ENVIRONMENTAL REVIEW OAK TREE ORDINANCE
Under the Los Angeles County Ordinance, a person shall not cut, destroy, remove, relocate, inflict damage, or encroach into the protected zone of any tree of the oak tree genus, which is 8" or more in diameter four and one-half feet above mean natural grade or in the case of oaks with multiple trunks combined diameter of twelve inches or more of the two largest trunks, without first obtaining a permit.
Many kinds of oak trees are native to Los Angeles County. All oak species are covered by the oak tree ordinance. Older oak trees that have thrived under natural rainfall patterns of dry summers and wet winters often cannot tolerate the extra water of a garden setting. These trees must be treated with special care if they are to survive. Oaks that have been planted into the landscape or have sprouted as volunteers tend to be more tolerant of watered landscapes. While these vigorous young trees may grow 1 1/2 to 4 feet a year in height under the best conditions, they are not as long-lived as indigenous oaks.
OTHER COMMON OAKS:
Large evergreen tree with a broad round shape and large limbs growing 30'-70' high and 35'-80' wide. Leaves are deep glossy green, 1"-3" long, spiny and holly-like with distinctly cupped or curled leaf edges. This is the most common oak seen around southern California’s foothill communities.
Quercus Engelmannii Mesa Oak
Mesa oaks are indigenous to the foothills of the Sierra Madres. They grow 40 to 50 feet high with semi-evergreen, dense, wide-spreading canopy. Leaves are thick, deep blue-green in color; varying form and size.
Quercus Lobata Valley Oak
Large deciduous tree 60'-75' high, broadly spreading 50'-80' wide. Leaves are deep green 3"-4" long,