LA Has Two Seasons. Your Building Should Be Ready for Both.

Last October, I was walking the roof of a four-unit courtyard in Hollywood Dell — a 1950s wood-frame, the kind of building that handles rain by slowly confessing everything it has been hiding since spring. Two gutters were packed solid with pine needles and six months of seed pods. A section of flashing at the chimney base had lifted and sat there at a forty-five-degree angle, a direct path for the first real rain into the top-unit ceiling. We had not looked at it since May. The first storm was three weeks out. We fixed it in an afternoon. But it reminded me, again, that the owners who get hurt in this city are not the ones hit by catastrophe — they are the ones who ran out of calendar.

Los Angeles gets 12 to 15 inches of rain per year. It arrives in four or five compressed events between November and March. The rest of the year is eight months of dry that cures brush, bakes rooftop membranes, and desiccates every gasket and caulk joint on the building's exterior. The fire risk that follows is not background noise — the 2025 LA fires made clear that Very High Fire Hazard Severity Zones now include neighborhoods that considered themselves immune. Bel Air. Pacific Palisades. Parts of the Hollywood Hills that had not burned in forty years.

The way we manage this across our own portfolio is simple: two preparation windows per year, treated as fixed calendar events. October for rain. April through May for fire. Neither window is negotiable, and neither checklist is long. What follows is what we actually do.

The owners who get hurt aren't hit by catastrophe — they're the ones who ran out of calendar.— Field note, Hollywood Dell, October 2025

Why two seasons, not four.

The conventional wisdom about seasonal maintenance maps LA onto a four-season framework borrowed from climates that have four seasons. It produces vague advice: "inspect your HVAC in spring," "check for drafts in fall." None of it is calibrated to what actually fails in this city, and when.

What actually fails in Los Angeles follows a two-season pattern. The rain season — roughly November through March — produces water intrusion, foundation hydrostatic pressure, drainage failures, and the specific cruelty of slow leaks in walls that no one discovers until March. The fire season — roughly June through October, with the Santa Anas running from October into December — produces ember ignition, combustible-zone failures, and the insurance exposure that comes from not having done the work California law already requires of you.

The preparation windows for these two seasons are September–October for rain and April–May for fire. Both windows close fast. Once the first real storm arrives, contractor schedules fill within days and anything you deferred becomes an emergency call. Once the brush dries in June, defensible space violations become a fire department citation risk — and in Very High Fire Hazard Severity Zones, an insurance non-renewal.

The October drill: pre-rain.

The October drill takes roughly three to four hours on a standard four-to-eight-unit building if you are doing it yourself, or half a day for a contractor working across the exterior. These are the items we do not skip:

Gutters and downspouts. Clear accumulated debris from the full summer — leaves, seed pods, dust compaction at the bottom of the gutter. Confirm that downspout outlets are directing water at least six feet from the foundation. On hillside properties, check every French drain cleanout and confirm flow through each outlet. A blocked downspout during a three-inch overnight rain is a foundation event, not a plumbing inconvenience.

Roof and flashing. Walk the roof or have it walked. Look for lifted or missing shingles, cracked flashing at every penetration (chimney, HVAC curb, plumbing vents), and any flat or low-slope sections where the membrane shows UV cracking or ponding history. Flat roof drains clog with the same debris that clogs gutters — clear them before the rain, not during. Repair costs in October are a fraction of repair-plus-water-damage costs in January.

Interior plumbing baseline. Check under every sink and around the water heater for slow drips that have been running unnoticed since spring. Inspect ceilings below upper-floor bathrooms for discoloration. If the building has a sump pump, test it now — not when it is already raining. These checks run thirty minutes on a four-unit and can prevent the water damage calls that dominate our phones every January.

Drainage perimeter. Walk the full foundation perimeter after any early fall sprinkle. Where does water pool? Where does it run toward the structure rather than away? Confirm that ground slopes away from the foundation at every point. Window wells accumulate debris over summer — clear them. Surface swales that have grown over with vegetation since spring won't perform in January.

