Building Permits in Seattle, WA

Check permit requirements for home improvement projects in Seattle. Select a project type below to see local requirements, estimated fees, and how to apply.

54 Permit Rules

15 Project Types

$60 – $6,000 Permit Fee Range

IRC 2021 Building Code

Key Exemptions in Seattle

These projects typically don't require a building permit in Seattle:

Cosmetic bathroom renovations do not require a permit in Seattle, WA.

Freestanding decks not exceeding 30 inches above grade are exempt in Seattle, WA.

Replacing a fixture in-kind does not require a permit in Seattle, WA.

Fences 6 feet or under do not require a permit in Seattle, WA.

Small detached structures (120 sq ft or less) may be exempt in Seattle, WA.

See all rules by selecting a project type below, or use our free lookup tool for a personalized answer.

4 rules

3 rules

3 rules

3 rules

3 rules

4 rules

4 rules

Swimming Pool / Hot Tub

3 rules

4 rules

4 rules

4 rules

5 rules

3 rules

4 rules

3 rules

Get a personalized answer

Our lookup tool asks a few questions about your specific project to give you the most accurate answer.

Check Your Project →

Seattle Building Department

NameSeattle Department of Construction & Inspections (SDCI)

Phone(206) 684-8600

WebsiteVisit website

Address700 5th Ave., Suite 2000, Seattle, WA 98104

HoursMon/Wed/Fri 9am-3pm, Tue/Thu 10:30am-3pm

Nearby Cities in Washington

Spokane Tacoma Bellevue Spokane Valley Federal Way Kennewick Pasco Richland

Permit Guides

Read our in-depth guides for common home improvement projects:

Deck Guide Fence Guide Shed Guide Roof Guide Bathroom Guide Kitchen Guide Pool Guide Electrical Guide Plumbing Guide HVAC Guide Garage Guide Addition Guide Basement Guide

Disclaimer: Always confirm with your local building department before starting your project. PermitMint provides general guidance, not legal advice.