HVAC permits in Lynnwood: fees, timeline & requirements (2026)
Everything you need to know about pulling an HVAC / mechanical permit in Lynnwood, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Lynnwood Development & Business Services.
Free lookup, no account needed — the office that issues the permit at your address, cited to Lynnwood's source.
When does HVAC work need a permit in Lynnwood?
WAC 51-52 (2021 IMC) and WAC 51-56 (2021 UPC) require mechanical permit for any equipment install, replacement, or relocation. WSEC R403 requires sizing per Manual J/S/D for new equipment.
How Lynnwood adopted this rule
The threshold comes from the state code (WAC 51.52), which Lynnwood adopts by reference in the provision quoted below.
“As amended by this chapter and the State of Washington Building Code Council, the latest edition of the International Mechanical Code (IMC), as published by the International Code Council”Source ↗verified 2026-10-02
What Lynnwood says in its own permit handout
From Mechanical Checklist, published by Lynnwood. This is the jurisdiction's own guidance on its permit process, not the ordinance text — where the two differ, the code governs.
“Mechanical permits are required when installing, altering, relocating or replacing mechanical systems, or fuel gas piping in existing or new buildings (other than new single-family residences).”Checklist ↗read 2026-09-05
Required submittals
- Equipment specs (model #, capacity)
- Manual J/S/D for new system
- Gas piping diagram if applicable
- Electrical permit cross-reference
Inspection sequence
- Rough-in / gas pressure test
- Final
Contractor specialties needed
HVAC contractor · Electrician (journey-level 01 or residential 02), for heat pump tie-in
Who can do this work in Lynnwood?
Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout Lynnwood and Snohomish County. Kolmo manages the HVAC / mechanical job from start to finish: a licensed HVAC subcontractor performs the work and pulls the permit, and Kolmo coordinates the scope, schedule, inspections and any related construction. Call (206) 410-5100 for a Lynnwood HVAC / mechanical quote.
Notes & caveats
Heat pump or AC condensate must drain per IMC. Combustion appliance: combustion air, venting, gas piping leak test. WA HB 1185 (HEEHRA): heat-pump rebates available through energy.wa.gov.
How to apply yourself
- 1. Check who issues the permit. Run an address lookup for your HVAC work in Lynnwood — we'll confirm which office issues the permit at that address.
- 2. Assemble submittals: the 4 documents under Required submittals above.
- 3. Submit through the city portal: Lynnwood Development & Business Services ↗
- 4. Track review. Respond to reviewer comments promptly.
- 5. Pay issuance fees (Lynnwood'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 HVAC / mechanical work and pulls the permit, and Kolmo coordinates the scope, schedule, inspections and any related construction.
Licensed WA general contractor KOLMOL*753JS · bonded & insured
HVAC permits in Lynnwood — FAQ
When does HVAC work need a permit in Lynnwood?
WAC 51-52 (2021 IMC) and WAC 51-56 (2021 UPC) require mechanical permit for any equipment install, replacement, or relocation. WSEC R403 requires sizing per Manual J/S/D for new equipment.
How much does an HVAC / mechanical permit cost in Lynnwood?
Lynnwood's mechanical permit for work on an existing house (the schedule's remodel or addition line) is $257 for up to 4 pieces of equipment and $22 for each one more; for new construction it is 10% of the building permit fee. A standalone gas piping permit is $257 for up to 4 outlets and $22 for each one more. A new circuit needs a City electrical permit, $147 for up to 10 circuits. A 2.5% technology fee is added (LMC 3.104).