Boulder requires permits to remove trees above a certain size on private property. Protected species and street trees have additional restrictions.
Boulder tree protection ordinance requires a permit to remove trees exceeding a specified trunk diameter, typically 6 to 12 inches measured at 4.5 feet above grade (DBH). Applications require an arborist assessment for larger trees. Street trees and right-of-way trees are managed by Boulder public works and cannot be removed by residents. Dead, diseased, or hazardous trees may qualify for expedited permits. Unauthorized removal of protected trees results in significant fines and replacement requirements.
Unauthorized removal: $500 to $10,000 per tree depending on size and species. Replacement planting required at 2:1 or 3:1 ratio.
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