Cook County, IL Environmental Rules: Defensible Space (2026)
Mandated vegetation clearance zones around homes in fire hazard zones, including the 100-ft Zone 0/1/2 model used by California and other wildfire-prone states.
Research in progress
We are currently verifying Cook County's specific local ordinance for defensible space. In the meantime,Illinois state law generally applies, and below you'll find guidance for finding the official rules and links to related Cook County ordinances we've already verified.
Illinois State Law Context
Illinois state law provides the baseline framework for defensible space across all municipalities in the state. Individual cities like Cook County may adopt additional local rules on top of state requirements, which is what makes checking your specific city ordinance important. For Cook County residents, the safest approach is to follow state law as a baseline and contact City Hall for any additional local requirements.
You can browse all Illinois environmental rules to see how cities across the state regulate this topic.
How to find official Cook County Defensible Space rules
- Search for "Cook County IL municipal code" to find your city's online code portal (Municode, eCode360, or American Legal Publishing are the most common).
- Look for chapters covering environmental rules, zoning, nuisance, or property maintenance — that's where most defensible space rules live.
- Contact Cook County City Hall's code enforcement, planning, or community development department for clarification.
- Check with your HOA if applicable — many HOAs have stricter rules than the city itself.
Other environmental rules verified for Cook County
We've verified the following environmental rules for Cook County: