Heritage & Protected Trees: Arlington Heights vs Oak Lawn
How do heritage & protected trees rules compare between Arlington Heights, IL and Oak Lawn, IL?
Oak Lawn has fewer restrictions than Arlington Heights.
Arlington Heights, IL
Cook County
Cook County Chapter 126 protects significant trees on unimproved and partially improved land. Deciduous trees over 6 inches in diameter and evergreens over 10 feet tall are protected. Heavy fines apply for unauthorized removal.
View full Arlington Heights rules →Oak Lawn, IL
Cook County
Oak Lawn does not maintain a formal heritage or landmark tree registry. Tree preservation is handled primarily through parkway ownership, subdivision conditions, and general good-neighbor standards.
View full Oak Lawn rules →Key Facts Comparison
| Fact | Arlington Heights | Oak Lawn |
|---|---|---|
| Protected Deciduous | 6+ in. diameter | - |
| Protected Evergreen | 10+ ft tall | - |
| Code | Chapter 126 | - |
| Penalty | Heavy fines + replacement | - |
| Heritage Registry | - | None |
| Parkway Ownership | - | Primary protection |
| Development Conditions | - | May require preservation |
| Park District | - | Manages notable park trees |
Highlighted rows indicate differences between cities.
Arlington Heights FAQ
What trees are protected in Cook County?
On unimproved/partially improved land: deciduous trees over 6 inches in diameter and evergreens over 10 feet tall are protected under Chapter 126.
What happens if I remove a protected tree without permission?
Heavy fines are imposed and replacement tree planting may be required. Each tree removed without a permit may be a separate violation.
Oak Lawn FAQ
Is my 100-year-old oak protected?
Not automatically. Oak Lawn does not have a heritage-tree registry for private property. Protection only applies if the tree is on Village parkway or subject to a development condition.
Can I voluntarily protect a special tree?
Yes, through private conservation easements or deed restrictions. Work with an attorney and, for professional tree care, an ISA-certified arborist.
Who handles trees in Oak Lawn parks?
The Oak Lawn Park District manages trees within its parks and can advise on notable specimens and commemorative plantings.
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