Addition permits in City of Kent: fees, timeline & requirements (2026)
Everything you need to know about pulling a home addition permit in City of Kent, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Kent uses MyKent permits portal..
Free lookup, no account needed — your lot polygon, zoning, setbacks and overlays, cited to City of Kent's source.
When does a home addition need a permit in City of Kent?
A residential building permit is required for most construction, alteration, or repair work — including changing a building's occupancy, structure, or living space. Intake fees are billed when the submittal is deemed complete (pay within 15 days); issuance fees are due before the permit is issued.
In the source's own words
“Changing a building's occupancy, structure or living space.”Source ↗verified 2026-05-29
Required submittals
- Site plan
- Fully dimensioned floor plan for each floor (label each room/area with intended use)
- Construction plans
- Energy code calcs (2021 WSEC-R)
Inspection sequence
- foundation/footing
- plumbing rough-in
- electrical rough-in
- mechanical rough-in
- framing
- insulation
- drywall
- final
Contractor specialties needed
general, plumbing, mechanical
Who can do this work in City of Kent?
Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout City of Kent and King County. Kolmo prepares the drawings and submittals, files the home addition permit with Kent uses MyKent permits portal., carries the project through review and inspections, and performs the construction. Call (206) 410-5100 for a City of Kent home addition quote.
Notes & caveats
2021 IRC R301 governs framing. WSEC R402.1 sets envelope requirements. New conditioned space requires Manual J HVAC sizing. Lateral load path continuity required for vertical additions. Most WA cities use a uniform fee bracket (UBC Table 1-A) for the building permit; plan review fee is typically 65% of building permit fee.
Addition permit fee — Washington baseline, not City of Kent's own schedule
Worked example for a $120,000 home addition project (building permit). Your actual fee scales with project valuation.
| Building permit fee | $1,105.75 |
| Plan review | $718.74 |
| WA state surcharge | $6.5 |
| Estimated total | $1,830.99 |
Plan-review fee scales with valuation per UBC Table 1-A. State surcharge $6.50 per building permit. Trade permits (E/P/M) separate. Apply via https://mybuildingpermit.com. We have not read City of Kent's adopted fee schedule, so this is not City of Kent's fee: it walks the standard valuation table most Washington cities adopt by reference, as a rough guide. The real numbers are in City of Kent's fee schedule ↗. Impact/utility fees may apply separately.
How to apply yourself
- 1. Confirm your parcel's zoning & overlays. Run an address lookup for your City of Kent home addition — 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: Kent uses MyKent permits portal. ↗
- 4. Track review. Respond to reviewer comments promptly.
- 5. Pay issuance fees (Plan-review fee scales with valuation per UBC Table 1-A. State surcharge $6.50 per building permit. Trade permits (E/P/M) separate. Apply via https://mybuildingpermit.com.) and pick up the permit. Inspection card travels with the job.
Or have Kolmo do it
We pull home addition permits in City of Kent every month. We prepare the drawings and submittals, file with Kent uses MyKent permits portal., handle reviewer comments, and build the project.
Licensed WA general contractor KOLMOL*753JS · bonded & insured
Addition permits in City of Kent — FAQ
When does a home addition need a permit in City of Kent?
A residential building permit is required for most construction, alteration, or repair work — including changing a building's occupancy, structure, or living space. Intake fees are billed when the submittal is deemed complete (pay within 15 days); issuance fees are due before the permit is issued.
How much does a home addition permit cost in City of Kent?
For a $120,000 home addition project, the estimated City of Kent permit fee is about $1,830.99 — building fee $1,105.75 + plan review $718.74 + surcharges. Fees scale with project valuation per the city schedule.