Sign Regulations in Mercer Island, Washington
Mercer Island, Washington has specific sign regulations covering 13 sign types across 6 zoning districts. Regulated sign types include Wall Sign, Freestanding Ground Sign, Electronic Readerboard (Option for Public Schools). Height restrictions apply. Permits are required for most commercial signs. Use PermitPal to get instant access to the complete regulations.
Data last verified: February 19, 2026
Sign Regulation Overview for Mercer Island, Washington
Sample Sign Requirements in Mercer Island
| Sign Type | Max Height | Max Area | Setback |
|---|---|---|---|
| Wall Sign | — | 12 square feet (non-single-family dwelling uses); 72 square inches (licensed practitioners or service operators) | — |
| Freestanding Ground Sign | 42 inches | 18 square feet (non-single-family dwelling uses) | Minimum 10 ft from public right-of-way; 35 ft from abutting properties (applies primarily to public schools). |
| Electronic Readerboard (Option for Public Schools) | 42 inches (if ground sign) | 12 square feet (if wall sign) or 18 square feet (if ground sign, cannot exceed as per general rule) | Same as freestanding sign if on a ground sign: 10 ft from ROW, 35 ft from abutting prop. |
* Sample data shown. Actual requirements may vary by zone. Use PermitPal for complete, location-specific regulations.
Sign Types Covered
13
- Wall Sign
- Freestanding Ground Sign
- Electronic Readerboard (Option for Public Schools)
- Projecting Sign
- +2 more types
Zoning Districts
6
Different zoning districts with specific sign regulations
Data Includes
- Permit requirements
- Height restrictions
- Illumination rules
Official Resources for Mercer Island
Other Cities in Washington
Frequently Asked Questions
In Mercer Island, monument signs are limited to 42 inches. Height limits vary by zoning district and sign type. Use PermitPal to get exact requirements for your specific location.
To get a sign permit in Mercer Island, submit an application to the local building or planning department with sign dimensions, location, and design specifications. Our data confirms permits are required for most commercial signs. Processing typically takes 1-4 weeks. PermitPal helps you identify specific requirements and prepare complete applications.
In Mercer Island, regulated sign types include Wall Sign, Freestanding Ground Sign, Electronic Readerboard (Option for Public Schools), Projecting Sign, and 2 more types. Most commercial signs require permits. Temporary signs and certain small signs may be exempt. Use PermitPal for specific exemptions.
In Mercer Island, monument signs typically require a Minimum 10 ft from public right-of-way; 35 ft from abutting properties (applies primarily to public schools). setback from property lines. Setbacks may increase near residential zones or intersections. Wall signs attached to buildings generally don't have setback requirements. Use PermitPal for location-specific setback data.
Digital and LED signs in Mercer Island are regulated with specific requirements for brightness, animation, and message duration. Mercer Island has documented illumination rules in our database. Use PermitPal to see the exact requirements for electronic message centers.
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