Cook County Chapter 126 (Tree Preservation, Landscaping and Screening) governs tree protection during development. Developers must submit tree surveys. Construction root zone protections apply. The ordinance covers landscaping and screening requirements.
Cook County's Tree Preservation, Landscaping and Screening Ordinance (Chapter 126) provides comprehensive tree protection, landscaping, and screening requirements for unincorporated areas. Development projects must submit tree surveys identifying existing trees on the site. Construction activities must protect tree root zones from damage by heavy equipment, grade changes, and material storage. The ordinance requires landscaping and screening for new developments to buffer residential areas from commercial/industrial uses and parking lots. Street tree maintenance responsibilities may apply to adjacent property owners. The Cook County Forest Preserve District manages tree care on preserve property. The Morton Arboretum provides tree protection guidance that aligns with Cook County's ordinance goals.
Construction damage to protected trees: $100–$1,000 fine. Failure to submit tree survey: permit delay. Landscaping non-compliance: zoning violation.
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