In Calabasas, cutting down an oak tree without a permit can put a building moratorium on your property for up to ten years.
Not a fine. A moratorium. The city can stop you from building or improving anything on that parcel — and the ordinance puts that restriction on the property, not on the person who cut the tree.
Here is the exact sentence, from Calabasas Municipal Code section 17.32.010(J)(4):
“Removal of an oak tree or scrub oak habitat may also result in a building or improvement moratorium being placed on the property for a period not to exceed ten (10) years.”
If you are buying a lot in Calabasas, remodeling a house, putting in a pool, or clearing brush around a deck, this is the single most expensive rule in the city that almost nobody reads before they start.
Executive summary
- Calabasas Municipal Code section 17.32.010(J)(4) allows a building or improvement moratorium of up to ten years on a property where an oak tree or scrub oak habitat was removed.
- An oak tree permit for a single-family home tied to a construction project costs $4,693 under the city’s fee schedule for July 1, 2026 through June 30, 2027. A permit not tied to construction costs $1,631.
- The only size exemption in the ordinance is for oaks under two inches in diameter — and even that disappears if the tree sits in scrub oak habitat or was planted as mitigation for an earlier removal.
- Pruning requires a permit. Calabasas does not have a routine-maintenance exemption the way unincorporated Los Angeles County does.
- Replacement is inch for inch: “One inch of oak tree diameter shall be planted for each inch of tree removed.”
- The city asks property owners to contact the Planning Division before any construction or earthwork within 200 feet of an oak tree — a radius that covers most of a typical Calabasas lot.
- In unincorporated Los Angeles County, five minutes away in Monte Nido, the permit threshold is eight inches in diameter. In Calabasas it is two. Same canyon, different rulebook.
- The Natural Hazard Disclosure report a buyer receives in escrow does not cover tree ordinances. California Civil Code section 1103.2 lists six hazard zones, and none of them is a tree.
Why this is a real estate question, not a landscaping question
Most people meet the oak ordinance after they have already spent money.
A buyer closes on a lot with a beautiful stand of oaks and a plan for a 6,000-square-foot house. The oaks are not in the footprint. That is not the test. The test is whether the work encroaches into the protected zone around the trees — the root area, which extends well past the branches. Once the protected zone is on the site plan, the buildable area is smaller than the lot line suggested.
A homeowner hires a tree service to “clean up” three oaks before listing. The crew takes off more than a quarter of the foliage. That is now a Planning Commission item, not a staff approval.
A seller clears defensible space before fire season and takes out four scrub oaks. Scrub oak habitat has no size exemption at all.
None of these people were trying to break a rule. They did not know there was one.
What actually triggers a permit
The operating sentence in the ordinance is short and very broad:
“No person shall alter any oak tree or scrub oak habitat on any real property within the city, unless a valid oak tree permit is issued.”
Alter. Not remove. Not kill. Alter.
The City of Calabasas Planning Division spells out what that covers in practice. An oak tree permit is required for:
- Removal of protected oak trees
- Pruning of any oak trees
- Encroachments into a protected zone
- Replacement or repair work inside a protected zone
And the city asks owners to call Planning before starting construction or earthwork within 200 feet of oak trees, and before pruning or removing them.
Two hundred feet. Stand in your driveway in Old Town, or off Mulholland, or on Park Sorrento, and draw a 200-foot circle. On most lots in this city, that circle contains an oak.
The exemptions are narrower than people assume
There are three, and they are small:
- Trees under two inches in diameter — unless the tree is inside a scrub oak habitat, or was planted as mitigation for a previous removal.
- Storm or natural disaster damage, verified by the city.
- Emergency utility work, with notice to the city.
That is the list. There is no “it’s my property” exemption, no “it was already half dead” exemption you can decide on your own, and no routine-pruning exemption.
Who decides: staff, commission, or council
The ordinance sorts applications by how much damage is proposed. The director and staff can approve the small stuff. Everything above it goes to a public hearing.
Staff level, under section 17.32.010(D)(1):
- Removal of “up to three living oak trees, less than six inches in diameter each, and not greater than twelve (12) inches in diameter aggregate”
- Pruning for clearance from structures, roads, sidewalks or trails “comprising not more than twenty-five (25) percent of the live foliage for each oak tree”
- “Minor encroachments into a protected zone of an oak tree including, but not limited to, fence installations or minor improvements that may impact up to ten (10) percent of the total area included within the protected zone”
Planning Commission: anything beyond those limits — more trees, bigger trees, more than a quarter of the foliage, more than ten percent of the protected zone.
City Council: heritage oaks, and projects that already require council approval.
The practical read: a fence post inside the root zone can be a counter transaction. A pool deck on the same side of the same tree is a hearing with an agenda packet, a staff report, and neighbors who can speak.
