Most homes in the San Fernando Valley and Conejo Valley need their gutters cleaned twice a year. Once in October or early November before the rainy season starts, and once in late winter after the Santa Ana winds have finished stripping the trees. If you have coast live oaks, pines or eucalyptus close to the roof, plan on three or four.
That’s the short version. The longer version depends on what’s growing over your house, what your roof is made of, and where you live. Here’s how we think about it.
Why twice a year is the baseline
Southern California doesn’t have the four-season leaf drop that gutter advice from the rest of the country assumes. We have two events that matter.
The first is the rainy season, which runs roughly November through March. Everything that landed in your gutters from April through October is still sitting there when the first storm hits, dry and packed. If it isn’t out by then, water goes over the front edge instead of down the downspout.
The second is Santa Ana wind season, which overlaps the rain. From about October through February, we get days of hot dry wind out of the northeast that tear leaves, bark, seed pods and small branches off everything and drop them on roofs. One good wind event can refill a gutter you cleaned a month earlier. That’s why the cleaning before the rain isn’t always enough on its own.
So the baseline is a fall cleaning to prep for rain, and a follow-up after the winds calm down to clear what blew in mid-season. Some years the winds are quiet and the second visit is light. Some years, like the ones where we get back-to-back Santa Ana events in December and January, it’s the heavier of the two. A wet El Niño winter adds a mid-season check on top, which we cover in El Niño and your gutters.
How often is often enough for your trees?
Trees decide the schedule more than anything else. Here’s what we see on the different lots we service.
| Trees near the roof | Typical cleanings per year | Why |
|---|---|---|
| None, or small ornamentals | 1 to 2 | Dust, roofing grit and wind-blown debris only |
| Jacaranda, sycamore, liquidambar | 2 | Heavy but predictable drop, blossoms in spring, leaves in fall |
| Ficus, magnolia | 2 to 3 | Year-round shedding, leaves are big and slow to break down |
| Coast live oak | 3 to 4 | Tassels in spring, leaves all year, acorns in fall, and the leaves mat down hard |
| Pine, cedar, redwood | 3 to 4 | Needles slip through everything and pack into downspouts |
| Eucalyptus | 3 to 4 | Bark strips, leaves and seed caps all year, and the oil makes it ignite easily |
| Palms | 2, plus spot visits | Fronds are big enough to dam a whole run of gutter at once |
Oak is the one that surprises people. Homeowners in Calabasas and Hidden Hills often assume the oaks are low-maintenance because the leaves are small. But coast live oak drops a little all year, the spring tassels are like confetti, and the leaves are waxy and don’t rot down. They form a dense mat that holds water. Two visits a year isn’t enough on an oak-canopy lot.
Pine is the other one. Up against the foothills in Sylmar and Tujunga, the pines, cedars and wind-blown chaparral debris fill gutters from above and the needles pack the downspouts from inside. We see this every fall in Tujunga. A downspout full of needles doesn’t look clogged from the ground. It just stops draining.
Does the roof change the answer?
Yes. Tile roofs, which are most of the newer homes in Thousand Oaks, Porter Ranch and the Santa Clarita Valley, shed debris differently from composition shingle. The tile valleys catch leaves and hold them, then release a whole valley’s worth into the gutter in one storm. If your roof has long valleys draining into a single gutter section, that section fills faster than the rest of the house, and the schedule should be set by that spot, not the average.
Composition shingle roofs shed a lot of mineral grit, especially in the first few years after a new roof and again as the roof ages. That grit settles into the bottom of the gutter and into downspout elbows. It’s heavy and it doesn’t blow out. Older homes in Van Nuys and North Hollywood with aging comp roofs often have a half inch of grit under the leaves, and that’s what’s actually blocking the outlet.
Does the neighborhood matter?
It does, mostly because neighborhoods here come with a tree profile.
The flat central Valley (Van Nuys, Reseda, Panorama City, Winnetka) is mostly street trees and a few mature backyard specimens. Twice a year covers it.
The south Valley hillside areas (Encino, Sherman Oaks, Studio City, Woodland Hills) have more canopy, more sycamore and oak, and more houses tucked under trees. Two to three visits.
The Conejo Valley, including Thousand Oaks, Newbury Park and Westlake Village, is oak country with a lot of pine and eucalyptus planted in the 70s and 80s. Three visits is common. The wind also comes through the Conejo Grade hard, so the after-wind cleaning matters here.
The Santa Monica Mountains and the hills above Calabasas, Topanga and Malibu are the heaviest. Oak, sycamore, eucalyptus, and hillside lots with long downspout runs to the street. These are also the neighborhoods where dry gutter debris is a wildfire problem, which is a separate reason to keep them clear. We cover that in our wildfire guide.
What about gutter guards?
Guards change the schedule but they don’t end it. A good metal mesh guard keeps leaves, fronds and most needles out of the trough. What it doesn’t stop is the fine stuff: oak tassels, jacaranda blossoms, roof grit, and the layer of decomposed leaf matter that builds on top of the screen and eventually blocks water from getting through at all.
Guarded homes on tree-heavy lots usually need one gutter guard maintenance visit a year, where we clear the top of the screen, check the valleys and the inside corners, and flush the downspouts. Unguarded homes on the same lot would need three or four cleanings. That’s the trade. If you’re weighing whether guards make sense for your trees, our gutter guard guide goes through it by debris type.
How do you know it’s time?
Don’t wait for a schedule if you see any of these.
Water sheeting over the front edge of the gutter during rain. Plants sprouting from the gutter. Staining or streaks on the outside face of the gutter, which usually means it’s been overflowing for a while. A downspout that dribbles during a storm while the gutter above it is full. Birds working the gutter line, which means there’s something in there worth eating. Sagging sections, which means wet debris is sitting in there and the weight is pulling the hangers.
Any of those means it’s overdue, and the damage from waiting is real. Overflow soaks fascia, runs behind stucco, and dumps water next to the slab. What clogged gutters actually damage walks through where that water goes.
The easiest way to keep the schedule
Most people don’t forget that gutters need cleaning. They forget when. Then the first storm arrives, everyone calls at once, and the earliest opening is two weeks out.
That’s why we set up the membership plans. It’s free to join. You pick a frequency that matches your trees, we put you on the calendar for the right windows each year, and the more frequent plans cost less per cleaning. Twice-a-year members get the pre-rain and post-wind visits. Oak and pine lots go quarterly.
If you’re not sure what frequency fits your house, call us at (818) 913-1626, Monday through Saturday 7am to 7pm, or request an estimate. We’ll look at the trees and the roof and tell you straight. You can also see every area we cover.