Kirkwood, MO Sign Regulations: Window Signs (2026)

Kirkwood Code of Ordinances § 5-15(a)(1)(viii), within the Permanent Signs article of the Sign Code, sets the window-sign rule directly: coverage cannot exceed 33% of any single window area, with the window area defined to include multiple panes separated only by framing but not by architectural elements, and the coverage calculation applies to the full window size regardless of whether an awning covers it. Permanent window signs must be painted, metal-leafed, or otherwise applied to either side of the glass on an exterior door or window, and the code extends the definition to interior displays too: a structure that would count as a sign if mounted outside the building is still treated as a window sign if it is mounted inside but oriented so a person outside the window can read it.

The article's separate definitions section, at the sign-terms list preceding Article III, defines 'SIGN, WINDOW' the same way, adding that a glass brick wall counts as a window for these purposes. Subsection (d) then flatly forbids illumination of window signs, one of the few sign types in the article barred from any lighting at all, whether internal, external or backlit. Because window signs sit inside the building envelope, § 5-9(c)(1) confirms they fall outside most permit requirements only when placed completely out of exterior view; once visible from outside, the 33% cap and no-illumination rule apply regardless of permit status.