The money
These are the city’s own numbers, valid July 1, 2026 through June 30, 2027:
| Fee schedule line | What it covers | Amount |
|---|---|---|
| 2.3.7.1 | Oak tree permit, single-family (1 unit), linked to a construction project | $4,693 |
| 2.3.7.2 | Oak tree permit, single-family (1 unit), not linked to a construction project | $1,631 |
| 2.3.8.1 | Oak tree permit, other properties, linked to a construction project | $6,257 |
| 2.3.8.2 | Oak tree permit, other properties, not linked to a construction project | $3,261 |
| 2.8.6 | Oak tree mitigation fee | Per Resolution 91-36 |
That is the application fee. It is not the cost.
On top of it you will generally need an arborist report prepared by a certified professional, replacement trees, and — where the city requires it — a security deposit. The ordinance says the city “may require adequate security to ensure performance, correct construction procedures, reforestation, monitoring and maintenance, in an amount to be determined by the city.”
And the replacement standard is not one tree for one tree. It is diameter for diameter:
“One inch of oak tree diameter shall be planted for each inch of tree removed. Scrub oak habitat shall be replaced on a land area basis.”
A single mature oak measuring 30 inches across is thirty inches of replacement planting. If your lot cannot hold that, it goes somewhere else, and you pay for it.
The comparison that explains why people get caught
A lot of the confusion in this market comes from the fact that “Calabasas” means two different things. There is the City of Calabasas, and there is everything around it in unincorporated Los Angeles County — Monte Nido, stretches of the canyons, parcels with Calabasas mailing addresses that the city does not govern.
They do not have the same tree rules.
A contractor who has worked the county side for twenty years can walk onto a city parcel and do something that was legal on his last six jobs. The address looks the same on the invoice. The rule is four times stricter.
If you are buying, confirm which jurisdiction the parcel is in before you plan anything. That one phone call is free.
What this means in a transaction
Here is where it gets uncomfortable, because the disclosure system is not built to catch it.
The Natural Hazard Disclosure report will not tell you. California Civil Code section 1103.2 defines what an NHD covers: special flood hazard areas, dam inundation, very high fire hazard severity zones, wildland fire areas of state responsibility, earthquake fault zones, and seismic hazard zones. It is a closed list. A municipal tree ordinance is not on it. A buyer can receive a clean NHD on a parcel where an oak was removed last year.
The standard seller disclosures ask about it only indirectly. The Seller Property Questionnaire used across California asks sellers about problems with trees on the property and about restrictions affecting improvements. The Transfer Disclosure Statement asks about work done without required permits. Those questions reach an oak problem only if the seller connects the dots — and most sellers genuinely do not know their own tree work required a permit.
So the question has to be asked directly. If you are writing an offer in Calabasas, ask in writing: have any oak trees been removed, pruned, or worked on at this property, and was a city permit issued? Then verify with the Planning Division rather than taking the answer at face value. The city keeps the permit records. You are allowed to ask for them.
And if you are the seller, the answer to that question is worth knowing before a buyer asks it, not after. A surprise in escrow is one of the quieter reasons a Calabasas listing comes back on the market.
The one thing I could not confirm, and it matters
I could not confirm whether a ten-year moratorium under section 17.32.010(J)(4) is recorded against the property in county records.
The ordinance says the moratorium is “placed on the property.” It does not say the city records a notice, and I did not find a recorded-notice requirement in the code text. If the city does record it, a title search picks it up. If the city does not, the restriction may live only in a planning file at 100 Civic Center Way — and a buyer would have no way to find it without asking.
I am not going to guess at that under my name. Ask the Planning Division directly at (818) 224-1600 whether any oak tree enforcement action or moratorium exists on the parcel. On a vacant lot, or a property where recent tree work is visible, I would treat that call as part of due diligence, the same way you would order a sewer scope.
Sometimes the tree is the reason the house is worth what it is
I have been writing about restrictions for most of this page, so here is the other side, and it is the honest one.
The oaks are why Calabasas looks like Calabasas.
Drive Old Topanga, or the stretch of Mulholland above the Commons, or the lanes inside the older gated communities, and what separates this city visually from a newer suburb thirty minutes east is a canopy that took two hundred years to grow. The ordinance is strict because that canopy is not replaceable on any human timeline. When we lost the Hanging Tree in Old Town — a valley oak estimated at 200 to 250 years old, taken down on July 20, 2017 after drought and internal rot made it unsafe — the city replanted a coast live oak and kept the wood. That is the whole posture of this city toward its trees, in one event.
A mature oak in the right spot on a lot is an asset that a buyer can see from the street and cannot buy anywhere newer. The ordinance protects the thing that supports the price. It is worth the paperwork. It is just not worth being surprised by.
