Kennewick's Fence Regulations: The Rules That Matter

Every city handles fence regulations a little differently. In Kennewick, Washington, there are 5 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Height Limits

Under Kennewick Municipal Code Chapter 18.27 (Accessory Buildings, Structures and Uses), fences in residential zones are limited to 36 inches in a required front yard, 30 inches within a sight-distance triangle, and 6 feet above grade elsewhere on the site. Fences over 36 inches must be built with steel or pressure-treated wood posts, and over-height fences require a variance.

Key details: Front Yard Max: 36 inches (residential). Side / Rear Max: 6 feet. Sight Triangle: 30 inches max. Post Standard: Steel or pressure-treated over 36 in. Governing Code: KMC Chapter 18.27.

Building or zoning violations are enforced by Kennewick Code Enforcement under KMC Title 18 and Title 1. A Class 1 civil infraction can carry monetary penalties up to several hundred dollars per day under KMC 1.04, with each day a continuing violation being a separate offense. The city may issue a stop-work order and compel removal of an over-height or sight-triangle-obstructing fence at the owner's expense.

Pool Barriers

Pool barriers in Kennewick are governed by the International Swimming Pool and Spa Code and IBC Appendix G, both adopted by reference in the Washington State Building Code at WAC 51-50, and implemented locally through Kennewick Municipal Code Chapter 15.44 (Swimming Pool Code). A residential pool barrier must be at least 48 inches high, climb-resistant, with self-closing/self-latching gates and openings small enough that a 4-inch sphere cannot pass.

Key details: Governing Codes: IBC App. G / ISPSC via WAC 51-50. Minimum Height: 48 inches. Sphere Test: No 4-inch sphere passable. Gate: Self-closing, self-latching, opens outward. Dwelling Wall Doors: Alarm (UL 2017) or self-closing.

Failure to install a code-compliant barrier is a State Building Code violation enforced by Kennewick Code Enforcement under RCW 19.27 and KMC Title 15. Penalties include stop-work orders, refusal of the final inspection and certificate of occupancy, daily Class 1 civil infraction fines under KMC 1.04, revocation of the pool building permit, and personal civil liability to any drowning victim under Washington premises-liability law.

Compared to other cities, Kennewick takes a harder line on pool barriers. The enforcement and penalty structure reflects that.

Permit Requirements

Most residential fences six feet or less in height in Kennewick do not require a separate building permit under WAC 51-50 (the adopted Washington State Building Code, IBC Section 105.2 exemption), but all fences must comply with the zoning, sight-triangle, and material standards in Kennewick Municipal Code Chapter 18.27. Pool barriers and over-height fences do require a permit.

Key details: By-Right Exempt: Most residential fences <=6 ft. Permit Trigger: >6 ft, pool barrier, or commercial. Submittal: Plot plan, height, materials. Finished Side: Faces neighbor. Issuing Division: Kennewick Building Division.

Building or installing a fence without a required permit, or in violation of KMC Chapter 18.27, is a code-enforcement matter. The city may issue a stop-work order, impose Class 1 civil infraction penalties under KMC 1.04, order removal of the fence, and refuse a certificate of occupancy or final inspection for related construction.

Neighbor Fence Rules

Boundary, partition-fence, and 'spite fence' disputes in Kennewick are governed by Washington State common law and statute, not the city zoning code. RCW Chapter 16.60 addresses livestock/partition fence cost-sharing in rural areas, and Washington recognizes the common-law spite-fence doctrine as a private nuisance. Kennewick Municipal Code Chapter 18.27 sets height and location but does not resolve private boundary disputes.

Key details: Spite-Fence Basis: WA common-law nuisance (RCW 7.48). Livestock / Partition: RCW Chapter 16.60. Adverse Possession: 10 years (RCW 7.28.050). Court: Benton County Superior Court. City Code Limit: Zoning only (KMC 18.27).

Spite-fence and nuisance relief in Washington is civil: actual damages, an injunction to remove or modify the fence, and in some cases attorneys' fees. Zoning-permit violations of height or sight-triangle rules are enforced by Kennewick Code Enforcement under KMC Title 1 (see fences/height-limits). Boundary encroachments are resolved through quiet-title litigation in Benton County Superior Court.

Approved Materials

Kennewick Municipal Code Chapter 18.27 does not prescribe a closed list of permitted fence materials, but requires that all fences over 36 inches use steel or pressure-treated wood posts. Barbed wire, electric, and razor wire are generally prohibited in residential zones. Standard materials - wood, vinyl, aluminum, ornamental iron, chain link - are permitted subject to the height and 'good side out' rules.

Key details: Common OK: Wood, vinyl, aluminum, chain link. Post Standard: Steel or pressure-treated >36 in. Barbed / Razor: Prohibited in residential. Electric Fences: Restricted (ag/industrial only). Pool Barriers: Stricter IBC App. G / ISPSC rules.

Installing prohibited materials such as barbed or electric wire in a residential zone, or building a fence over 36 inches without code-compliant posts, is a zoning violation enforced by Kennewick Code Enforcement under KMC Title 1. Class 1 civil infractions, daily penalties, and orders to remove or rebuild the fence at the owner's expense can all result. The city may refuse a certificate of compliance for related construction.

The Bottom Line

Kennewick's fence regulations rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Kennewick is broadly strict or permissive.

This guide is based on Kennewick's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.