Seattle, WA Fence Regulations: Fence Permit Requirements (2026)
Key Facts
- Permit Exempt
- 8 feet or shorter, non-masonry above 6 ft
- Residential Max
- 6 ft side/rear, 4 ft front
- Flood Zones
- Additional review required
- Retaining Walls
- Permit required over 4 feet
Summary
Most residential fences in Seattle do not require a building permit. Fences 8 feet or shorter without masonry or concrete above 6 feet are exempt. Fences in flood-prone areas, shoreline zones, or environmentally critical areas may need additional review.
What Permits Do You Need? You don't need a permit if you're building a fence with a total height of 8 feet high or less that doesn't have masonry or concrete elements over 6 feet. You will need a construction permit if the fence will be located in a flood-prone area. If you're building a taller fence, you need a construction permit. Most fences require only a construction subject-to-field-inspection permit. For your permit application, you'll need to submit an application and your scaled plans, including a site plan and section and detail drawings. Tip 103, Site Plan Requirements. Research the Code — In neighborhood residential and multifamily zones, our zoning code limits your fence height to 6 feet, with an additional 2 feet of architectural features such as arbors or trellises. We limit the height of the fence to 4 feet when it is located in a front or street side setback. [...] If you want to build near an environmentally critical area, such as a wetland or steep slope, there are different restrictions you must follow. Environmentally Critical Areas Code; Seattle Residential Code, Chapter 1, Section R105.2; Zoning Code.
Full Breakdown
Seattle's SDCI does not require a building permit for fences that are 8 feet or shorter in height and do not have masonry or concrete portions above 6 feet. This exemption covers most residential wood, vinyl, chain-link, and composite fences. In neighborhood residential zones, maximum fence height is 6 feet in side and rear yards (with up to 2 additional feet of trellis) and 4 feet in front yards. Fences that include masonry or concrete elements above 6 feet require a construction permit and structural review. Fences in flood-prone areas require review to ensure they do not obstruct flood flows. Fences in shoreline districts or environmentally critical areas may require additional environmental review. Retaining walls over 4 feet also require permits. Property line disputes should be resolved through a survey before fence construction. If the fence will be on or near the property line, SDCI recommends confirming the boundary with a licensed surveyor.
Violations & Fines
Fences exceeding height limits: Notice of Violation from SDCI. Fences in restricted areas without approval: required removal or modification.
Frequently Asked Questions
Do I need a permit to build a fence in Seattle?
What is the maximum fence height in Seattle residential areas?
Sources & Official References
Other rules in Seattle
Compare Seattle to another location·View the Washington fence regulations overview
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Fence Permit Requirements in Nearby Cities
How other cities in King County handle fence permit requirements.