How much does a building permit cost for a home project?
Typical fee ranges
Permit fees are set by local jurisdictions and can be based on project cost, square footage, or a flat fee. For minor work like a water heater replacement or small electrical job, fees often range from $50 to $200. For a deck or fence, $100 to $500 is common. For a room addition, you might pay $500 to $2,000 or more. In some high-cost areas, fees can be higher.
These are just general ranges—your actual cost depends on your city or county's fee schedule. Many building departments publish their fee schedule online, so you can estimate before you apply.
What affects the fee
The fee often scales with the valuation of the project (materials and labor). Some places use a flat fee per square foot. Others charge separate fees for electrical, plumbing, and mechanical permits. Additional costs can include plan review fees, inspection fees, and re-inspection fees if you fail an inspection.
Some jurisdictions offer online calculators or worksheets to help you estimate. If you're working with a contractor, they may include permit fees in their bid, but it's good to know the breakdown.
- Project valuation (total cost of labor and materials)
- Square footage of the work
- Number of separate trades (electrical, plumbing, etc.)
- Plan review required or not
- Expedited review options (often cost more)
Common mistakes
- Assuming permit fees are the same everywhere—they vary dramatically by city and state.
- Forgetting to budget for separate trade permits (electrical, plumbing, mechanical) which can add hundreds of dollars.
- Not checking if your contractor's bid includes permit fees; sometimes it doesn't, leaving you with a surprise bill.
