Benton County, WA Accessory Structures: Shed & Carport Rules (2026)
Shed permit rules in Benton County, WA, also referred to as storage shed, backyard shed, or accessory building regulations, set size limits, setbacks, and when a building permit is required.
Key Facts
- District
- Community Center Residential District (CCR), BCC 11.06
- Rear/side setback
- 10 feet from rear and side property lines
- Front setback
- 55 feet from road centerline or 25 feet from ROW line
- Max lot coverage
- 40 percent of the parcel, BCC 11.06.080(c)
- Livestock shelter setback
- 30 feet from every property line
- First violation penalty
- Civil penalty up to $500, BCC 11.43.170
Summary
In the Community Center Residential District, Benton County caps a parcel's total lot coverage at 40 percent and holds detached sheds and other accessory buildings to a 10-foot setback from the rear and side property lines, under BCC 11.06.080 and 11.06.090. A shed still has to meet the same front setback that applies to the house.
11.06.080 PROPERTY DEVELOPMENT STANDARDS-GENERAL STANDARDS... (c) Maximum Lot Coverage. Each parcel shall have a maximum lot coverage of forty (40) percent... 11.06.090 PROPERTY DEVELOPMENT STANDARDS--SETBACK REQUIREMENTS. All lands, structures, and uses in the Community Center Residential District (CCR) shall meet the following setback requirements... (a) Setback Requirements. The following minimum setbacks shall apply: (1) Each dwelling unit, accessory building, and accessory use on a parcel shall have a setback of fifty-five (55) feet from the centerline of any public road right-of-way or twenty-five (25) feet from the property line bordering any public road right-of-way, whichever is greater... (3) Each accessory building and accessory use shall have a setback of ten (10) feet from all alleys and the rear parcel lines. (4) Each dwelling unit, accessory building, and accessory use on a parcel shall have a setback of ten (10) feet from the side parcel lines.
Full Breakdown
Benton County's Community Center Residential District (CCR), the standard residential zone across most of unincorporated Benton County, allows one or more accessory buildings on a single-family parcel as an accessory use under BCC 11.06.040(a); no separate use permit is required for an ordinary shed, garage or outbuilding appurtenant to the house. Dimensionally, BCC 11.06.090(a)(3) sets a 10-foot setback for any accessory building or accessory use from all alleys and the rear parcel line, and BCC 11.06.090(a)(4) applies the same 10-foot minimum from the side parcel lines.
A shed does not get a break on the front yard: BCC 11.06.090(a)(1) requires every accessory building, like the dwelling itself, to sit at least 55 feet from the centerline of a public road right-of-way, or 25 feet from the property line bordering that right-of-way, whichever is greater. Coverage is capped too: BCC 11.06.080(c) limits the whole parcel, house, shed and all, to 40 percent maximum lot coverage, and BCC 11.06.080(d) requires at least 45 percent of the lot to stay in vegetative cover unless that would block the development entirely.
A shed used to shelter livestock, such as a coop or barn, is held to a stricter 30-foot setback from every property line under BCC 11.06.090(a)(5). Building a shed still requires a county building permit under Title 3 of the Benton County Code, administered by the Planning and Building Department; BCC 11.42.040(a) bars erecting, adding to, or altering any building or structure without complying with that title.
Violations & Fines
A first violation of the CCR setback or lot-coverage standards is an infraction carrying a civil penalty of up to $500 plus court costs and restitution under BCC 11.43.170; a second violation of the same rule becomes a misdemeanor. The Planning Administrator or Building Official can also pursue an injunction under BCC 11.43.030 to compel removal or relocation of a shed built in violation, with legal costs taxed against the property owner.
Frequently Asked Questions
How close to my property line can I put a shed in Benton County?
Do I need a permit to build a shed?
Is there a limit on how much of my lot a shed and house can cover?
Sources & Official References
Other rules in Benton County
How Benton County compares: Shed Permit Requirements by City·Compare Benton County to another location·View the Washington accessory structures overview
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