Electrical permits in City of Mercer Island: fees, timeline & requirements (2026)
Everything you need to know about pulling a electrical 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 electrical need a permit in City of Mercer Island?
WAC 296-46B (WA-adopted 2020 NEC) requires an electrical permit for essentially all electrical work. L&I issues them in most jurisdictions; some cities run their own program. L&I publishes the exemption list, and it is narrower and more specific than "ordinary repairs": travel trailers; plug-in household appliances; and the LIKE-IN-KIND replacement of lamps, a single set of fuses, a single battery under 150 amp-hour, control components such as contactors, relays, timers, starters and circuit boards, one household appliance, circuit breakers (branch-circuit overcurrent protection only, per NEC 100), single-family residential luminaires, up to five snap switches, dimmers, receptacle outlets, thermostats, heating elements or identical luminaire ballasts, sign and outline-lighting components replaced on-site by an electrical contractor without modifying the system, and one motor of ten horsepower or smaller. AN EXEMPTION FROM THE PERMIT IS NOT AN EXEMPTION FROM INSPECTION: L&I requires an inspection request before any electrical work is covered, no later than 3 business days after the work is finished or 1 business day after any part is energized, whichever comes first, and failure to request one can carry civil penalties.
How City of Mercer Island adopted this rule
The threshold comes from the state code (WAC 296.46b), which City of Mercer Island adopts by reference in the provision quoted below.
“The 2023 Edition of the Washington Cities Electrical Code (WCEC) Part 1 and Part 3, excluding Part 2, Administration, is adopted by reference, together with the following amendments, additions and exceptions.”Source ↗verified 2026-04-29
Required submittals
- scope description
- load calc for service changes
- panel schedule for new panels
Inspection sequence
- rough-in
- service inspection (if applicable)
- final
Contractor specialties needed
electrical-01-or-02
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 electrical 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 electrical quote.
Notes & caveats
Per multi-jurisdiction tip sheet (Mercer Island column): "Electrical circuits and services" require a permit. Note: per WA state law, electrical permits are issued by Washington State Labor & Industries, not by individual cities. Mercer Island's building permit covers structural/non-electrical work.
How to apply yourself
- 1. Confirm your parcel's zoning & overlays. Run an address lookup for your City of Mercer Island electrical — we'll pull your specific lot polygon, zoning, setbacks, and any shoreline/ECA/historic overlays.
- 2. Assemble submittals (3).
- 3. Submit through the city portal: Apply via MyBuildingPermit.com. ↗
- 4. Track review. Respond to reviewer comments promptly.
- 5. Pay issuance fees (Electrical permit fees are set by circuit count and service size in the issuing agency's fee schedule.) and pick up the permit. Inspection card travels with the job.
Or have Kolmo do it
We pull electrical 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
Electrical permits in City of Mercer Island — FAQ
When does a electrical need a permit in City of Mercer Island?
WAC 296-46B (WA-adopted 2020 NEC) requires an electrical permit for essentially all electrical work. L&I issues them in most jurisdictions; some cities run their own program. L&I publishes the exemption list, and it is narrower and more specific than "ordinary repairs": travel trailers; plug-in household appliances; and the LIKE-IN-KIND replacement of lamps, a single set of fuses, a single battery under 150 amp-hour, control components such as contactors, relays, timers, starters and circuit boards, one household appliance, circuit breakers (branch-circuit overcurrent protection only, per NEC 100), single-family residential luminaires, up to five snap switches, dimmers, receptacle outlets, thermostats, heating elements or identical luminaire ballasts, sign and outline-lighting components replaced on-site by an electrical contractor without modifying the system, and one motor of ten horsepower or smaller. AN EXEMPTION FROM THE PERMIT IS NOT AN EXEMPTION FROM INSPECTION: L&I requires an inspection request before any electrical work is covered, no later than 3 business days after the work is finished or 1 business day after any part is energized, whichever comes first, and failure to request one can carry civil penalties.
How much does a electrical permit cost in City of Mercer Island?
Current fee per the City of Mercer Island fee schedule: Electrical permit fees are set by circuit count and service size in the issuing agency's fee schedule.. Plus ancillary plan-review/tech-surcharge fees per city schedule.