How often should you clean gutters in Western Washington?
The national advice doesn’t fit this climate. Here’s what works here.
Most homes in Snohomish, King and Skagit Counties need their gutters cleaned twice a year: once in late fall after the leaves drop, and once in early spring. Homes under heavy Douglas fir or western red cedar need a third cleaning in late summer, when needle drop peaks. Homes with no trees over the roof can usually get by with one cleaning a year. We need more than the national “once a year” advice for a simple reason. In winter, it rains on 17 to 22 days a month in western Washington’s lowlands (Western Regional Climate Center), so debris never dries out and washes away on its own.
What cleaning schedule works in Western Washington?
| When | Why then | Who needs it |
|---|---|---|
| Late fall — November | After the leaves are down, before the heaviest winter rain | Everyone. This is the one not to skip. |
| Early spring — March or April | Clears what came down over winter, before spring rain and before moss takes hold | Most homes. |
| Late summer — August or September | Fir and cedar needles fall most in late summer, not fall | Homes under fir, cedar or hemlock. |
Why do fir and cedar trees change the answer?
Leafy trees drop their leaves in one short window. Broad leaves mostly sit on top of a gutter guard or wash through. Douglas fir, cedar and hemlock are different. They drop fine needles almost all year, with the most in late summer. Those needles knit together into a thick mat that water runs over instead of through. That’s why a gutter under fir can look nearly empty and still not drain.
Wet needles also rot. Steady light rain keeps them soaked, and within a season they turn into a heavy sludge that clogs downspouts.
What are the signs your gutters need cleaning now?
- Water spilling over the front edge in ordinary rain, not just downpours.
- Water running down the back, between the gutter and the board behind it. This is the one that causes damage, and it’s easy to miss.
- Plants growing in the gutter. Seedlings mean there’s enough packed-down debris to act like soil.
- Stains or streaks on the siding below one section.
- Sagging between brackets. Wet debris is heavy.
- Downspouts that gurgle or only trickle in heavy rain.
What happens if you skip a cleaning?
A clogged gutter overflows at the back as easily as the front. That sends water straight into the fascia (the board your gutters attach to) and the soffit under your roof edge. That’s how a cleaning problem turns into a rotted-wood problem. It usually happens quietly, over two or three winters, before anyone notices soft wood. Standing water is also heavy enough to pull nails out of the fascia over a wet season. And water dumping at the base of a wall can slowly lead to a damp crawl space.
Should you clean gutters yourself or hire someone?
Plenty of people clean their own gutters, and that’s fine on a single-story house with safe, level ground for a ladder. Two things are worth knowing. First, blowing gutters out from the ground doesn’t work on wet needles. It scatters the top layer and pushes the rest into the downspout, so it needs clearing by hand. Second, most gutter falls happen from the ladder, not the roof. A wet November is not the time to test how steady your ladder is.
Would guards change this?
They would cut the work, not end it. In a This Old House homeowner survey, 17% never had to clean their gutters after installing guards, and 41% still cleaned once a year. Under heavy fir, expect to brush off the top of the guard now and then instead of digging out the gutter. Read what guards can and can’t do, and see the cost comparison in guards vs cleaning.
If you’d rather not be on a ladder in November, see our gutter cleaning service. If you’re cleaning three times a year, compare the cost of gutter guard installation — homes under fir in Woodinville and Duvall often come out ahead with guards. For reference, professional cleaning averages $360 a visit nationally (This Old House, 2026).
Common questions
Is once a year really not enough?
It’s enough for a house with no trees over it. Under trees in this climate, once a year means your gutters spend months of every winter not draining properly.
What is the best month?
November for the main cleaning. It’s late enough that the leaves are down, and early enough to beat the worst of the winter rain.
Should I clean the roof as well?
If your roof has a lot of moss, removing it stops your gutters from refilling with sludge. Roof cleaning isn’t a service we offer, but we’ll tell you if your roof needs it.
Get a free written estimate
Call us or send your address. We will get back to you within 24 hours on business days to book a time to look at your gutters.