Protected Tree Species: Arlington Heights vs Chicago

Do I need a permit to remove a dead oak in unincorporated Cook?

Yes, even dead protected trees require a tree removal permit under Ordinance 19-3158, though dead-tree removals are typically issued without mitigation if a certified arborist confirms the tree is dead, dying, or hazardous to structures.

What counts as a heritage tree?

The ordinance treats native oaks and hickories of any size, plus any tree 20 inches DBH or greater regardless of species, as protected. Some forest preserve designations add specific named heritage trees with even tighter removal rules.

Does this apply if my house is in a suburban village?

No. Ordinance 19-3158 applies only to unincorporated Cook County. Villages such as Schaumburg, Oak Park, and Evanston run their own tree ordinances with different protected species lists, removal thresholds, and replacement rules.

Can I trim the parkway tree in front of my Chicago house?

No. Only the Bureau of Forestry may prune or remove parkway trees. Call 311 for service requests; unauthorized work risks fines of $300 to $1,500 plus the appraised tree value.

Does Chicago regulate cutting down a private backyard tree?

Generally no, unless the tree is part of a zoning-approved landscape plan or sits on land subject to a planned development. Private homeowners can usually remove their own trees without a permit.