What the October drill costs

On a four-to-eight-unit building, the October drill runs $350 to $500 if contracted out as a single pre-season inspection, or $0 in cash if you do it yourself against a two-to-three-hour afternoon. The comparison is against a water intrusion event — which on a Westside wood-frame typically runs $10,000 to $50,000 depending on duration and affected surfaces. We budget $500 per property per October and have not had a weather-related emergency claim in four years.

The May drill: pre-fire.

The May drill is structurally different from October. October is inspection and maintenance. May is legal compliance and documentation — and for properties in Very High Fire Hazard Severity Zones, the stakes are higher than a repair bill.

Defensible space. California law requires 100 feet of defensible space around structures in Very High Fire Hazard Severity Zones — which includes most of Bel Air, the canyons, Pacific Palisades, and hillside properties throughout West LA. Zone 0 (zero to five feet from structure) must be completely non-combustible: no wood mulch, no dried vegetation, no combustible furniture resting against the structure. Zone 1 (five to thirty feet) requires dead vegetation removal and significant thinning. Zone 2 (thirty to one hundred feet) requires grass kept under four inches and reduced shrub density. These are not suggestions. They are state law, and insurance carriers are now requiring defensible space compliance documentation for VHFHSZ properties at renewal.

Roof and vents. Embers travel up to one mile ahead of a fire front. They land on roofs and in vents. Confirm your roof material is Class A — this is the minimum fire rating for insurance retention in the highest-risk West LA zones. Inspect all attic and foundation vents: standard mesh venting allows ember intrusion. Ember-resistant vent products (Brandguard and Vulcan Vent are the two manufacturers we have used) dramatically reduce this risk and are a straightforward retrofit on most buildings. Clear any debris from roof valleys and gutters — dried leaf material in gutters is a direct ember-to-ignition path and one of the most common ignition sequences in urban interface fires.

Insurance documentation. Before fire season, conduct a room-by-room video walkthrough of the property's contents and mechanical systems. Open every closet. Record serial numbers on major appliances. Store documentation in cloud or off-site — not on a device that may be lost in the same event. Property owners who suffer the largest losses after a fire event are consistently those with no pre-loss documentation. This takes ninety minutes. There is no excuse not to do it.

The prep cost table.

The contracted cost range is wide because building condition, hillside exposure, and VHFHSZ status all move the number. A flat-roof Mid-Wilshire four-unit costs less to prep than a hillside Hollywood Dell eight-unit with a canyon behind it. The DIY time column is the more useful comparison for operators who do their own property walks — five to six hours per building, per year, against the risk profile above.

Running both drills on a calendar.

The failure mode we see most often is not neglect — it is good intentions that slip. An owner plans to get to the roof in September, October arrives, the first rain falls in early November, and the gutters are still full. We have been there. The fix is to treat both windows as fixed calendar events with the same priority as a lease renewal or a tax deadline.

We schedule the October drill every year in the last two weeks of September — before any early fall storms and before contractor schedules fill. The May drill goes on the calendar in the first two weeks of April, before the brush dries and before the fire department inspection season starts. Both dates go into the operating calendar for every property at the start of the year. They do not move for other reasons.

One practical note on sequencing: the October drill reveals deferred work that needs scheduling before the rain. If you find lifted flashing, a compromised flat roof section, or a drainage problem, you have roughly three to six weeks to address it before the season opens. That window is tight. Start the October walk in late September, not mid-October.

Three practical moves:

1. Put both prep windows on your 2026 operating calendar today — September 22 for the rain drill, April 7 for the fire drill — and treat them as non-negotiable property events.

2. On your next October walk, bring the pre-rain checklist and document every finding with a photo. Repair tickets without photos are arguments. Repair tickets with photos are invoices. The documentation habit pays back every time a tenant claim or an insurance question arrives.

3. For any building in a Very High Fire Hazard Severity Zone, order a defensible space inspection from a licensed professional before April. The documentation that produces is what your insurance carrier will ask for at renewal, and getting it done early means you have time to act on what it finds.

— End of Entry № 051 · Los Angeles, April 21, 2026