Roofing permits in City of Mercer Island: fees, timeline & requirements (2026)
Everything you need to know about pulling a roofing / re-roof permit in City of Mercer Island, 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..
Free lookup, no account needed — your lot polygon, zoning, setbacks and overlays, cited to City of Mercer Island's source.
When does a roofing / re-roof need a permit in City of Mercer Island?
Permit required when: sheathing is replaced OR the type of roofing material is changed. Exempt: in-kind re-roofing of one- and two-family dwellings provided the roof sheathing is not removed or replaced.
How City of Mercer Island adopted this rule
The threshold comes from the state code (WAC 51.51), which City of Mercer Island adopts by reference in the provision quoted below.
“The 2021 Edition of the International Building Code (IBC), including the adoption of ICC/ANSI A117.1-2017, Requirements for Accessible and Useable Buildings and Facilities, as adopted and amended by the State Building Code Council in WAC Chapter 51-50, as published by the International Code Council, excluding Chapter 1, Administration, is adopted by reference, together with the following amendments and additions. The Construction Administrative Code, as set forth in chapter 17.14 MICC, shall be used in place of IBC Chapter 1, Administration.”Source ↗verified 2026-04-29
Required submittals
- scope description
- manufacturer underlayment + flashing details
Inspection sequence
- mid-roof / underlayment
- final
Contractor specialties needed
general
Who can do this work in City of Mercer Island?
Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout City of Mercer Island and King County. Kolmo prepares the drawings and submittals, files the roofing / re-roof permit with Apply via MyBuildingPermit.com., carries the project through review and inspections, and performs the construction. Call (206) 410-5100 for a City of Mercer Island roofing / re-roof quote.
Notes & caveats
From MICC 17.14.010 §105.2: "In-kind re-roofing of one- and two-family dwellings provided the roof sheathing is not removed or replaced" is exempt. The Mercer Island Residential Building Permits page lists a separate Re-Roof Permits section indicating that re-roof permits are required when sheathing is replaced or when the type of roofing material is changed.
How to apply yourself
- 1. Confirm your parcel's zoning & overlays. Run an address lookup for your City of Mercer Island roofing / re-roof — we'll pull your specific lot polygon, zoning, setbacks, and any shoreline/ECA/historic overlays.
- 2. Assemble submittals (2).
- 3. Submit through the city portal: Apply via MyBuildingPermit.com. ↗
- 4. Track review. Respond to reviewer comments promptly.
- 5. Pay issuance fees (Flat fee or valuation-based, per the city's fee schedule.) and pick up the permit. Inspection card travels with the job.
Or have Kolmo do it
We pull roofing / re-roof permits in City of Mercer Island every month. We prepare the drawings and submittals, file with Apply via MyBuildingPermit.com., handle reviewer comments, and build the project.
Licensed WA general contractor KOLMOL*753JS · bonded & insured
Roofing permits in City of Mercer Island — FAQ
When does a roofing / re-roof need a permit in City of Mercer Island?
Permit required when: sheathing is replaced OR the type of roofing material is changed. Exempt: in-kind re-roofing of one- and two-family dwellings provided the roof sheathing is not removed or replaced.
How much does a roofing / re-roof permit cost in City of Mercer Island?
Current fee per the City of Mercer Island fee schedule: Flat fee or valuation-based, per the city's fee schedule.. Plus ancillary plan-review/tech-surcharge fees per city schedule.