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HVAC permits in Spokane, WA: what needs one and who issues it
Washington requires a mechanical permit even for a like-for-like furnace or AC swap. Where you live in the Spokane area decides which office issues it, and some jobs need an electrical permit as well.
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NBy Nell Bradshaw, HVAC Guides Editor · Updated September 2026
Quick answerIn Washington, replacing a furnace, AC, heat pump or water heater needs a mechanical permit, even when the new unit matches the old one. Inside Spokane city limits the permit comes from the Development Services Center at City Hall; Spokane Valley has its own permit center, and Spokane County covers unincorporated areas. Wiring for new equipment usually needs a separate electrical permit.
Do you need a permit for a swap?
Yes. Washington requires a mechanical permit for HVAC replacement statewide, including like-for-like swaps. That covers furnaces, air conditioners, heat pumps, boilers, ductless systems and gas water heaters, as well as new duct systems and alterations to existing ducts.
Spokane residential HVAC permit fees typically run about $75 to $300, a small part of most replacement jobs.
Who issues it
Where the house sits decides which office handles the permit:
- Inside Spokane city limits: the City of Spokane Development Services Center at City Hall, 808 W Spokane Falls Blvd.
- Inside Spokane Valley city limits: the City of Spokane Valley Permit Center on East Sprague Avenue.
- Unincorporated Spokane County: Spokane County's building and planning department.
- Outside Spokane County: the county or city where the property is.
Mechanical and electrical permits
The City of Spokane applies the International Mechanical Code to HVAC work. A mechanical permit covers the equipment, venting, gas connection and ductwork. Low-voltage thermostat wiring can go on the mechanical permit if the contractor also holds the right electrical license, but other HVAC circuits need a separate electrical permit and an electrical contractor license.
So a new heat pump with a new outdoor circuit, or a ductless system, typically involves both. A furnace swap on an existing circuit may only need the mechanical side.
Replacing equipment? the permit is part of our price.
Call (509) 404-0016Boilers and apartment buildings
Boiler work in commercial buildings and apartment buildings of six or more units needs a boiler permit application in the City of Spokane, separate from the standard residential process. If you own or manage a larger building, plan for that step on any commercial boiler work.
What inspectors look at
Inspections focus on safety: venting and clearances on gas appliances, gas line connections and shutoffs, combustion air, condensate drainage, equipment sizing paperwork where required, and electrical connections on the electrical side.
For residential equipment replacements in the City of Spokane, a completed form is submitted to the mechanical inspector before the final inspection can be approved.
Why the permit matters to you
A permitted, inspected installation gives you a record that the work was checked. That record can matter when you sell the house, file an insurance claim, or need warranty support on new equipment.
It also protects you from paying twice: work done without a permit can be flagged later and have to be opened up for inspection or redone.
Who files the permit
On our jobs, we file the permit and schedule the inspections as part of the work, whether it is a furnace replacement, a new heat pump or a gas fireplace insert. Ask any contractor you are comparing whether the permit is included in their price.
More Spokane heating and cooling guides
Spokane HVAC permit questions
Do I need a permit to replace my furnace with the same model?
Yes. Washington requires a mechanical permit for HVAC replacement, including like-for-like swaps.
Who issues HVAC permits in Spokane Valley?
The City of Spokane Valley Permit Center, separate from the City of Spokane.
Does a ductless install need an electrical permit?
Usually yes, for the new circuit to the outdoor unit, in addition to the mechanical permit.
How much does a residential HVAC permit cost in Spokane?
Typically about $75 to $300, depending on the equipment and the jurisdiction.
Can my contractor pull the permit for me?
Yes, and most do. We file permits and schedule inspections on our installation jobs.
Plan your replacement with the permit included.
Call about HVAC replacement in Spokane, WA.
