Orange County's tree ordinance provides heightened protections for Heritage Trees — mature native trees of significant size, age, or ecological value. Heritage tree removal requires a 5:1 replacement ratio by size and may cost $21,200 or more in mitigation fees.
Within unincorporated Orange County, Heritage Trees receive the highest level of protection under the Protected Tree Ordinance. Heritage Tree designation applies to older, mature native trees that meet specific size and species criteria — primarily large native oaks such as Heritage Live Oaks. Heritage Trees require replacement at five times the size of the original tree when removal is permitted, compared to the standard three-times replacement ratio for Specimen Trees. The mitigation cost for removing a Heritage Live Oak begins at $21,200, reflecting the ecological and community value of these mature specimens. Developers proposing projects that would affect Heritage Trees must preserve them on-site wherever feasible. When preservation is not possible, the applicant must replant more trees than removed or contribute increased mitigation fees to the county's urban canopy program. The county-certified arborist conducts on-site assessments to determine Heritage Tree status and evaluate alternatives to removal.
Unauthorized Heritage Tree removal carries the highest penalties under the ordinance. Replacement at 5:1 size ratio is mandatory. Mitigation fees start at $21,200 per Heritage Live Oak. Criminal prosecution may apply for willful destruction.
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