Grays Harbor County, WA Accessory Structures: Shed & Carport Rules (2026)
Shed permit rules in Grays Harbor 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
- Permit-exempt shed size
- Detached, one-story, up to 200 sq ft
- Still required
- Title 17 setbacks, Title 18 critical areas
- Over 200 sq ft
- Building permit required
- Unpermitted work fee
- Investigation fee equals permit fee
Summary
A detached tool shed or playhouse under 200 square feet does not need a county building permit in unincorporated Grays Harbor County, but it must still meet Title 17 zoning setbacks and Title 18 critical area rules; anything larger needs a permit from the building official.
Permits shall not be required for the following: ... Building: ... (1)One-story detached accessory structures used as tool and storage sheds, playhouses and similar uses, provided the floor area does not exceed two hundred square feet, and provided the structure complies with the building setback requirements set forth in Title 17 of this code governing zoning and Title 18 of this code governing critical area protection.
Full Breakdown
Grays Harbor County's amended International Building Code, § 15.04.020(K), exempts a narrow category of accessory structures from the county's building permit requirement. Item (1) of that list covers one-story detached accessory structures used as tool and storage sheds, playhouses, and similar uses, so long as the floor area does not exceed 200 square feet and the structure still complies with the building setback requirements of Title 17 zoning and the critical area protection requirements of Title 18. A shed that exceeds 200 square feet, or that isn't a detached, one-story tool/storage/playhouse use, falls under the general permit requirement of amended IBC § 105.1 (§ 15.04.020(I)) instead, meaning the owner must apply to the building official before building it.
The exemption does not touch zoning: even a permit-exempt shed must sit within whichever front, side, and rear yard the applicable zoning district requires under Title 17, and outside any critical area buffer established under Chapter 18.06. Submittal, when a permit is required, follows the same two-set document rule the county applies generally under amended § 107.1, and the permit is not valid until the fee is paid under amended § 109.1.
Violations & Fines
A shed built over the 200-square-foot exemption threshold without a permit exposes the owner to the investigation fee under amended § 109.4, equal to the regular permit fee, charged in addition to it once discovered, whether or not a permit is later issued. Building the shed inside a required setback or a Title 18 critical area buffer is a separate violation even if the structure itself is permit-exempt from the building code.
Frequently Asked Questions
Can I build a storage shed without a permit?
Does a permit-exempt shed still have to meet setback rules?
What if my shed is bigger than 200 square feet?
Sources & Official References
Other rules in Grays Harbor County
How Grays Harbor County compares: Shed Permit Requirements by City·Compare Grays Harbor County to another location·View the Washington accessory structures overview
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