Thurston County Fence Permit Guide: What Tumwater and Olympia Homeowners Need to Know in 2026

Planning a fence project in Tumwater, WA, or nearby Olympia? Understanding Thurston County's permit rules before fence installation begins can save you time, money, and a costly do-over. The rules are more specific than many homeowners expect, and the differences between cities matter. This guide covers when a permit is required, what height limits apply, how to apply correctly, and the most common mistakes that slow things down.

Do You Actually Need a Permit for Fence Installation in Thurston County?

The answer depends on where your property is located and how tall your fence will be.

Unincorporated Thurston County: Fences 8 feet tall or shorter do not require a building permit. Fences at or near street corners or driveways still need a sight distance triangle review.

City of Tumwater: Fences not over 7 feet high are exempt from a building permit. Fences not over 8 feet high used for agricultural purposes of a common deer fence design are also exempt. The city's permit office notes that inspections are triggered for fences greater than 6 feet, 6 inches in height.

City of Olympia: Fences not over 6 feet high are allowed without a permit. A deer fence may be 8 feet high when approved. A building permit is required for all fences exceeding 7 feet.

The key takeaway: Tumwater's threshold is higher than Olympia's for standard fences. Knowing which jurisdiction covers your address is step one.

What Are the Height Limits by Zone?

Height rules vary by yard location and zone type. Getting this wrong is one of the most common reasons projects get flagged.

Tumwater Urban Growth Area (UGA) Height Limits

For properties in the Tumwater UGA under Thurston County zoning, residential front yards have a maximum height of 42 inches. Side yards and rear yards allow up to 78 inches. That works out to 3.5 feet in front and 6.5 feet on the sides and rear.

City of Olympia Height Limits

Olympia draws the same front-versus-rear distinction. Within a required setback area, the front yard (the first 10 feet of the lot) is limited to 4 feet, while side and rear yards allow up to 6 feet. Exceeding those heights in required setback areas requires an administrative exception or a variance.

Corner Lots and Sight Lines

Both cities pay extra attention to corner lots. Fences near intersections must preserve driver visibility. If your property sits on a corner or near a driveway approach, check the sight distance triangle rules with your local permit office before drawing any plans.

How to Apply for a Fence Permit in Thurston County

A state law referred to as SB 5290 reduces permitting timelines, and to comply, application packets must now be complete to be accepted. Incomplete submissions will be turned away at the counter.

Here is a general sequence for homeowners planning fence installation in Tumwater, WA, or the surrounding area:

• Check your jurisdiction first. Tumwater city limits, the Tumwater UGA, and unincorporated Thurston County all have different rules.
• Confirm proximity to critical areas. A critical areas review is required if a project is within 400 feet of critical areas.
• Gather your documents. Find the right forms for your project on the county's Applications and Forms page.
• Submit a complete packet. Only complete application packages are accepted at time of submittal.
• Pay fees at submission. Fees are due at submittal, payable by cash, check, or credit card.

For timeline planning, a basic residential permit can take up to 12 weeks. More complicated projects and land-use reviews can take up to a year.

Common Mistakes That Delay Fence Permit Approval

These are the errors that come up most often in Thurston County.

• Submitting an incomplete packet. Since 2025, the county only accepts complete submissions. Missing a single form means starting over.
• Ignoring the sight distance triangle. Corner and driveway-adjacent fences require extra clearance. Skipping this step can mean a mandatory fence removal.
• Mixing up Olympia and Tumwater rules. The cities share borders but not the same code. A 6.5-foot side yard fence allowed in the Tumwater UGA may exceed what Olympia permits in the same location.
• Missing the barbed wire rules. No fence shall contain barbed wire or electrical current, except where a legally established use exists for the containment of animals or protection of property from animals.
• Building before calling 811. Before anyone digs, call Washington 811 to locate underground utilities. It is free and it is the law.

If your neighborhood has an HOA, keep in mind that HOA approval and a city or county permit are two separate steps. Approval from one does not cover the other.

Ready to Move Forward With Your Fence Project?

Navigating Thurston County's permit rules is manageable once you know which jurisdiction applies and what your height limits are. The permit thresholds in Tumwater and Olympia differ in meaningful ways, and the 2025 changes to submittal requirements mean preparation matters more than ever. Choosing the right fence installation approach from the start helps avoid costly revisions down the road.

If you want a fence contractor who already knows the local rules, Southgate Fence has been serving Thurston County for decades and understands what it takes to get a project approved and built right. Visit the contact page or browse wood and chain link fence installation options to see what works for your property. Call (360) 352-3934 to get started.