Pool Permit in Seattle, Washington
By Mario Bailey Last checked 2026-06-18 · 2 official sources
Verified against official sources From an official sourcePermit required
Quick answer
A building permit is required for residential swimming pool and hot tub installations in Seattle. The SDCI do-you-need-a-permit page lists pools as a project type requiring a permit. Fencing and safety barrier requirements also apply. Contact SDCI at (206) 684-8600 to confirm specific submittal requirements for your pool type.
Who is pulling this permit?
Apply yourself
Hire it out
Before you sign, ask the contractor:
- Who pulls the permit, you or me, and is the permit fee included in the bid?
- Which inspections will this job need, and who meets the inspector on site?
- Is your contractor license active in this locality, and under which business name?
Want a pro to handle this permit? Request free help
Tell us where your project stands. Free to ask; no obligation.
Where we have a vetted local pro who handles permits in Seattle, we connect you; otherwise we reply with the exact steps and office links for your situation. PermitNotebook is not a government agency and does not file permits. This is a free referral request; we may earn a fee if you hire a pro we introduce. Partners never influence our permit data. Privacy policy.
When a permit is usually needed
Before installing any residential swimming pool or hot tub in Seattle
What your pool permit must meet in Washington
Washington's 2021 Residential Code (WAC 51-51, effective statewide March 15, 2024) requires backyard swimming pools, spas, and hot tubs at single-family and duplex homes to be designed and built to the 2021 International Swimming Pool and Spa Code, incorporated by direct statewide reference rather than left to local option.
- The design and construction of swimming pools, spas, and other aquatic recreation facilities must comply with the 2021 International Swimming Pool and Spa Code whenever the facility falls into one of three defined residential categories (WAC 51-51-0327).
- That mandatory ISPSC standard covers pools for the sole use of a single-family dwelling's residents and guests, the sole use of a resident-owned duplex, or a facility used exclusively for medical physical therapy under a licensed practitioner's supervision (WAC 51-51-0327).
- Any other water recreation facility outside those residential categories is regulated under separate Washington Department of Health rules, not the Residential Code (WAC 246-260; WAC 51-50-3109).
Based on 2021 International Swimming Pool and Spa Code (ISPSC), incorporated by WAC 51-51-0327 into the 2021 Washington State Residential Code. Read the code. Local amendments can be stricter; confirm the current requirement with your office before you build.
What pool permit costs in Seattle
An unenclosed pool accessory to a single-family or duplex home is a flat fee of four times the $292 SDCI base fee, $1,168, plus a 5% technology fee, per Fee Subtitle Table D-2 item 17a; a pool inside an enclosed building on the building plans carries no separate fee.
How Seattle compares in Washington
| Jurisdiction | Permit needed? | Threshold |
|---|---|---|
| Bellevue | It depends | swimming pools over 24 inches deep require a permit with plan review; above-ground pools 24 inches or less may be exempt |
| Clark County | It depends | A permit is required for any structure intended for swimming or recreational bathing that contains water over 24 inches deep, including in-ground, aboveground and on-ground pools, hot tubs and spas. |
| King County | It depends | prefabricated above-ground pools less than 24 inches deep and not exceeding 5000 gallons are exempt; all other pools require a building permit in unincorporated King County |
| Pierce County | It depends | Prefabricated swimming pools accessory to a single family residence (Group R-3 occupancy) are exempt if less than 24 inches deep, with no separate gallon volume cap; in-ground pools and pools 24 inches deep or deeper require a building permit. Self-contained spas and hot tubs installed entirely above ground and not connected to the potable water system or a septic or sewer drain are separately exempt regardless of depth. |
| Seattlethis page | Permit required | Not specified |
| Snohomish County | It depends | prefabricated swimming pools regulated under the IRC (one- and two-family dwellings) exempt if less than 24 inches deep, with no gallon-volume cap; in-ground pools or pools 24 inches deep or more require a building permit |
| Tacoma | It depends | prefabricated above-ground pools less than 24 inches deep and not greater than 5000 gallons are exempt; all other pools require a building permit |
How to apply in Seattle
A residential pool permit application covers both construction and safety: a scaled site plan, structural plans for the pool, a barrier plan showing how the pool will be enclosed, and an electrical plan covering bonding and the equipment disconnect.
