Cook County Tree Trimming Rules (2026) — What You Need to Know

Some Restrictions

County ordinances apply to unincorporated areas of Cook County. Cities within the county may have their own rules that supersede county-level regulations.

Key Facts

Sidewalk Clearance: Typically 8 feet above sidewalks
Street Clearance: Typically 14 feet above roadways
Protected Species: Some trees may require a permit to trim or remove
Dead Tree Removal: Owner responsible for hazardous dead trees

The Short Version

Tree trimming regulations in Cook County may require property owners to maintain trees so that branches do not obstruct sidewalks, streets, or sight lines. Protected tree species may require a permit before any pruning or removal work. For the most current regulations, check with your local Cook County government office.

Full Breakdown

Tree trimming regulations in Cook County require property owners to maintain trees on their property so they do not create hazards or obstructions. Branches overhanging public sidewalks must typically be trimmed to at least 8 feet of clearance, while branches over roadways must be maintained at 14 feet of clearance. Property owners are responsible for the condition of trees on their lot, including dead or diseased trees that could fall and cause damage. Some counties have protected tree ordinances that require a permit before removing trees above a certain size (commonly 6 inches or more in trunk diameter). Heritage or landmark trees may have additional protections. When trimming or removing trees near power lines, the local utility company should be contacted rather than attempting the work independently.

What Happens If You Violate This?

Failure to maintain trees in Cook County may result in a notice of violation with a 14–30 day compliance period. If overhanging branches are not trimmed, the county may trim them at the owner's expense. Removing a protected tree without a permit may result in fines of $500 to $10,000 or more depending on the tree's size and species, plus a potential requirement to plant replacement trees. If a poorly maintained tree causes damage, the property owner may be held liable.

Frequently Asked Questions

Do I need a permit to remove a tree on my property in Cook County?

You may need a permit to remove trees above a certain size, particularly species designated as protected or heritage trees. Dead, hazardous, or invasive species may be exempt. Check with the county planning or forestry department.

Who is responsible for tree branches that hang over my property from a neighbor's tree?

You generally have the right to trim branches that overhang your property, up to the property line. However, you may not enter the neighbor's property, and you should not damage the health of the tree. Some counties require you to notify the neighbor first.

What about trees near power lines?

Do not attempt to trim trees near power lines yourself. Contact your local utility company, which typically handles tree trimming within a certain distance of power lines at no charge.

How does Cook County compare?

See how Cook County's tree trimming rules stack up against other locations.

Compare to Another Location View Georgia Overview