Fall in the Conejo Valley is not raking-leaves season. It is Santa Ana season. From October into December we get the driest, windiest, most fire-prone stretch of the year, followed by the first real rain hitting hillsides that have not seen water since March. A fall checklist here looks nothing like a fall checklist in Ohio. Here is the one I actually give clients.
Wind and ember protection — do this first
Embers, not flame fronts, are what take most homes. And the new state rules make this the priority item anyway.
- Clear the first five feet around the house. This is “Zone 0,” the ember-resistant zone. California’s Board of Forestry voted 8–0 on August 19, 2026 to adopt the first statewide Zone 0 regulations. Regardless of exactly when compliance deadlines land, the logic is sound: no bark mulch against the foundation, no junipers under the eaves, no woodpile against the wall, nothing combustible stored under the deck.
- Clean the roof and gutters. The single highest-value hour of work you will do. Dry needles in a gutter are a wick.
- Check vents, eaves and the gap under the garage door. Ember entry points. Fine metal mesh screening on vents is cheap.
- Secure or store loose outdoor items. Patio umbrellas and cushions become projectiles and kindling in a 50 mph gust.
- Confirm this year’s clearance requirements with LA County Fire or Ventura County Fire, depending on which side of the line your parcel sits.
The full breakdown is in my guide to fire hazard zones, brush clearance and insurance.
Trees — and the local rule people trip over
Fall is the right time for tree work here, but read this first. Both Thousand Oaks and Westlake Village have oak tree protection ordinances. Native oaks above a certain size are protected, and pruning or removing one without a permit can result in real penalties. This valley is named for its oaks and the cities take it seriously.
So: hire an arborist who works locally and knows the ordinance, and get the permit if one is required. What you generally want done before Santa Ana season is deadwood removal, limbing branches back off the roof, and separating tree canopies from each other. What you do not want is an unlicensed crew topping a heritage oak.
While you are looking up: watch for signs of bark beetle stress on pines and oaks. Westlake Village maintains public guidance on it because it has been an ongoing regional issue, and a stressed or dead tree near the house is both a fire problem and a wind problem.
Water — the part everyone forgets until November
The first significant rain of the season is when hillside properties find out what they should have done in October.
- Test your drainage. Run a hose at the top of any slope, swale or area drain and watch where the water actually goes. Do it now, not in a storm at 10 p.m.
- Clear area drains and catch basins of the summer’s accumulated debris.
- Check grading against the foundation. Soil should fall away from the house. Years of mulch top-dressing quietly reverses this.
- Look at bare slopes. Ground cleared for brush abatement is also ground with nothing holding it. If you have exposed slope above a structure, talk to a landscape professional about erosion control before the rains.
- Reset your irrigation controller. Coming out of summer, most systems are running double what a Conejo Valley landscape needs in October, and it is money and water straight into the storm drain. If your water service comes from Las Virgenes Municipal Water District, check current programs and rebates.
Power outages and PSPS
High wind means public safety power shutoffs. Practical prep:
- Confirm your address’s outage notification settings with your utility, and make sure the contact info is current.
- Charge and test whatever backup you have. If you have a generator, run it now.
- Know that a shutoff means your electric gate, garage door and Wi-Fi-dependent security may all be down. Know the manual release on your garage door.
- Keep enough water, medication and pet supplies for a couple of days, plus N95s. Smoke is a routine feature of fall here even when the fire is far away.
- Have a go-bag and an actual evacuation plan with two routes out of your neighborhood. If you live on a canyon road with one way out, plan accordingly.
Systems and interior
- HVAC: change filters after a summer of heavy use, and switch to a higher-MERV filter for smoke season if your system tolerates it.
- Fireplace and chimney: if you use it, get it swept and check the spark arrestor — which is also a fire-code item in hillside areas.
- Smoke and CO detectors: test them, and note that California requires 10-year sealed-battery units on replacement.
- Water heater strapping and a known shutoff location. This is earthquake prep, but fall is when you actually get to it.
If you are thinking about selling
Two fall-specific notes.
The light is better than you think. October and November give you low, warm afternoon light and green hills after the first rain — genuinely the best photography window of the year in this valley. Summer photos of a Conejo Valley house are harsh and the hills are brown.
Document your fire mitigation and keep it in a folder. Photos of cleared Zone 0, gutter cleaning receipts, arborist invoices, roof condition, any home-hardening work. Buyers and their insurers now ask, and being the seller who hands over a tidy file rather than shrugging is a real advantage in this market. It is the cheapest credibility you can buy.
Frequently asked questions
When do Santa Ana winds happen in the Conejo Valley?
They typically begin in early fall and peak from October into December, though events can occur from September through spring. They bring very low humidity and high offshore winds, which is why fall is the highest-risk fire period locally.
Do I need a permit to trim an oak tree in Thousand Oaks or Westlake Village?
Often yes. Both cities have oak tree protection ordinances covering native oaks above certain sizes, and pruning or removal may require a permit. Check with the city before any work and use an arborist familiar with the local ordinance.
What is Zone 0 and does it apply to my home?
Zone 0 is the ember-resistant zone within five feet of a structure, created by AB 3074. The state Board of Forestry adopted the first statewide regulations on August 19, 2026. Applicability and compliance timing depend on your fire hazard severity zone and whether the structure is new or existing — confirm with your county fire agency.
What should I do before the first rain?
Test drainage with a hose, clear area drains and gutters, check that soil grades away from the foundation, and address erosion control on any bare slope above a structure.
Is fall a good time to list a home in the Conejo Valley?
It can be. Inventory is lighter than spring, the remaining buyers tend to be more committed, and fall light photographs far better than summer light. Pricing discipline matters more because the buyer pool is smaller.
Want a walkthrough of your own property before Santa Ana season — or an honest read on whether a fall listing makes sense for you? Get in touch, or start with a free valuation.
Related: Fire zones, brush clearance and insurance · Why goats clear the hillsides · Fall in the Conejo Valley
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