What most pool permit applications include:
- Pool and spa design and construction fall under the residential code chapter that folds in the swimming pool and spa code, and permit review checks plans against that chapter (IRC R326).
- The site plan must show pool equipment such as pumps, filters, and heaters set back at least 36 inches from the outside of the required barrier (ISPSC 305.2.9).
- For an in-ground pool, engineered structural plans covering the shell and reinforcing steel, with the responsible structural engineer's license information, are a standard part of the submittal (per official pool submittal checklists).
- A barrier plan identifying the fence, pool structure, or dwelling wall that will enclose the pool must be submitted and must comply with the code's barrier chapter (ISPSC 305).
- Electrical plans must show the pool's equipotential bonding design, since the shell, perimeter surfaces, and metal fittings within 5 feet of the water must all tie into a common bonding grid (NEC 680.26).
- The electrical plan must also show a disconnecting means for the pool equipment that is readily accessible and within sight of the equipment (NEC 680.13).
General submittal guidance from 2021 IRC R326 (adopting the ISPSC), ISPSC 2021 Section 305, and NEC 2020 Article 680. Source. Seattle Department of Construction and Inspections sets the exact checklist for Seattle.
Where to apply in Seattle:
Seattle Department of Construction and Inspections
- 700 5th Ave Suite 2000, Seattle, WA 98104
- Phone: (206) 684-8600
Inspections and closing out your permit
Pool inspections track the concrete pour: the steel and bonding grid are checked before gunite or shotcrete goes in, bonding is checked again before decking is poured, and the permanent barrier and remaining electrical work are checked at final before the pool can be filled and used.
- Before gunite or shotcrete is sprayed, the inspector checks the rebar against the engineered plans and confirms the equipotential bonding wire is stubbed out and tied into the steel, since it will be buried in concrete afterward (NEC 680.26).
- A bonding inspection separately confirms coping, decking, ladders, handrail cups, and any other metal within 5 feet of the water are tied to the bonding grid, and it must pass before coping is installed (NEC 680.26).
- A temporary barrier at least 4 feet high must enclose the site from the moment excavation starts until the permanent barrier is finished, and inspectors check for it throughout construction (ISPSC 305.1.1).
- A pre-plaster inspection confirms the circulation equipment's electrical work is installed and all bonding is complete before the pool's interior finish goes on (NEC 680.26).
- At final inspection the permanent barrier is checked against the code's requirements and the equipment and cover-mechanism bonding must be complete before the pool can be filled and used (ISPSC 305, NEC 680.26).
Schedule each inspection in advance and pass the final before you use the work or close the permit. Request inspections through the Seattle permit portal or by phone at (206) 684-8600.
Inspection sequence from NEC 2020 Article 680.26 (equipotential bonding) and ISPSC 2021 Section 305 (barriers). Source. An open permit left un-inspected can surface later in a title search or home sale.
Your Pool Permit checklist for Seattle
- Confirm the requirement. Yes, a permit is required. Usually needed: Before installing any residential swimming pool or hot tub in Seattle.
- Budget the fee. An unenclosed pool accessory to a single-family or duplex home is a flat fee of four times the $292 SDCI base fee, $1,168, plus a 5% technology fee, per Fee Subtitle Table D-2 item 17a; a pool inside an enclosed building on the building plans carries no separate fee. Official fee schedule.
- Apply. A residential pool permit application covers both construction and safety: a scaled site plan, structural plans for the pool, a barrier plan showing how the pool will be enclosed, and an electrical plan covering bonding and the equipment disconnect. Start at the Seattle permit portal.
- Keep the office details handy. Seattle Department of Construction and Inspections. Phone: (206) 684-8600. Address: 700 5th Ave Suite 2000, Seattle, WA 98104.
