Do I Need a Tree Permit in Atherton?
Atherton's ordinance is unique on the Peninsula: it's actually builder-friendly for non-oaks in the buildable area — but native oaks are protected at any size, anywhere on the property. Here's exactly how to know which category your tree falls into.
Does my tree need a permit?
Answer two questions to get an instant result based on Atherton's Chapter 8.10 ordinance.
Circumference = wrap a tape around the trunk at 54 inches above natural grade. 48 inches circumference ≈ 15 inches diameter.
What trees are protected in Atherton?
Atherton's Chapter 8.10 uses a two-part system that is different from most Peninsula cities. Species and location both matter.
| Tree type | Location | Protected at | Penalty |
|---|---|---|---|
| Native oaks (all species) | Anywhere on property | Any size — no minimum | 50% appraised value + 2:1 replacement |
| All other species | Setback areas | ≥48″ circumference (approximately 15″ DBH) | 50% appraised value + 2:1 replacement |
| All other species | Main buildable area | Generally not protected | N/A (permit not required) |
| Heritage-designated trees | Anywhere | Any size, individually designated | Planning Commission approval required |
| Coast redwood | Setback areas | ≥48″ circumference | 50% appraised value + 2:1 replacement |
What counts as a "setback area"?
Setbacks are the required distances from property lines where you cannot build — typically front, rear, and side yards. The exact setback dimensions depend on your lot and zoning. If a tree is outside the footprint where a structure could be built, it's in a setback. If you're not sure, the Town Planning Department can confirm: (650) 752-0500.
The Planning Commission requirement — what it means for your timeline
This is the single biggest difference between Atherton and every other Peninsula city. Most cities process tree permits administratively — staff reviews and approves within a few weeks. Atherton requires a Planning Commission public hearing. That means:
- Your application must be submitted in advance of a scheduled hearing date
- Neighboring property owners will be formally notified
- Neighbors may appear and comment at the hearing
- The Commission votes — approval is not guaranteed
- The whole process takes 6–10 weeks minimum, longer if complications arise
If you are buying or selling a property in Atherton and a tree removal is part of your plan, build the permit timeline into your transaction schedule. Assuming a quick administrative approval is one of the most common and costly mistakes I see on Atherton estate transactions.
How to get a tree removal permit in Atherton
Determine species and location
Is it a native oak? If yes, a permit is required regardless of size or location. If it's another species, determine whether it's in a setback area and measure the circumference at 54 inches above natural grade. If the circumference is 48 inches or more, it's protected.
Not sure? Call Town Arborist Sally Bentz at (650) 752-0526 before scheduling any work.
Hire a C-61/D-49 licensed arborist for a removal report
Atherton Municipal Code Section 8.10.060 explicitly requires a valid California C-61/D-49 tree care license for any tree work. This is more strictly enforced than neighboring cities. Verify CSLB license at cslb.ca.gov. The arborist report must document species, size, condition, and justification for removal — whether dead, hazardous, diseased, or causing structural damage.
Submit application with $750 fee
File a heritage tree removal application with Atherton Planning Department. Include the arborist report, site photos, and proposed 2:1 replacement planting plan. Staff will confirm the next available Planning Commission hearing date — this determines your actual timeline.
Attend the Planning Commission public hearing
You or your arborist should attend the hearing to present the case for removal. Neighboring property owners will be notified and may comment. The Commission reviews the arborist report and site conditions and votes. A strong, well-documented arborist report significantly improves approval odds.
Heritage tree cases with neighbor opposition can extend 2–3 hearing cycles. Budget accordingly.
Receive permit with conditions
If approved, the permit includes conditions — typically 2:1 replacement planting with species requirements. The permit is valid for 180 days. Schedule removal with a C-61/D-49 licensed, insured tree service and keep the permit on site during work.
Plant replacements and confirm compliance
Plant required replacement trees per the approved plan. The Town may inspect to confirm compliance. Native or locally adapted species are strongly preferred. Document the completed planting for your project file.
What happens if you remove a tree without a permit?
50% of appraised value — plus construction can stop
Unauthorized removal of a protected tree in Atherton triggers a civil penalty equal to 50% of the appraised value of the tree, plus standard code violation fines, plus mandatory 2:1 replacement planting. On a mature heritage oak appraised at $100,000, that is a $50,000 civil penalty before replacement costs. The same penalty applies to construction damage — trenching within the Tree Protection Zone, grade changes, or paving more than 50% of the dripline area are treated the same as removal. Construction-related tree damage is the most common enforcement trigger in Atherton.
For anyone purchasing property in Atherton with plans to remodel, add, or build: identify all protected trees on the site before the transaction closes. The Tree Protection Zone (TPZ) around heritage oaks can significantly reduce buildable footprint, and discovering this after you've closed is an expensive surprise.
Atherton for real estate buyers and developers
The builder-friendly angle most buyers miss
Atherton is actually more permissive than Palo Alto, Menlo Park, or Woodside for non-oak trees in the buildable area — those can generally come down without a permit. The complexity is entirely concentrated in native oaks and setback trees. If you're evaluating a lot for development, the first thing to map is where the oaks are and whether they encroach on the buildable envelope.
I do more Tree Protection Zone reviews for Atherton remodels and new builds than any other work in the city. The typical scenario: a homeowner wants to add a guest house or expand the main structure, and a heritage oak's TPZ covers the planned footprint. The permit process, the arborist report, the Planning Commission hearing — these all take months and add significant cost. Getting an arborist assessment during due diligence rather than after escrow closes is always the right call.
Atherton Planning Department — contact and resources
Call Sally Bentz before you submit
The Town Arborist can often tell you over the phone whether your tree is likely to qualify for removal and flag any complications before you invest in an arborist report and application fee. A 10-minute call at (650) 752-0526 can save weeks of process on a case that won't be approved.
Frequently asked questions
Can I prune an oak in Atherton without a permit?
Pruning that follows ISA A300 standards and removes 25% or less of the live canopy generally does not require a permit. However, any pruning that could be classified as "excessive" or that damages the tree may trigger enforcement. When in doubt — especially on a heritage oak — call Sally Bentz first.
What if my tree is dead or an imminent hazard?
Emergency removals of genuinely hazardous trees are allowed, but document everything: photos, timestamps, the hazard condition. Notify the Town immediately and submit a retroactive permit application. "I thought it was dead" is not a valid defense if the tree was a protected oak — Atherton's enforcement is active.
Does the ordinance apply to construction projects?
Yes — and construction is the highest-risk scenario. Any grading, excavation, or construction within the Tree Protection Zone of a heritage oak requires a Tree Protection Plan approved by the Town Arborist before work begins. Construction damage is treated the same as removal for penalty purposes.
What's the difference between a heritage tree and a protected tree?
In Atherton all protected native oaks and setback trees meeting the size threshold are "heritage trees" under Chapter 8.10. Some trees are additionally individually designated by the Town for historical or ecological significance — these carry the highest protection and are the least likely to receive removal approval.
Related reading for Atherton tree owners
Need a permit-experienced arborist in Atherton?
Every company in our Atherton rankings has been verified for CSLB C-61/D-49 licensing, ISA credentials, and Atherton permit experience. Planning Commission applications benefit enormously from a well-written arborist report.