Three things to do before you touch a tree
- Call the Planning Division before the crew, not after. (818) 224-1600. Describe what you want to do. Ask whether it is a Minor Oak Tree Permit, a full oak tree permit, or exempt. Put the answer in an email to yourself with the date.
- Get the protected zones drawn on your plans early. If you are designing a remodel, pool, addition, or driveway, have the oaks and their protected zones on the survey before the architect commits to a footprint. Moving a wall on paper costs nothing. Moving it after a Planning Commission hearing costs a season.
- If you are buying, ask about tree history in writing. Removals, pruning, permits, and any enforcement contact from the city. Then verify with the city.
Frequently asked questions
Do I need a permit to trim an oak tree in Calabasas?
Yes. The City of Calabasas requires an oak tree permit for pruning of any oak tree. Unlike unincorporated Los Angeles County, Calabasas does not exempt routine maintenance pruning. Pruning that removes no more than 25 percent of the live foliage for clearance from structures or roadways can be approved at staff level; more than that goes to the Planning Commission.
What size oak tree is protected in Calabasas?
The ordinance exempts oaks less than two inches in diameter, and even that exemption does not apply if the tree is within a scrub oak habitat or was planted as mitigation for a prior removal. In practice, essentially any oak on a Calabasas property is regulated.
How much does an oak tree permit cost in Calabasas?
Under the city fee schedule effective July 1, 2026 through June 30, 2027, an oak tree permit for a single-family property is $4,693 when linked to a construction project and $1,631 when not. For other properties the fees are $6,257 and $3,261. Those are application fees only, and do not include the arborist report, replacement trees, or any security the city requires.
What happens if you cut down an oak tree in Calabasas without a permit?
Calabasas Municipal Code section 17.32.010(J)(4) provides that removal of an oak tree or scrub oak habitat “may also result in a building or improvement moratorium being placed on the property for a period not to exceed ten (10) years.” The restriction is described as being placed on the property, which means a future owner can inherit the consequence.
Will the Natural Hazard Disclosure report show an oak tree problem?
No. California Civil Code section 1103.2 limits the Natural Hazard Disclosure statement to six hazard zones — flood, dam inundation, very high fire hazard severity, wildland fire state responsibility areas, earthquake fault zones, and seismic hazard zones. Municipal tree ordinances are not included. You have to ask the seller and verify with the Planning Division.
Is Monte Nido covered by the Calabasas oak tree ordinance?
Parcels in unincorporated Los Angeles County, including much of Monte Nido, are governed by the county oak tree rules, not the City of Calabasas ordinance — even where the mailing address says Calabasas. The county threshold is eight inches in diameter measured 4.5 feet above mean natural grade, and replacement is two trees for one. Confirm the jurisdiction of a specific parcel before planning any work.
How many replacement trees do I have to plant?
The Calabasas ordinance requires replacement by diameter, not by count: “One inch of oak tree diameter shall be planted for each inch of tree removed.” Scrub oak habitat is replaced on a land area basis.
A note on these sources
Every quotation above is taken from the text of Calabasas Municipal Code Chapter 17.32 and from the City of Calabasas Planning Fee Schedule valid July 1, 2026 through June 30, 2027. The permit-category and 200-foot guidance comes from the city’s Planning Division environment page. The Los Angeles County figures come from the county’s oak tree permit regulations.
Four things I could not verify and am flagging rather than guessing:
- The definitions. The ordinance itself does not define “protected oak tree,” “protected zone,” “heritage oak,” or “alter.” Those live in the city’s Oak Tree Preservation and Protection Guidelines adopted by Resolution 91-36, and the copy the city publishes online is a scanned image with no readable text. If you need the exact protected-zone formula or the heritage-oak threshold for a specific property, request a readable copy from the Planning Division.
- The Minor Oak Tree Permit fee. The city describes a Minor (Healthy) Oak Tree Permit category, but I did not find a separate line item for it in the fee schedule.
- Whether a moratorium is recorded. Covered above. Ask.
- Enforcement frequency. I found no published count of how many oak tree violations or moratoria Calabasas has issued. The rule exists; how often the city uses the strongest tool in it is not public information I could locate.
Where the record was unclear, I said so instead of filling the gap. If you find something that corrects any of this, tell me and I will update the page.
Thinking about buying a lot, remodeling, or selling in Calabasas? The oaks are one of maybe a dozen local rules that change what a property is actually worth and what you can actually do with it. I work this market every day from an office on Calabasas Road — 13 years and $152M in career sales volume — and I would rather walk a property with you before you write an offer than explain a moratorium afterward.
Shane Marechal, REALTOR®, Beverly & Company
23801 Calabasas Road #1029, Calabasas, CA 91302