Seattle, WA Sign Regulations: Freeway-Facing Signs (2026)
Key Facts
- Governing section
- SMC 23.55.042
- Buffer from designated freeways
- 660 feet from main traveled way
- Ramp buffer
- 200 feet from entrance/exit ramps
- Covered freeways
- I-5, I-90, SR 520, West Seattle Freeway
- Type B corridors
- 15 additional scenic streets listed
- Exception process
- discretionary Type I decision, Ch. 23.76
- Civil penalty
- $150/day, then $500/day (SMC 23.90.018)
Summary
SMC 23.55.042 bars new off-premises and business signs within 660 feet of designated scenic freeway sections, including I-5, I-90, the West Seattle Freeway, and SR 520, and within 200 feet of their ramps if visible from the roadway. A narrow list of on-premises business signs is allowed outright; almost everything else needs a discretionary Type I exception.
B.Off-premises and Business Signs Prohibited Near Certain Areas. No off-premises sign or business sign shall be erected within six hundred sixty (660) feet outgoing from the nearest edge of the main traveled way of any landscaped and/or scenic view section of a freeway, expressway, parkway or scenic route designated by this subsection and shown on Exhibit 23.55.042 A (Type A sections), and no off-premises sign shall be erected within two hundred (200) feet in any direction from the main traveled way of the exit and entrance ramps thereto, if any part of the advertising matter or informative content of the sign is visible from any place on the traveled way of the landscaped and/or scenic view section or ramp, except as provided in subsections C and D:1.West Seattle Freeway from Harbor Avenue S.W. to 35th Avenue S.W....3.Interstate Highway No. 5 from the north City limits to the south City limits;4.Interstate Highway No. 90 from the east City limits to Interstate Highway No. 5;5.State Route 520 (Evergreen Point Bridge) to Interstate Highway No. 5.
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
Enacted to implement the state Highway Advertising Control Act, subsection B bans erecting any off-premises or business sign within 660 feet of the main traveled way of designated "Type A" landscaped or scenic freeway sections, the West Seattle Freeway, both sides of the Alaskan Freeway between South Connecticut Street and the Battery Street Tunnel, Interstate 5 for its full run through the city, Interstate 90 from the east city limits to I-5, and SR 520 (Evergreen Point Bridge) to I-5, plus a 200-foot buffer around their entrance and exit ramps, wherever the sign is visible from the traveled way.
Subsection C carves out a narrow list of on-premises business signs allowed outright on those sections: building-face signs up to 10 percent of the facade or 250 square feet, freestanding business signs up to 75 square feet and 30 feet tall, real estate signs up to 50 square feet total, and gas station signs up to 150 square feet per face and 250 square feet combined. 76 for specific sign types, painted-letter signs, marquee extensions, time/temperature displays, only if the exception won't obscure official traffic signs, won't push sign density into a traffic hazard, and won't block a scenic view.
Subsection E extends the same 660-foot and 200-foot buffers, with no exceptions carve-out, to 15 additional "Type B" corridors: Aurora Avenue North, Dexter Avenue North, Westlake Avenue North, Fairview Avenue, Lake Washington Boulevard, the streets ringing Green Lake, the perimeter of Seattle Center, and several others. 050.
Violations & Fines
An off-premises or business sign erected in violation of the 660-foot or 200-foot buffers is a Title 23 land use violation. SDCI issues a notice of violation, and the City Attorney prosecutes noncompliant cases in Seattle Municipal Court, with civil penalties under SMC 23.90.018.A running up to $150 per day for the first ten days of noncompliance and up to $500 per day after that until the sign is removed or brought into compliance.
Frequently Asked Questions
Can I put up a billboard near I-5 in Seattle?
What signs are still allowed near these freeway corridors?
Which streets besides interstates are covered by this rule?
Is there any way to get an exception to the freeway sign ban?
Sources & Official References
Other rules in Seattle
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Freeway-Facing Signs in Nearby Cities
How other cities in King County handle freeway-facing signs.