Kitsap County, WA Home Business: Signage Rules (2026)

275. The lowest, no-permit incidental tier is the strictest: subsection (C)(11) allows no signs at all to advertise the business or occupation on the premises, with a single narrow exception for a sign attached to the mailbox that does not exceed one square foot. Any freestanding, window, or building-mounted sign beyond that mailbox tag disqualifies the operation from the incidental tier. Businesses that need real signage must instead qualify for the minor tier, capped at thirty percent of the home's gross floor area and two employees, or the moderate tier, capped at five employees.

Both of those tiers, under (D)(7) and (E)(6) respectively, allow a nonilluminated sign not exceeding four square feet, but only if it is subject to a sign permit approved by the director; the sign cannot be lit, and four square feet is a hard ceiling regardless of the size of the business or lot. Because minor and moderate approvals are not transferable to a new owner or location, a sign permit approved for one operator does not carry over if the business changes hands or moves.

The director can also attach further conditions on any of these tiers to protect the residential character of the neighborhood, on top of the numeric sign limit itself.