A 19-inch tree can change the project.
On one- and two-unit residential property in Austin, trees 19 inches or larger in diameter are regulated. Removal or certain impacts can require Tree Ordinance Review. Heritage protections can apply at 24 inches for listed species.
The quick rule
All species are protected at this size on residential property.
Applies to listed species, including all oaks and pecans.
Austin measures diameter at about 4.5 feet above grade. A regulated-tree issue is not limited to full removal: the City says pruning 25% or more of canopy or disturbing the critical root zone can also trigger review.
How to measure before calling anyone
Measure the trunk circumference 4.5 feet above ground and divide by 3.14 to estimate diameter. Multi-stemmed or irregular trees use special measurement rules, so use the City Arborist instructions when the result is near a threshold.
If a contractor proposes removal of a large tree, confirm whether a TORA is required before authorizing work.
What if the tree is dead or dangerous?
A dead, diseased, or imminent-hazard condition does not automatically erase regulation. The City publishes a specific review process for regulated trees that are dead, diseased, or hazardous.
What to ask a tree company
- Will you identify whether the tree is protected or heritage?
- Who handles any TORA submission?
- Is an ISA Certified Arborist involved in the assessment?
- Does the written scope distinguish trimming from removal and include haul-away?
Check this against your own home.
Austin Home Intelligence combines the public context with your property details and answers before recommending whether professional service is worth considering.
Run the Tree Risk Check →Sources and primary references
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