Baltimore County, MD Sign Regulations: Window Signs (2026)
Key Facts
- Max area per sign
- 3 square feet
- Max count
- 3 per front-facade window/door
- Permit
- Use permit required
- Mounting
- Interior only, front facade only
- Eligible zones
- B.L., B.M., B.R., C.B., B.L.R., M.L., M.L.R., M.H., M.R.
Summary
Baltimore County caps an interior enterprise window sign at 3 square feet and no more than three per front-facade window or door under the Table of Sign Regulations and BCZR § 450.5.B.10. The sign must be mounted on the interior of the structure; a sign attached to the outside of the glass is treated as a wall sign instead.
10.Enterprise window sign: An enterprise sign mounted on the interior of an enclosed structure that is visible from the exterior of the structure. A sign applied or attached to the exterior of a window is considered to be a wall-mounted sign as covered by Section 450.5.B.9. ... Enterprise window sign — Any enterprise sign mounted on the interior of an enclosed structure that is visible from the exterior. | Interior wall-mounted; interior window-mounted | B.L., B.M., B.R., C.B., B.L.R., M.L., M.L.R., M.H., M.R., excluding multi-tenant office, retail or industrial building | Use | 3 square feet | 3 when mounted on the interior of any front facade window or door | Yes | See Sections 450.6.A.4 and 450.7.B | Interior application only, Not permitted to be mounted on any window or door that is not a front facade.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 29 | Zoning Regulations: Supplement 10).
Full Breakdown
9 instead, with that section's own rules on projection and placement near the roofline. The Table of Sign Regulations sets the numeric limits for the interior version: a maximum of 3 square feet of area, up to three signs when mounted on the interior of any front facade window or door, and a use permit is required before installation. The table's additional-limitations column restricts these signs to interior application only, and specifically bars mounting one on any window or door that is not on the front facade, so a side or rear window sign of this class is not permitted at all.
zones, and are unavailable to a multi-tenant office, retail or industrial building, which must rely on other classes of signage instead. B for any electronic version. 12, so a seasonal paper sign taped to the inside of the glass does not need a permit at all.
Violations & Fines
Mounting more than three enterprise window signs on a front-facade window or door, exceeding the 3-square-foot area cap, or placing one on a side or rear window rather than the front facade is a zoning violation enforceable by the Department of Permits, Approvals and Inspections under § 450.8. An enterprise window sign installed without the required use permit is treated as an illegal sign under § 450.8.C.1.b and must be removed or brought into compliance through the code's abatement process.
Frequently Asked Questions
How big can a window sign be inside my Baltimore County storefront?
Can I put an enterprise sign on the outside of my window?
Do I need a permit for a temporary paper sign in my window?
Sources & Official References
Other rules in Baltimore County
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