Do I Need a Tree Permit in Palo Alto?
Palo Alto has one of the most protective tree ordinances in the Bay Area. Here's exactly what's protected, what you need, and what happens if you skip it — from an ISA Certified Arborist who works in this city regularly.
Does my tree need a permit?
Select your tree species and trunk diameter to get an instant answer based on Palo Alto's 2026 ordinance.
DBH = diameter measured at 4.5 feet above natural grade. Wrap a tape measure around the trunk and divide by 3.14.
What trees are protected in Palo Alto?
Palo Alto's ordinance (Municipal Code Chapter 8.10) protects trees by species and size. The thresholds below are measured at DBH — diameter at breast height, 4.5 feet above natural grade.
| Species | Protected at | Notes | Penalty |
|---|---|---|---|
| Coast Live Oak, Valley Oak | ≥11.5″ DBH | Most common protection trigger in PA | $7,500–$10,000+ |
| Maple, Cedar, Bay Laurel | ≥11.5″ DBH | Same threshold as oaks | Appraised value + replacement |
| Coast Redwood | ≥18″ DBH | Heritage review often triggered | Appraised value + replacement |
| All other non-invasive species | ≥15″ DBH | Invasive species exempt (e.g. acacia, eucalyptus) | Appraised value + replacement |
| Street trees | Any size | City-owned, city approval required for any work | Replacement + appraised value |
| Heritage-designated trees | Any size | Additional Urban Forestry + public review | Development moratorium possible |
Not sure of the species or size?
When in doubt, measure first. An arborist consultation ($150–$300) before you remove anything is far cheaper than the penalty after. If it turns out the tree isn't protected, you've lost an afternoon and a small fee. If it is protected and you didn't check, you're looking at $10,000 minimum.
How to get a tree removal permit in Palo Alto
Palo Alto's permit process runs through the Urban Forestry division of Public Works. Here's the actual sequence:
Measure and confirm species
Wrap a flexible tape around the trunk at 4.5 feet above natural grade. Divide circumference by 3.14 to get diameter. Confirm whether your species is an oak, redwood, or other. If you're unsure of species, a certified arborist can identify it in one visit.
Get an arborist report
Palo Alto requires a report from a city-designated arborist — not every ISA-certified arborist qualifies. The report must document condition, reason for removal, and why corrective treatments won't work. Budget $300–$600 for this report.
Your tree service company often handles this as part of the job — confirm before hiring.
Submit online via OPS portal
Palo Alto uses an online portal (OPS) for permit applications. You'll upload the arborist report, a site plan showing the tree's location, and pay the approximately $507 fee at submission. Application naming convention: "C1[address]ARBORIST.pdf".
City site inspection
A staff arborist from Urban Forestry will visit the property to verify the arborist report findings. For heritage trees or trees near development projects, this may trigger a public notification period and a hearing before the Development Review Board.
Heritage tree removals can take 8–12+ weeks. Plan accordingly if you're on a construction timeline.
Receive permit and schedule work
Standard permits take 4–8 weeks from submission. Once approved, the permit is valid for 180 days. The permit document must be on-site during the removal. Replacement planting is required per the permit conditions — usually 1:1 on-site.
What happens if you remove a tree without a permit?
Minimum $7,500 per tree — plus a possible development freeze
Unauthorized removal of a protected tree in Palo Alto triggers penalties of $7,500–$10,000 or more per tree, plus mandatory replacement planting at your expense. For heritage trees, the city can also impose a development moratorium of up to 24–36 months on the property — meaning you can't pull building permits for anything until the violation is resolved. The Urban Forestry division actively enforces violations and investigates reports from neighbors.
The math is simple: a permit costs approximately $507 and 4–8 weeks of lead time. A violation costs $10,000+ and potentially years of development delays. There is no scenario where skipping the permit makes financial sense.
Palo Alto Urban Forestry — contact and resources
Call before you apply
Urban Forestry staff are helpful and will often tell you on the phone whether your tree is likely to qualify for removal before you pay the arborist report fee. Worth a 10-minute call at (650) 329-2421.
Frequently asked questions
Does pruning require a permit in Palo Alto?
Pruning that removes up to 25% of the canopy and follows ISA pruning standards does not require a permit. However, work within 10 feet of a public tree requires Public Works approval. When in doubt, call Urban Forestry.
What if the tree is dead or hazardous?
Dead or imminent-hazard trees can be removed faster, but you still need permit approval unless an emergency is declared by a city official or building inspector. Document the hazard with photos before any emergency removal and report within 10 days.
My neighbor's tree is hanging over my property — do I need a permit to trim it?
You can trim branches up to your property line without a permit (California law). However, if trimming would remove more than 25% of the canopy or damage the tree, you could face liability. A certified arborist review before any significant trimming is strongly recommended.
What counts as a street tree?
Any tree in the public right-of-way — the strip between the sidewalk and street — is a city street tree, regardless of which property it's adjacent to. All street tree work requires city approval. When in doubt, assume it's a street tree.
Related reading for Palo Alto tree owners
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