St. Tammany Parish, LA Sign Regulations: Window Signs (2026)

The parish's sign chapter, Sec. 600-4 of the Unified Development Code, treats temporary window signs as an exempt sign type under Sec. 600-4.2(B)(1), meaning no sign permit application is required before posting one. Two conditions apply: the sign's materials must be of a kind that signals its temporary nature (paper, vinyl cling, cardboard and similar stock, as opposed to permanent lettering or illuminated panels), and the aggregate area of all window signs on the glass they are posted on cannot exceed 25 percent of that window's area. The cap applies per window, so a shop with several street-facing panes has to keep the combined signage on each pane under the quarter mark rather than averaging across the storefront.

Window signs sit alongside two other exempt-sign categories in the same subsection: freestanding temporary signs, capped at 32 square feet and 60 days on site, one per development or one per street frontage on a multi-frontage lot, and signs affixed to an active construction site. None of these exemptions waive the parish's separate list of outright Prohibited Signs in Sec. 600-4.3(I), which bars flashing, revolving, portable/trailer and roof signs regardless of permit status, so an electronic or animated display in a window does not qualify for the temporary-window exemption even if it stays under 25 percent of the glass.

Enforcement of the whole sign chapter runs through the Department of Planning and Development under Sec. 600-4.2(A), which handles violations and nuisance sign cases through the parish's Chapter 2 code-violation and administrative-adjudication process rather than criminal court.