- Plan for inspections. Pool inspections track the concrete pour: the steel and bonding grid are checked before gunite or shotcrete goes in, bonding is checked again before decking is poured, and the permanent barrier and remaining electrical work are checked at final before the pool can be filled and used.
Compiled from the official sources on this page. Last checked 2026-06-18.
The checklist stays on this page either way. We may send occasional verified rule-change notes for your area; unsubscribe anytime. See our privacy policy.
Permitting activity in Seattle
In 2024, Seattle authorized permits for 5,895 new residential housing units (405 single-family, 5,490 in multi-family buildings), valued at $1.2B, up from5,299 the year before. That works out to about 7.7 permits per 1,000 residents.
Source: U.S. Census Bureau, Building Permits Survey, 2024 annual data · population 769,714.
About Seattle
Seattle has about 382,933 housing units. The median home is valued at $912,100, against a median household income of $121,984. About 44% of homes are owner-occupied, and the typical home was built around 1974.
Source: U.S. Census Bureau, American Community Survey 2023 5-year.
Frequently asked questions
- Do you need a pool permit in Seattle?
- A building permit is required for residential swimming pool and hot tub installations in Seattle. The SDCI do-you-need-a-permit page lists pools as a project type requiring a permit. Fencing and safety barrier requirements also apply. Contact SDCI at (206) 684-8600 to confirm specific submittal requirements for your pool type. Always confirm with the Seattle Department of Construction and Inspections before starting.
- How much does a pool permit cost in Seattle?
- An unenclosed pool accessory to a single-family or duplex home is a flat fee of four times the $292 SDCI base fee, $1,168, plus a 5% technology fee, per Fee Subtitle Table D-2 item 17a; a pool inside an enclosed building on the building plans carries no separate fee. See the official fee schedule for current amounts.
- Where do you apply for a pool permit in Seattle?
- You can apply through the Seattle permit portal or contact the Seattle Department of Construction and Inspections directly. The links are listed on this page.
From the Library
What else needs a permit in Seattle
Every other permit type we have verified for this jurisdiction, with the rule that applies here.
| Project | Permit needed? | Threshold | Typical fee |
|---|---|---|---|
| Deck Permit | It depends | decks more than 18 inches above grade require a permit; decks 18 inches or less above grade and not over a basement do not require a permit | Priced as a subject-to-field-inspection or addition/alteration construction permit by p... |
| Electrical Permit | Permit required | Not specified | Itemized per Fee Subtitle Table D-15: minimum $105.12 for a standard online self-issued... |
| Fence Permit | It depends | fences under 8 feet with no masonry or concrete elements exceeding 6 feet do not require a permit | Fences 8 feet or less with no masonry or concrete elements over 6 feet need no permit p... |
| HVAC Permit | Permit required | Not specified | Ducted HVAC systems are priced by project valuation with a $292 minimum; |
| Patio Permit | No permit needed | Not specified | No standalone patio permit; |
| Plumbing Permit | Permit required | Not specified | No SDCI fee; |
| Roof Replacement Permit | No permit needed | Not specified | One and two family homes need no permit for a straight reroof that does not change the... |
| Shed Permit | It depends | one-story detached storage sheds with a roof footprint of 120 square feet or less on a slab foundation and not in an environmentally critical area do not require a permit | Sheds of 120 square feet or less that are single story, unattached, and storage-only ne... |
| Solar Permit | Permit required | Not specified | Solar PV is permitted through the electrical permit: systems below 12kW are a flat $438... |
Pool Permit in other Washington localities
Official sources
Verified by a person against the sources above on 2026-06-18, not confirmed with Seattle Department of Construction and Inspections. Rules change; confirm before you build. How we verify.
Last checked: 2026-06-18Report an error on this page
Compare Pool Permit requirements across Washington localities
Washington rule changes
- Bellevue, WA sets a flat $290 re-roof permit fee (Ordinance 6879)
Ord. 6879 · 2026-07-25