Outdoor Lighting in Iowa City, IA (2026)
3 verified outdoor lighting rules for Iowa City, Iowa, sourced directly from the municipal code and official government pages.
Verified from official government sources
Dark Sky Rules
Iowa City requires most outdoor bulbs over 2,000 lumens to be fully shielded, bans floodlighting for parking and display areas, and outlaws laser lights, searchlights, and mercury vapor bulbs outright. Fixtures near homes also face strict height and glare limits.
Iowa City Outdoor Lighting Shielding Rules
Some RestrictionsIowa City Code § 14-5G-4B(1)-(2), C(1)
1. All bulbs that exceed two thousand (2000) lumens must be fully shielded as installed. 2. ... Unshielded or partially shielded bulbs that are two thousand (2000) lumens or less must be frosted glass or be installed behind a translucent cover. ... 1. ... Except for lighting of loading areas, service areas, and for architectural emphasis, floodlighting is prohibited. Floodlights are not permitt...
Light Trespass & Shielding
Iowa City caps how much light can cross a property line under zoning code section 14-5G-4C: no more than 0.5 initial horizontal foot-candle and 2.0 initial maximum foot-candles at any point on a boundary next to a residential, CN-1 or CO-1 zone, with floodlighting banned outright except for loading, service or architectural-emphasis lighting.
Iowa City Outdoor Light Trespass Limits
Some RestrictionsIowa City Code § 14-5G-4C
C. Light Trespass: ... The trespass standards are intended to prevent light from one property extending beyond the property line onto adjacent properties. Compliance with this subsection is achieved with fixture shielding, directional control designed into the fixture, fixture location, fixture height, fixture aim, or a combination of these methods. 1. Except for lighting of loading areas, serv...
Billboard Lighting
Iowa City's zoning code flatly bans illumination on billboards and other off-premises signs. Under Table 5B-6 of the sign ordinance, billboards get no permit requirement but zero light: no internal, external, or backlighting of any kind is allowed on these structures.
Iowa City Billboard Illumination Ban
Heavy RestrictionsIowa City Code § 14-5B-9, Table 5B-6
14-5B-9: OFF PREMISES AND TEMPORARY SIGNS: A. ... In addition to the signage permitted in each zone, as described in section 14-5B-8 of this article, the following signs may be installed in any zone according to the specifications and provisions contained in table 5B-6 of this section... ... Table 5B-6: ... Sign Specifications And Provisions For Off Premises And Temporary Signs... ... Billboard...
Looking for Johnson County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Iowa City city rules.
Outdoor Lighting in Johnson County →