be responsible for pulling the permit. Check your contract and local rules—some states require the contractor to get the permit. If they refuse to help, you may need to report them to the licensing board.

  • Gather any plans, receipts, and photos of the work.
  • Call or visit your local building department.
  • Ask about retroactive permit procedures and fees.
  • Be prepared to make corrections if the work doesn't meet code.

Possible Outcomes and Costs

The consequences vary widely by location and the type of work. Common outcomes include paying double permit fees (often called a penalty fee), fines that can range from a few hundred to several thousand dollars, and the requirement to bring the work up to current code.

If the work is unsafe or violates zoning rules (like a room addition too close to the property line), you might have to demolish or alter it. In rare cases, the city could take legal action, but most departments prefer to work with homeowners to resolve issues.

Costs can add up: permit fees, penalty fees, professional inspections, and construction to fix problems. It's usually cheaper to address it now than to face problems when selling or after a complaint.

When to Hire a Professional

If the project is complex—like structural changes, electrical, or plumbing—consider hiring a licensed contractor or engineer to help you navigate the process. They can assess what needs to be done and communicate with the building department on your behalf.

For simple projects, you might handle it yourself. But if you're unsure, a consultation with a local permit expedititor or construction attorney can clarify your options. Remember, this is general information; your local rules govern.

Common mistakes

  • Ignoring the problem and hoping no one notices—this can lead to bigger fines and forced removal later.
  • Assuming you can just pay a fine and keep the work as-is; usually you must also meet current building codes.
  • Thinking that because the work was done years ago it's 'grandfathered'—grandfathering typically applies to code changes, not to work done without any permit.
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