Outdoor Lighting in Walla Walla County, WA (2026)
2 rules for unincorporated Walla Walla County, Washington.
Verified from official government sources
Light Trespass & Shielding
Industrial and commercial development in unincorporated Walla Walla County cannot let its lighting spill onto neighbors or public roads. Walla Walla County Code Section 17.16.014(D)(2)(b) requires that industrial and exterior lighting not produce glare on public highways and neighboring property, one of the development conditions attached to every industrial and manufacturing use permitted under the county's zoning table.
Walla Walla County Industrial Lighting Glare Rule
Some RestrictionsWalla Walla County Code § 17.16.014(D)(2)(b)
b.Industrial and exterior lighting shall not produce glare on public highways and neighboring property. Arc welding, acetylene torch cutting or similar processes shall be screened from any point outside of the property.
Billboard Lighting
Unincorporated Walla Walla County's sign chapter, WWCC § 17.28.010.A, requires the light from any illuminated sign, billboards included, to be shaded, shielded or directed so its brightness is not a nuisance, and externally lit signs must face away from residences and streets. Billboards themselves are confined to industrial, primary agriculture and agriculture residential zones.
Illuminated Sign Lighting Rule, Walla Walla County
Some RestrictionsWalla Walla County Code § 17.28.010.A
A.The light from any illuminated sign shall be so shaded, shielded or directed that the light intensity or brightness will not be a nuisance to surrounding areas. Any externally illuminated sign shall be oriented away from the surrounding residences, and away from streets.
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