Oak trees ≥36 inches in diameter qualify as Heritage Oaks under LA County Code Chapter 22.174 and receive heightened review. Removal is rarely approved.
Within Chapter 22.174, oaks of 36 inches diameter or greater are considered Heritage Oaks. Applications for removal or significant impact require additional findings by the Director and may trigger Planning Commission review. Replacement ratios are higher (often 4:1 or greater) and an in-lieu fee may apply if on-site replacement is infeasible. The Altadena CSD encourages preservation of mature trees (Section 22.306.060.D.2 for designated historic properties).
Unpermitted Heritage Oak removal triggers enhanced penalties under 22.174.080 — fines and replacement value can exceed $10,000 per tree based on appraised value.
Altadena, CA
LA County allows backyard chickens in R-1 zones in unincorporated areas (including Altadena) subject to coop setbacks under LA County Code Title 10 and Title...
Altadena, CA
LA County Code Section 10.32.010 prohibits dogs running at large in any public place or private property other than the owner's, unless restrained by a chain...
Altadena, CA
Trimming protected oak trees (≥8 in DBH) requires an Oak Tree Permit if the work enters the protected zone or removes >25% of crown. Street trees in the publ...
Altadena, CA
In Altadena's Very High Fire Hazard Severity Zones, grass and weeds must be kept under 3 inches under LA County Fire Code Title 32 defensible-space rules.
Altadena, CA
LA County Fire's Brush Clearance program also functions as the weed-abatement ordinance — vacant and improved lots must keep weeds and grasses cut to under 3...
Altadena, CA
Outdoor watering in Altadena (served by Lincoln Avenue Water Co., Las Flores Water Co., Rubio Cañon, and Kinneloa Irrigation District) is limited to 2 days p...
Side-by-side rule comparisons with other cities in Los Angeles County.
See how other cities in Los Angeles County handle heritage & protected trees.
See how Altadena's heritage & protected trees rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.