Estimate your permit fee before you apply. Based on national averages — verify with your local building department.
Estimate Your Permit Cost
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Estimated Permit Fee Range
📝 Note
This calculator provides estimates based on national averages. Actual permit fees vary significantly by city and county. Always contact your local building department for exact fees before budgeting your project.
Understanding Permit Fees
Value-Based Fees
Most common for additions, ADUs, and major projects. Calculated as a percentage of project value — typically 0.5–1.5%. Larger projects cost more in permits.
Flat Rate Fees
Common for fences, sheds, and roofs. A fixed amount regardless of project size. Simple to calculate and budget for.
Unit-Based Fees
Used for electrical and plumbing — charged per circuit, fixture, or outlet. Can add up on larger projects with many items.
Square Footage Fees
Used for new construction and additions. Calculated per sq ft of new space — typically $0.50–$5.00/sq ft.
What Else to Budget For
Additional Cost
Typical Range
When It Applies
Plan Review Fee
$100–$1,000
Complex projects requiring drawings
Electrical Permit
$50–$600
Any project with electrical work
Plumbing Permit
$50–$500
Any project with plumbing
Mechanical Permit
$50–$400
HVAC-related work
Impact/Development Fees
$1,000–$30,000+
ADUs, additions — varies widely
Reinspection Fee
$75–$250
If you fail an inspection
Expedite Fee
$200–$1,000
Fast-track review
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This calculator provides estimates based on national averages and typical permit fee structures. Actual permit costs vary significantly by municipality. Use this as a budgeting starting point, then contact your local building department for exact fees.
Does the calculator include all permit fees?
The calculator estimates the primary building permit fee. Many projects require additional permits (electrical, plumbing, mechanical) and may have plan review fees, impact fees, or other costs. Budget an additional 20–50% for these supplementary fees on complex projects.
Why are permit fees different in every city?
Permit fees are set by local ordinance and reflect the cost of running the building department, including plan review staff, inspectors, and administrative costs. High-cost-of-living cities with more stringent review processes charge higher fees.
Do I pay permit fees before or after approval?
Typically, permit fees are paid at the time of application, before approval. Some jurisdictions allow you to submit first and pay upon approval. If a permit is denied after fee payment, partial refunds may be available.
Are there ways to reduce permit fees?
Some jurisdictions offer fee reductions for: energy-efficient projects, affordable housing, first-time homeowners, or projects using pre-approved plans. Check with your local building department. Solar permits in particular have been fee-capped in many states.
Permit Costs by Project Type
See detailed permit cost breakdowns for each project type: