Sheds

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Sheds are common accessory structures for storing lawnmowers, bikes, tools, and other household items. In most cases, a building permit is not required for a shed in single-family residential areas (R-4 and R-6 zones), however certain limitations apply:

Size Limits:

Maximum height: 8 feet (flat roof) or 10 feet (pitched roof)
Maximum dimension: 15 feet on any side
Maximum area: 200 square feet

Only one shed is allowed per property
The shed must be detached (attached or lean-to sheds do require a permit)
No placement in critical areas or buffers
Must meet setback requirements (see KMC 18.21.030)

Per KMC 18.30.230(Q), sheds may be located as close as 5 feet from the rear property line if they do not create substantial detrimental impacts to neighbors or the city

Should be located outside the critical root zones of trees
Cannot be used as a living space
Sheds are for storage only. They are not allowed to be used as guest houses, backyard offices, or any other habitable space. If you want a detached structure for people to occupy, a building permit is required.
Electrical work may require a separate permit
If you plan to add power, you may need an electrical permit through Labor & Industries (L&I) — please confirm with them directly.

Shed Requirements

Still not sure?
If you're unsure whether a permit is needed or need help interpreting the rules, please email us at permittech@kenmorewa.gov. Include your address, shed size, proposed location, and any other relevant details. We're happy to help!