Washington County, UT Sign Regulations: Window Signs (2026)

Washington County treats illuminated window signs as part of its outdoor lighting ordinance rather than the general sign chapter: § 10-15C-11 opens by declaring that in all zones and areas of the county, sign lighting must be designed, directed and shielded so the light source itself is never visible beyond the property line, and every illuminated sign must follow the countywide lighting-hours schedule. Subsection D speaks directly to window signs: a business may display no more than two illuminated window signs, each capped at four square feet, and none may stay lit once the business has closed for the day.

The same section separately regulates how any illuminated sign may be lit: externally lit signs are capped at four fixtures per sign face and 40,000 lumens each (§ 10-15C-11(A)), internally lit signs must use translucent, diffusing material for text and logos rather than clear panels (§ 10-15C-11(B)), and backlit signs may show only an indirect halo glow with the light source itself hidden from view (§ 10-15C-11(C)). Because this standard sits in Chapter 15C rather than Chapter 19, the building inspector still enforces it under the sign-permit process in § 10-19-2: no sign may be erected, enlarged or altered without a permit, and an illuminated window sign exceeding the two-sign or four-square-foot limit is treated as an illegal sign subject to the abatement process. All sign lighting, including window signs, also counts toward the property's total outdoor light-output cap.