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.

Stormwater permits in City of Renton: fees, timeline & requirements (2026)

Everything you need to know about pulling a stormwater / drainage permit in City of Renton, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Renton uses TRAKiT permits portal..

Permit required?

Yes — see threshold below

Permit fee

Drainage review fee commonly tiered by project size; small project ~$300-$800, full drainage review $1,500+. Apply via https://permits.rentonwa.gov.

Review timeline

—

When does a stormwater / drainage need a permit in City of Renton?

KC Surface Water Design Manual 2021 (KCC 9.04 + adopted by reference in most KC cities) sets the 2,000 sqft new+replaced impervious threshold for "small project" drainage review; ≥5,000 sqft triggers full drainage review. Different thresholds in critical-area drainage basins.

Required submittals

drainage report (full or simplified)
site plan with impervious calc
BMP / facility detail
geotech if infiltration claimed

Inspection sequence

pre-construction (BMPs in place)
facility installation
final stabilization

Contractor specialties needed

general

Notes & caveats

Issuing body is city public works / county DPER, often parallel to the building permit. On-site infiltration / detention required where infeasible to discharge to municipal storm. Critical-area parcels (steep slope, salmon-bearing watercourse) get more conservative review.

Stormwater permit fee estimate in City of Renton

Worked example for a $25,000 stormwater / drainage project (building permit). Your actual fee scales with project valuation.

Building permit fee	$391.25
Plan review	$254.31
WA state surcharge	$4.5
Estimated total	$650.06

Drainage review fee commonly tiered by project size; small project ~$300-$800, full drainage review $1,500+. Apply via https://permits.rentonwa.gov. Computed from the City of Renton 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 Renton stormwater / drainage — 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: Renton uses TRAKiT permits portal. ↗
4. Track review (typical: —). Respond to reviewer comments promptly.
5. Pay issuance fees (Drainage review fee commonly tiered by project size; small project ~$300-$800, full drainage review $1,500+. Apply via https://permits.rentonwa.gov.) and pick up the permit. Inspection card travels with the job.

Compare this against other cities

Side-by-side stormwater / drainage requirements across all 10 verified Seattle-area cities.

All City of Renton permits

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

Stormwater permits in City of Renton — FAQ

When does a stormwater / drainage need a permit in City of Renton?

How much does a stormwater / drainage permit cost in City of Renton?

For a $25,000 stormwater / drainage project, the estimated City of Renton permit fee is about $650.06 — building fee $391.25 + plan review $254.31 + surcharges. Fees scale with project valuation per the city schedule.

City of Renton resourcesPermit portal ↗Fee schedule ↗