Seattle, WA Home Business: Signage Rules (2026)
Key Facts
- Size cap
- 5 square feet, all zones
- NR zones
- Nonilluminated only
- Multifamily/NC1/NC2
- Electric or nonilluminated allowed
- Sign motion
- No flashing or rotating signs
- Roof signs
- Not permitted
Summary
A Seattle home business may post exactly one sign in a residential zone, and SMC 23.55.020.D.8 caps it at 5 square feet and requires it to be nonilluminated, no backlighting, neon, or electric elements, while SMC 23.42.050.D.3 makes any home occupation sign subject to the full Chapter 23.55 sign code.
A.Signs shall be stationary and shall not rotate.B.No flashing, changing-image or message board signs shall be permitted.C.No roof signs shall be permitted.D.The following signs are permitted in all neighborhood residential zones:1.Electric, externally illuminated or nonilluminated signs bearing the name of the occupant of a dwelling unit, not exceeding 64 square inches in area;...8.One nonilluminated sign bearing the name of a home occupation not exceeding 5 square feet in area.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Municipal Code: Supplement 44 Update 1).
Full Breakdown
55, the citywide Sign Code. 8 allows exactly one home occupation sign, capped at 5 square feet, and it must be nonilluminated: no backlit, neon, or electric elements are permitted there. f extends that same electric-or-nonilluminated, 5-square-foot allowance to home occupations in NC1 and NC2 neighborhood commercial zones. 020: the sign must be stationary and cannot rotate, it cannot flash or use a changing-image or message-board display, and it cannot be mounted as a roof sign. Because the sign is treated as accessory to the home occupation itself rather than as a standalone commercial sign, SDCI still reviews it against these limits when it processes complaints or a related business license application. 050.
Violations & Fines
An oversized, illuminated, or flashing home occupation sign is a Land Use Code violation under Chapter 23.90 rather than the animal-keeping citation schedule in Chapter 23.91. SDCI can issue a notice of violation requiring the sign be resized, relocated, or removed within a set compliance deadline, and a Stop Work Order can follow if the violation continues after that deadline passes.
Frequently Asked Questions
How big can my home business sign be in Seattle?
Can my home business sign light up?
Can my home occupation sign flash or rotate?
Sources & Official References
Other rules in Seattle
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