Sign Regulations in Detroit, MI (2026)
5 verified sign regulations for Detroit, Michigan, sourced directly from the municipal code and official government pages.
Verified from official government sources
Political Signs
Detroit lets residential properties post portable temporary signs, including campaign signs, only from 30 days before a City primary through seven days after the following general election, capped in size.
Detroit Political Sign Timing Rules
Some RestrictionsDetroit City Code § 4-4-183(a)(3)
(3)Portable temporary signs. For any premises located in a low-density residential sign district or high-density residential/mixed use sign district that is currently occupied, whether wholly or partially, for residential purposes, portable temporary signs, in any number but not exceeding six square feet in area for any single sign or 18 square feet in aggregate area for all signs, are permissi...
Garage Sale Signs
Detroit regulates a garage-sale sign as a temporary sign under the sign code: one per property, a permit, a size cap as low as six square feet in residential districts, and removal within 24 hours after the sale ends.
Detroit Garage Sale Sign Rules
Some RestrictionsDetroit City Code § 4-4-182
(a) Not more than one temporary sign may be permitted on any one premises at any one time, except that, for a multi-tenant building or structure, one, but not more than one, temporary sign may be permitted for any one ground floor tenant at any one time. ... (d) Any temporary sign may be permitted only until the conclusion of the occasion to which it is intended to direct attention, upon which ...
Digital Billboards
Detroit bars dynamic (digital) advertising signs, billboards, in the Central Business District except inside the designated Entertainment District, while dynamic billboards elsewhere in the city need a Traffic Engineering Division permit finding and must clear stricter spacing than static signs.
Detroit Digital Billboard Rules
Significant RestrictionsDetroit City Code § 4-4-128(b)(7)
(7)Dynamic operation. No local advertising sign may be dynamic, with the exception of advertising signs located in the Entertainment District, which may be dynamic in accordance with the standards set forth in Division 3, Subdivision B, of this article.
Window Signs
Detroit caps window signs at 25% of the window's area in most districts, rising to 50% for vinyl mesh signs, with an 80-square-foot cap per building.
Detroit Window Sign Coverage Limits
Some RestrictionsDetroit City Code § 4-4-46
(c)Area.(1)In any low-density residential sign district or recreation/open space sign district, the area of any window sign must not exceed 25 percent of the area of the window in which the sign is affixed.(2)In any high-density residential/mixed use sign district, low-density commercial/institutional sign district or high-density commercial/industrial sign district, the area of any window sign...
Freeway-Facing Signs
Detroit bans placing or carrying any advertising sign, material, or commercial message on a freeway overpass where it would face oncoming freeway traffic, enforced as a misdemeanor by the Police Department.
Detroit Freeway Overpass Advertising Sign Ban
Heavy RestrictionsDetroit City Code § 4-1-5
It shall be unlawful for any person to carry or place on any freeway overpass any advertising sign, advertising material, or other commercial message that would be oriented toward and visible to the occupants of vehicles on such freeway.
Looking for Wayne County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Detroit city rules.
Sign Regulations in Wayne County →