HVAC Permit in Seattle, Washington

Permit required?

Yes, a permit is required.

When a permit is usually needed

For installation or replacement of any HVAC equipment including furnaces and heat pumps in Seattle

Permit cost and what affects it

Fees are set by the locality and are not published here. See the official fee schedule or contact the office for current amounts.

Permit costs generally depend on the project valuation, the scope of work, and the inspections required. Ask the office how the fee is calculated for your specific project.

Where to apply

• Official permit page
• Permit portal

Frequently asked questions

Do you need a hvac permit in Seattle?

A mechanical permit is required in Seattle for installation or replacement of HVAC equipment including furnaces, heat pumps, and air conditioning systems. SDCI issues mechanical permits. Simple projects may qualify for a subject-to-field-inspection permit issued within 24 hours. Fees are based on the value of construction plus an hourly review fee. Always confirm with the Seattle Department of Construction and Inspections before starting.

How much does a hvac permit cost in Seattle?

Fees are set by Seattle and are not published here. Contact the office for current amounts.

How long does a hvac permit take in Seattle?

Processing time for a hvac permit in Seattle varies by workload and project scope. Contact the Seattle Department of Construction and Inspections for a current estimate.

Where do you apply for a hvac permit in Seattle?

You can apply through the Seattle permit portal or contact the Seattle Department of Construction and Inspections directly. The links are listed on this page.

Official sources

• https://www.seattle.gov/sdci/permits/permits-we-issue-(a-z)/mechanical-permit
• https://www.seattle.gov/sdci/permits