Do you need a shed permit in Washington?
By Mario Bailey Last checked
- Always required
- 0
- of 8 jurisdictions
- Conditional
- 8
- depends on size or scope
- Not required
- 0
- exempt outright
Shed Permit rules nationwide, beyond Washington.
Requirements and size thresholds for shed permits vary by locality. The table below compares what each Washington county or city requires. Always confirm with the local office before starting.
Comparing states? See shed permit rules across every locality we cover.
The application steps and inspection sequence for shed permits come from the model code rather than from Washington law, so they read the same wherever you build. We keep that walkthrough in one place: how a shed permit application and its inspections work, start to finish. What changes between Washington jurisdictions is below: who requires a permit, what they charge, and which office you file with.
Swipe sideways to see thresholds and confidence.
| Locality | Permit required? | Typical threshold | Confidence |
|---|---|---|---|
| Bellevue | Conditional | detached storage sheds playhouses or gazebos with a floor area of 200 square feet or less do not require a building permit; structures over 200 square feet require a permit | Confirmed on official page |
| Clark County | Conditional | Sheds over 200 square feet require a building permit; sheds of 200 square feet or less are exempt if they meet setbacks and easements, but any size shed in a mobile home park or multi-family zone requires a permit. | Confirmed on official page |
| King County | Conditional | storage sheds 200 sq ft or less as accessory to a residential house do not require a building permit in unincorporated King County; sheds over 200 sq ft require a permit | Confirmed on official page |
| Pierce County | Conditional | One-story detached accessory structure used as an unheated tool or storage shed, playhouse, or similar use is exempt if its floor area is 200 sq ft or less and it is at least 3 feet from a property line; larger or closer structures require a building permit. | Confirmed on official page |
| Seattle | Conditional | one-story detached storage sheds with a roof footprint of 120 square feet or less on a slab foundation and not in an environmentally critical area do not require a permit | Confirmed on official page |
| Snohomish County | Conditional | one-story detached accessory structure not used for human habitation (tool/storage shed, playhouse) exempt if floor area is 200 sq ft or less and sidewalls 9 ft or less inside the Urban Growth Area (UGA), or 400 sq ft or less and sidewalls 11 ft or less outside the UGA; larger structures require a building permit | Confirmed on official page |
| Tacoma | Conditional | one-story detached accessory structures with a floor area of 200 square feet or less do not require a building permit; structures over 200 square feet require a permit | Confirmed on official page |
| Thurston County | Conditional | One-story detached accessory buildings with no plumbing or electricity are exempt if under 200 square feet inside a county urban growth area or under 400 square feet outside a UGA. | Confirmed on official page |
| No localities match your filter. | |||
What a shed permit costs in Washington
6 Washington jurisdictions we cover publish a fee figure for this work. Each line is quoted from that office's own schedule and linked to its citation. The figures are not comparable to one another: some are flat minimums, some a percentage of job value, some charged per fixture, so what you pay depends on which schedule applies and on your job's valuation.
No separate shed line item; a shed needing a permit is a building permit by valuation per Table 4 of Ordinance 6879, $44 inspection fee minimum plus plan review at 65% plus a $25 state building code fee, effective 2026-01-01
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Most permit fees increased approximately 14% on January 1 2026 plus a $126 application screening fee
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Building permit fee follows PCC Table 17C.10-1-B (valuation based): $69.00 for construction valued at $500 or less, plus $2.00 for each additional $100 or fraction up to $2,000, plus a plan review fee equal to 65 percent of the building permit fee (PCC Table 17C.10-1-C).
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Sheds of 120 square feet or less that are single story, unattached, and storage-only need no permit per SDCI's Sheds page; larger sheds take a subject-to-field-inspection construction permit priced by valuation, minimum $292, plus a 5% technology fee, per the 2026 Fee Subtitle
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Base application fee $150 per application plus 3% technology surcharge and $6.50 Washington State building permit surcharge; the permit fee itself scales with the county's valuation-based fee table
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Sheds 200 square feet or larger need a permit priced from $55 for the first $500 of valuation plus $32 per $100 over $500, per the PDS Fee Schedule effective 1/1/2025
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Jurisdictions not listed publish no dollar figure we could quote. Absence does not mean a permit is free.
Common questions about shed permits in Washington
- Do I need a shed permit in Washington?
- In Washington it depends on the size of the job. Permits are issued locally, so the answer comes from your Washington city or county rather than a single statewide rule. Of the 8 Washington jurisdictions we have verified for shed work, 0 require a permit outright, 8 depend on the size or scope of the job, and 0 require none.
- Is there a shed permit exemption in Washington?
- 8 of the 8 Washington jurisdictions we cover set a threshold rather than a flat rule, so the same job can be exempt in one Washington county and permitted in the next. The table above lists each Washington jurisdiction's published threshold in its own words, with the source and the date we verified it.
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