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Electrical permits in Mercer Island: fees, timeline & requirements (2026)

Everything you need to know about pulling an electrical permit in 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 Mercer Island Community Planning & Development.

Look up your Mercer Island address

Free lookup, no account needed — your lot polygon, zoning, setbacks and overlays, cited to Mercer Island's source.

Permit required?
Always
Permit fee
Electrical permit fees are the City of Mercer Island's, not an L&I fee.
Review timeline
Not published by the city

When does electrical work need a permit in Mercer Island?

Mercer Island issues its own electrical permits — from the City's building official, not WA L&I. MICC 17.14.010 §105.1 requires anyone who intends to install, alter, repair, remove, convert or replace any electrical system to "first make application to the building official and obtain the required permit", and §105.1.2 requires an electrical permit, in accordance with chapter 19.28 RCW, for "The installation, alteration, repair, replacement, modification or maintenance of all electrical systems, wire and electrical equipment regardless of voltage." Mercer Island adopts the Washington Cities Electrical Code, Parts 1 and 3 (MICC 17.13.020), and its list of work exempt from permit (MICC 17.14.010 §105.2) has building, mechanical and plumbing items but no electrical ones.

From Mercer Island's own code

“105.1.2 Electrical permit required. In accordance with RCW Chapter 19.28, an electrical permit is required for the following installations: 1. The installation, alteration, repair, replacement, modification or maintenance of all electrical systems, wire and electrical equipment regardless of voltage.”
Source ↗verified 2026-09-25

Required submittals

  • Scope description
  • Load calc for service changes
  • Panel schedule for new panels

Inspection sequence

  1. Rough-in
  2. Service inspection (if applicable)
  3. Final

Contractor specialties needed

Electrician (journey-level 01 or residential 02)

Who can do this work in Mercer Island?

Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout Mercer Island and King County. Kolmo manages the electrical job from start to finish: a licensed electrical contractor performs the work and the permit, and Kolmo coordinates the scope, schedule, inspections and any related construction. Call (206) 410-5100 for a Mercer Island electrical quote.

Notes & caveats

Apply online at MyBuildingPermit.com — the City's page: "Single Family Electrical Permits can be obtained online at www.mybuildingpermit.com." Commercial and multifamily electrical permits typically require plan review. The building official inspects the electrical work (MICC 17.14.010 §110.4.11). L&I lists Mercer Island among the cities that issue their own electrical permits: "L&I does not issue permits or do inspections in the cities listed on this page". The WA electrical contractor license (L&I specialty 01 or 02) still governs who may do the work: L&I licenses the contractor, the City issues the permit. Service upgrade: load calc per NEC 220. EV charger ≥40A: dedicated circuit + GFCI. AFCI required on most habitable-space circuits (NEC 210.12).

How to apply yourself

  1. 1. Confirm your parcel's zoning & overlays. Run an address lookup for your Mercer Island electrical — we'll pull your specific lot polygon, zoning, setbacks, and any shoreline/ECA/historic overlays.
  2. 2. Assemble submittals (3).
  3. 3. Submit through the city portal: Mercer Island Community Planning & Development ↗
  4. 4. Track review. Respond to reviewer comments promptly.
  5. 5. Pay issuance fees (Mercer Island's fee schedule sets them) and pick up the permit. Inspection card travels with the job.

Or have Kolmo do it

Kolmo runs the job: a licensed electrical contractor does the electrical work and pulls the permit, and Kolmo coordinates the scope, schedule, inspections and any related construction.

(206) 410-5100

Licensed WA general contractor KOLMOL*753JS · bonded & insured

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Electrical permits in Mercer Island — FAQ

When does electrical work need a permit in Mercer Island?

Mercer Island issues its own electrical permits — from the City's building official, not WA L&I. MICC 17.14.010 §105.1 requires anyone who intends to install, alter, repair, remove, convert or replace any electrical system to "first make application to the building official and obtain the required permit", and §105.1.2 requires an electrical permit, in accordance with chapter 19.28 RCW, for "The installation, alteration, repair, replacement, modification or maintenance of all electrical systems, wire and electrical equipment regardless of voltage." Mercer Island adopts the Washington Cities Electrical Code, Parts 1 and 3 (MICC 17.13.020), and its list of work exempt from permit (MICC 17.14.010 §105.2) has building, mechanical and plumbing items but no electrical ones.

How much does an electrical permit cost in Mercer Island?

Electrical permit fees are the City of Mercer Island's, not an L&I fee. Apply via https://mybuildingpermit.com.

Mercer Island resourcesPermit portal ↗Fee schedule ↗