Deck permits in Issaquah: fees, timeline & requirements (2026)
Everything you need to know about pulling a deck permit in Issaquah, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Community Planning & Development.
Free lookup, no account needed — your lot polygon, zoning, setbacks and overlays, cited to Issaquah's source.
When does a deck need a permit in Issaquah?
A permit is required before any repairs, additions, or modifications to a deck more than 30 inches above grade (measured to the lowest point within 6 feet of the deck). Setbacks per IMC 18.404 by zone; decks in mapped ECA areas trigger critical-area review.
In the source's own words
“Before making any repairs, additions or modifications to a deck that is more than 30 inches above grade (measured to the lowest point within 6 feet of the deck), you need a permit.”Source ↗verified 2026-05-29
Required submittals
- Site plan with setbacks
- Framing plan w/ ledger detail
- Footing detail
- Guard/handrail detail
Inspection sequence
- Footing
- Framing
- Final
Contractor specialties needed
General contractor
Who can do this work in Issaquah?
Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout Issaquah and King County. Kolmo prepares the drawings and submittals, files the deck permit with Community Planning & Development, carries the project through review and inspections, and performs the construction. Call (206) 410-5100 for an Issaquah deck quote.
Notes & caveats
Issaquah has significant critical-area regulations (Issaquah Creek, East Fork Issaquah Creek, steep slopes throughout Squak Mountain / Tiger Mountain foothills). Decks in mapped ECA areas trigger critical-area review under IMC 18.10.
Deck permit fee estimate in Issaquah
Worked example for an $18,000 deck project (building permit). Your actual fee scales with project valuation.
| Building permit fee | $410.15 |
| Plan review | $266.60 |
| Technology surcharge | $40.61 |
| WA state surcharge | $6.50 |
| Estimated total | $723.86 |
Where a deck needs a permit in Issaquah, it is a building permit priced on the value of the work: $32.39 up to $500, $32.39 plus $4.05 for each $100 more up to $2,000, $96.55 for the first $2,000 plus $19.60 for each $1,000 more up to $25,000, and $544.06 for the first $25,000 plus $14.23 for each $1,000 more up to $50,000. Plan review, where required, adds 65% of that fee, a 6% technology surcharge is added, and the state building code fee is $6.50. Apply via mybuildingpermit.com. Computed from Issaquah's adopted fee schedule · source ↗. Land use, fire and engineering review, intake, impact and utility fees, where they apply, are charged separately.
How to apply yourself
- 1. Confirm your parcel's zoning & overlays. Run an address lookup for your Issaquah deck — 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: Community Planning & Development ↗
- 4. Track review (typical: 14–28 days). Respond to reviewer comments promptly.
- 5. Pay issuance fees (about $724 for an $18,000 project) and pick up the permit. Inspection card travels with the job.
Or have Kolmo do it
Kolmo prepares the drawings and submittals, files with Community Planning & Development, handles reviewer comments, and builds the project.
Licensed WA general contractor KOLMOL*753JS · bonded & insured
Deck permits in Issaquah — FAQ
When does a deck need a permit in Issaquah?
A permit is required before any repairs, additions, or modifications to a deck more than 30 inches above grade (measured to the lowest point within 6 feet of the deck). Setbacks per IMC 18.404 by zone; decks in mapped ECA areas trigger critical-area review.
How much does a deck permit cost in Issaquah?
For a $18,000 deck project, the estimated Issaquah permit fee is about $723.86 (building fee $410.15 + plan review $266.60 + surcharges) from Issaquah's adopted fee schedule. Land use, fire and engineering review, intake, impact and utility fees, where they apply, are charged separately.
How long does Issaquah take to review a deck permit?
Typical review window: 14–28 days. Over-the-counter eligible for some scopes.