Glendale Tree Trimming Rules (2026): What You Need to Know

Glendale Municipal Code Chapter 12.44 establishes protections for indigenous trees throughout the city. Any person proposing work to or near any protected indigenous tree must apply for and obtain a permit from the Director prior to the proposed work, including encroachment or development/construction projects. No permit is required for routine pruning of live wood if the pruning cut is less than 2 inches in diameter. However, topping, hat-racking, or lion's tail pruning of an indigenous tree is strictly prohibited.

Pruning of more than one quarter (25%) of a tree's total live foliage is prohibited without a permit. All pruning must be performed in accordance with arboriculture industry standards. Trimming of a protected indigenous tree to meet minimum clearance requirements for fire and life safety, as set forth in a notice to abate fire hazard from the Fire Department, is exempt from the permit requirement. Any tree trimming service, arborist, or tree expert violating the indigenous tree provisions is guilty of a crime that may be charged as either an infraction or misdemeanor, with each protected tree damaged or destroyed constituting a separate violation.

Chapter 12.40 governs city-owned trees. Any pruning, removal, planting, or work in proximity to city-owned trees requires proper permitting and authorization from the Director of Public Works. City trees are typically pruned every six years following industry standards that prohibit excessive removal of live leaf area. Residents should not trim or remove city-owned trees without authorization. Contact Public Works Maintenance Services at (818) 548-3950 for questions about tree permits and regulations.