Heat pump permits in Woodinville: fees, timeline & requirements (2026)
Everything you need to know about pulling a heat pump / ductless mini-split permit in Woodinville, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Woodinville Development Services.
Free lookup, no account needed — your lot polygon, zoning, setbacks and overlays, cited to Woodinville's source.
When does a heat pump or ductless mini-split need a permit in Woodinville?
Installing or replacing a heat pump or ductless mini-split needs a mechanical permit in Woodinville: the City leaves the state mechanical code's exemptions unchanged (WMC 21.62.070), and those exempt only portable appliances and minor parts. Replacing an appliance in a single-family house is issued over the counter in the City's Permit Portal, with no plan review; with a building permit, the mechanical work is part of the Combined Building Permit. The circuit needs an electrical permit from L&I, which the City does not issue.
From Woodinville's own code
“The listings of exemptions for electrical, gas, plumbing and mechanical shall remain unchanged.”Source ↗verified 2026-11-07
Who can do this work in Woodinville?
Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout Woodinville and King County. Kolmo manages the heat pump / ductless mini-split job from start to finish: a licensed HVAC subcontractor performs the work and the permit, and Kolmo coordinates the scope, schedule, inspections and any related construction. Call (206) 410-5100 for a Woodinville heat pump / ductless mini-split quote.
Notes & caveats
Replacing a single-family furnace, heat pump or other appliance is a mechanical permit issued over the counter in the City's Permit Portal, with no plan review; a rooftop unit needs plan review. The City leaves the state mechanical code's exemptions unchanged (WMC 21.62.070), so only portable appliances, minor parts and small self-contained refrigeration units are exempt. The heat pump's circuit needs an L&I electrical permit and inspection.
How to apply yourself
- 1. Confirm your parcel's zoning & overlays. Run an address lookup for your Woodinville heat pump / ductless mini-split — we'll pull your specific lot polygon, zoning, setbacks, and any shoreline/ECA/historic overlays.
- 2. Assemble submittals (site plan, scope-of-work, photos).
- 3. Submit through the city portal: Woodinville Development Services ↗
- 4. Track review. Respond to reviewer comments promptly.
- 5. Pay issuance fees (Woodinville's fee schedule sets them) and pick up the permit. Inspection card travels with the job.
Or have Kolmo do it
Kolmo runs the job: a licensed HVAC subcontractor does the heat pump / ductless mini-split work and pulls the permit, and Kolmo coordinates the scope, schedule, inspections and any related construction.
Licensed WA general contractor KOLMOL*753JS · bonded & insured
Heat pump permits in Woodinville — FAQ
When does a heat pump or ductless mini-split need a permit in Woodinville?
Installing or replacing a heat pump or ductless mini-split needs a mechanical permit in Woodinville: the City leaves the state mechanical code's exemptions unchanged (WMC 21.62.070), and those exempt only portable appliances and minor parts. Replacing an appliance in a single-family house is issued over the counter in the City's Permit Portal, with no plan review; with a building permit, the mechanical work is part of the Combined Building Permit. The circuit needs an electrical permit from L&I, which the City does not issue.
How much does a heat pump / ductless mini-split permit cost in Woodinville?
Current fee per the Woodinville fee schedule: A heat pump is a mechanical permit in Woodinville, $119 plus $25 a fixture, where an appliance and its duct work or piping count as one (2026 Fee Schedule); replacing a single-family appliance is issued over the counter, with no plan review. On a Combined Building Permit the mechanical work adds $25 a fixture to the building permit instead. Where plan review applies, it is 65% of the building permit fee figured on the mechanical system's value alone. The circuit needs an L&I electrical permit, at L&I's fees. Apply through Woodinville's online Permit Portal (https://aca-prod.accela.com/woodinville/default.aspx); the Apply for a Permit Online page (https://www.woodinville.gov/347/Apply-for-a-Permit-Online) explains the account setup.