An oak tree permit comes before pruning an oak to get your Calabasas home ready to sell. The rules also cover digging, paving and other work near the tree.
Earlier work without a permit requires a retroactive permit and the associated mitigation. Removal of an oak or scrub oak habitat may result in a building or improvement moratorium of up to ten years placed on the property, which would apply to a subsequent owner until its term ends. This is an explanation for sellers and buyer’s agents, not a legal opinion.
What is Calabasas’s Oak Tree Ordinance?
The ordinance is Chapter 17.32 of the Calabasas Municipal Code, titled Oak Tree Regulations.
Within Title 17, the city’s land use and development code, the whole chapter is a single section, 17.32.010. It states a policy of preserving oaks and scrub oak habitat and gives owners a continuing responsibility for their care.
Anyone who owns, controls or has custody of real property in the city must keep its oaks in good health under the Oak Tree Preservation and Protection Guidelines. Those guidelines were adopted by council Resolution 91-36 and are kept on file with the city clerk.
Which trees and which ground are protected?
The code covers Valley oak and California live oak measuring four inches or more in diameter at breast height, plus scrub oak, and regulates the ground around them.
Section 17.90.020 measures diameter at breast height four and one-half feet above grade on the tree’s high side. It defines scrub oak habitat as a thicket of three or more scrub oak shrubs or small trees.
The protected zone starts five feet outside the drip line and runs inward to the trunk, never less than 15 feet from an oak’s trunk or 50 feet from a heritage oak’s trunk.
The permit tiers use the term heritage oak, but the definitions chapter does not define it. Ask the city whether your tree counts and how the zone applies.
Does even a little pruning need a permit?
Yes, pruning is included in the definition of altering an oak, and altering one requires a valid oak tree permit.
Section 17.32.010(C)(1)(a) applies to any real property in the city, including a private backyard. The definition includes removing, cutting or pruning, poisoning and over-watering, along with excavating or paving inside the protected zone.
A tree under two inches in diameter needs no permit, except for scrub oak habitat and trees planted as mitigation for an earlier removal. Oaks damaged by a storm, fire or similar event are exempt once city staff verifies the damage.
Routine care can still need a minor oak tree permit. That includes removing deadwood, insect spraying, fertilizing, cabling, mulching and watering, and clearing for safe passage of people, vehicles or structures.
Pruning for fuel modification also needs a minor permit, with official agency documentation verified by city staff before work starts. The wildfire hardening guide covers the defensible space side.
Who decides which work gets approved?
For removal of up to three living oaks, each under six inches in diameter and no more than twelve inches combined, the community development director can approve the work. That limit is counted cumulatively for the parcel.
The director can also approve removing dead or hazardous oaks as determined by the director and city arborist, clearance pruning of no more than a quarter of an oak’s live foliage, and minor encroachments, such as a fence, affecting up to a tenth of the protected zone.
Requests beyond those removal, pruning or encroachment limits go to the Planning Commission. So do impacts to a tree the commission or council has formally designated as special.
Removing a living heritage oak goes to the City Council, as does any oak permit connected to a project needing separate council approval.
What goes into the permit application?
The application includes the city’s general and supplemental oak tree applications, and most permits also need an oak tree report.
For a standard permit, the submittal checklist calls for two copies of an oak tree location map and two copies of the report. That form was last revised in May 2010, so ask for current requirements. A minor permit asks only for the general and supplemental applications, plus anything else the director wants.
The report must come from a city-qualified arborist. Before hiring, consult the Planning Division’s list of qualified people and companies, as the application form directs.
Under subsection F, the report covers an oak inventory; a map showing each trunk, dripline and protected zone; planned site work such as foundation excavation; an impact analysis; and a mitigation program.
Conditions can include planting one inch of oak diameter for each inch removed, a performance bond, and annual monitoring by a city-qualified arborist for at least five years after construction as site conditions warrant. The applicant pays for monitoring. Ask the city for its current mitigation schedule, and include planned work in your cost to sell estimate.
What if someone already worked without a permit?
The code treats a violation as a misdemeanor and requires a retroactive permit and the associated mitigation.
Under subsection J, a violation during construction brings an immediate stop-work order. Work cannot resume until permits are obtained and mitigation is complete.
Removing an oak or scrub oak habitat may also bring a building or improvement moratorium for up to ten years. A moratorium placed on the property would apply to later owners until the term ends. A notice of noncompliance may also be recorded on the property.
The supplemental application’s retroactive permit section asks how many oaks were removed or pruned, when, by whom and who authorized the work.
How could an oak issue come up during your sale?
An issue can surface through a recorded notice, a recorded permit condition, ongoing monitoring or unpermitted work near a trunk that the buyer’s side spots.
Removing up to three small oaks under the director’s authority triggers a recorded notice that later removals need Planning Commission approval. Permit conditions can also be recorded, with wording approved by the director.
Any other development permit must comply with the oak rules, and Section 17.84.060 repeats that requirement for ministerial design review permits. Check a fence, pool, addition or paving near a trunk.
If work went in without a permit, the unpermitted work disclosure guide explains how that is treated in a California sale. The seller disclosure guide covers what the state forms ask.
What should you check before listing or writing an offer?
The desk’s Calabasas market read for the week of October 5, 2026, with data as of October 7, 2026, counted 8 new listings, 9 price cuts, 4 closed sales and 4 homes going under contract. A seller listing soon competes with that supply, and an unanswered oak-permit question can slow a buyer down.
As a seller, ask the Planning Division about any oak tree permit, recorded notice or noncompliance notice for your property. If you’re planning pruning before showings, the permit comes first.
A pre-listing inspection and an arborist visit help you see the property the way a buyer’s side will.
For a buyer’s agent, ask the listing side about oak permits, pruning history, recorded notices and monitoring still running. Protected zones matter especially for a planned pool, fence or addition. A title professional can say what is recorded.
An oak permit doesn’t remove other obligations. The code points to state protection for nesting birds and the California Environmental Quality Act.
Licensed in California as a real estate agent and certified by InterNACHI as an inspector, Zarko Maletin is behind Insider Realty. Its city market reports, including the weekly Calabasas read, track new listings, price cuts, closed sales and homes going under contract each week.
The short version
Calabasas requires an oak tree permit before pruning, removing or digging near a protected oak. Work without a permit requires a retroactive permit and the associated mitigation. Removal of an oak or scrub oak habitat may result in a building or improvement moratorium of up to ten years placed on the property, which would apply to a subsequent owner until its term ends.
Your tree’s protected zone, permit history and a city-qualified arborist’s assessment matter before work or before listing.
To discuss selling your Calabasas home with oaks, start a conversation about your specific property with the home value tool.
Common questions
Can I trim a few oak branches before listing?
Pruning counts as altering an oak, which requires a valid oak tree permit. Some routine care falls under a minor oak tree permit.
How far does an oak's protected zone reach?
It starts five feet outside the drip line and runs inward to the trunk. It is never less than 15 feet from an oak's trunk, or 50 feet from a heritage oak's trunk.
Can an earlier owner's oak violation affect my property?
After removal of an oak or scrub oak habitat, a building or improvement moratorium of up to ten years may be placed on the property and would apply to a later owner until its term ends. A notice of noncompliance may also be recorded.
Who can prepare the oak tree report?
The code calls for a city-qualified arborist. The city's application form says to contact the Planning Division for its list of qualified people and companies.
