Which cities is the Kolmo permit lookup verified for?

Ten cities: Seattle, Bellevue, Kirkland, Redmond, Sammamish, Issaquah, Renton, Kent, Federal Way, and Mercer Island. For these, every fee, threshold, and timeline is sourced from the city directly with the exact quote, URL, and the date Kolmo sourced it; an automated scanner monitors the source pages daily for drift. Outside these ten cities address lookup still works and we render the parcel and Washington-state baseline code, but per-city specifics are flagged as unverified.

Does the lookup cover unincorporated King, Pierce, or Snohomish County?

Address lookup works and parcels resolve to the county building department, but unincorporated coverage is currently baseline-only — Washington-state IRC, IBC, and WSEC plus state critical-area rules. Per-county fee and code deviations have not been verified to the same standard as the ten verified cities.

Will this replace calling the permit center?

For most homeowner projects — decks, kitchens, bathrooms, ADUs, fences, siding, windows, flooring, roofing, HVAC, electrical, plumbing — the published answer matches what the permit center will say, and the homeowner can submit with a pre-filled application packet. For variances, conditional uses, or unusual scope, calling the city planner is still recommended.

Where does the address go after submission?

The address is geocoded via Google Maps to identify the correct county, then queried against public county GIS endpoints. Parcel data is cached for 30 days. The address is not contacted, sold, or shared with third parties.

Who built this — and why?

Built by Kolmo Construction, a licensed Seattle-area general contractor. The team works with permit code daily and built this to fix the public web's poor coverage of homeowner permit questions. The lookup is free; if a homeowner wants a contractor for the project, Kolmo is one option.

Window replacement permits in City of Seattle: fees, timeline & requirements (2026)

Everything you need to know about pulling a window replacement permit in City of Seattle, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Seattle Department of Construction & Inspections (SDCI).

Permit required?

Often no

Permit fee

Like-for-like usually no permit. Structural changes scale with valuation.

Review timeline

— · OTC eligible

When does a window replacement need a permit in City of Seattle?

Like-for-like replacement in existing rough opening with U-factor compliance: typically exempt. New opening, enlarged opening, change in egress compliance, or any structural header change requires Subject-to-Field-Inspection permit.

Required submittals

if structural change: header schedule, structural detail, NFRC sticker

Inspection sequence

rough-opening (if structural)
final (if permit required)

Contractor specialties needed

general

Notes & caveats

WSEC R402.4 requires replacement windows U-factor ≤0.30 (zone 4C). Egress (IRC R310) preserved on sleeping-room windows.

Window replacement permit fee estimate in City of Seattle

Worked example for a $8,000 window replacement project (building permit). Your actual fee scales with project valuation.

Building permit fee	$199.23
Plan review	$129.5
Technology surcharge	$9.96
WA state surcharge	$4.5
Estimated total	$343.19

Like-for-like usually no permit. Structural changes scale with valuation. Computed from the City of Seattle fee bracket schedule · source ↗. Impact/utility fees may apply separately.

How to apply

1. Confirm your parcel's zoning & overlays. Run an address lookup for your City of Seattle window replacement — we'll pull your specific lot polygon, zoning, setbacks, and any shoreline/ECA/historic overlays.
2. Assemble submittals (1).
3. Submit through the city portal: Seattle Department of Construction & Inspections (SDCI) ↗
4. Track review (typical: —). Respond to reviewer comments promptly.
5. Pay issuance fees (Like-for-like usually no permit. Structural changes scale with valuation.) and pick up the permit. Inspection card travels with the job.

Compare this against other cities

Side-by-side window replacement requirements across all 10 verified Seattle-area cities.

All City of Seattle permits

Every project type — ADU, addition, kitchen, bath, deck, fence, and more — for City of Seattle.

Window replacement permits in City of Seattle — FAQ

When does a window replacement need a permit in City of Seattle?

How much does a window replacement permit cost in City of Seattle?

For a $8,000 window replacement project, the estimated City of Seattle permit fee is about $343.19 — building fee $199.23 + plan review $129.5 + surcharges. Fees scale with project valuation per the city schedule.

City of Seattle resourcesPermit portal ↗Fee schedule ↗