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.

Bathroom remodel permits in City of Sammamish: fees, timeline & requirements (2026)

Everything you need to know about pulling a bathroom remodel permit in City of Sammamish, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Apply via MyBuildingPermit.com..

Permit required?

Yes — see threshold below

Permit fee

Fees set by jurisdiction. Plus separate electrical, plumbing, and mechanical permits. Apply via https://mybuildingpermit.com.

Review timeline

—

When does a bathroom remodel need a permit in City of Sammamish?

Bathroom remodels are processed as a Single-Family Residential Remodel permit. A Sewer Availability Certificate is required when the project exceeds 50% of the assessed value or includes additional plumbing fixtures; like-for-like finish work is exempt.

From City of Sammamish's own page

“Required when the proposed project exceeds 50% of the assessed value of the property, or the project includes additional plumbing fixtures.”
Source ↗verified 2026-06-26

Required submittals

floor plan with fixture locations
plumbing diagram
electrical layout
waterproofing detail at tub/shower

Inspection sequence

rough-in (electrical/plumbing/mechanical)
shower-pan/waterproofing
insulation if walls opened
drywall
final

Contractor specialties needed

general, plumbing

Notes & caveats

2021 IRC R105.1. GFCI/AFCI required at bathroom outlets per NEC 210.8 + WA amendments. Exhaust fan must vent to exterior (IRC R303). Tile shower waterproofing inspection required (PMG-001 / TCNA-aligned).

Bathroom remodel permit fee estimate in City of Sammamish

Worked example for a $22,000 bathroom remodel project (building permit). Your actual fee scales with project valuation.

Building permit fee	$349.25
Plan review	$227.01
WA state surcharge	$4.5
Estimated total	$580.76

Fees set by jurisdiction. Plus separate electrical, plumbing, and mechanical permits. Apply via https://mybuildingpermit.com. Computed from the City of Sammamish 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 Sammamish bathroom remodel — we'll pull your specific lot polygon, zoning, setbacks, and any shoreline/ECA/historic overlays.
2. Assemble submittals (4).
3. Submit through the city portal: Apply via MyBuildingPermit.com. ↗
4. Track review (typical: —). Respond to reviewer comments promptly.
5. Pay issuance fees (Fees set by jurisdiction. Plus separate electrical, plumbing, and mechanical permits. Apply via https://mybuildingpermit.com.) and pick up the permit. Inspection card travels with the job.

Compare this against other cities

Side-by-side bathroom remodel requirements across all 10 verified Seattle-area cities.

All City of Sammamish permits

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

Bathroom remodel permits in City of Sammamish — FAQ

When does a bathroom remodel need a permit in City of Sammamish?

How much does a bathroom remodel permit cost in City of Sammamish?

For a $22,000 bathroom remodel project, the estimated City of Sammamish permit fee is about $580.76 — building fee $349.25 + plan review $227.01 + surcharges. Fees scale with project valuation per the city schedule.

City of Sammamish resourcesPermit portal ↗Fee schedule ↗