Siding & House Washing (Soft Wash)
Starting at $150 +tax Green and black streaks creeping up your siding aren't just dirt — they're algae and mildew finding a home in the Eastside's damp, shaded climate, usually starting on north-facing walls and under eaves that never fully dry out. Once it takes hold, it spreads.
We soft wash house exteriors for homeowners across Bellevue, Kirkland, Redmond, Issaquah, Sammamish, and Mercer Island. Soft washing is the industry-standard method for siding: low pressure and a cleaning solution do the work, so the process cleans deep without cracking panels, stripping paint, or forcing water behind trim the way high-pressure washing can.
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Before 
After What's included
- Pre-rinse & pre-treat. A gentle detergent breaks down algae and mold before any pressure touches the siding.
- Soft wash. Low-pressure, high-flow application lifts dirt off siding without forcing water behind panels or trim.
- Full-house rinse. Starting from the roofline down, working carefully around windows, outlets, and landscaping.
- Walk-around inspection. We check the shaded, high-buildup spots — north-facing walls and under eaves — where algae collects most.
Worth knowing: Soft washing is gentle by design, but siding with existing gaps, damaged caulking, or already-peeling paint can let water in or lose more paint than usual. We'll let you know if we spot anything like that before we start.
Why Eastside homes need soft washing
Bellevue, Kirkland, and Redmond all sit in a climate that stays wet and mild for much of the year, which is exactly what algae, moss, and mildew need to spread across siding. Beyond curb appeal, that buildup traps moisture against the surface — the same moisture that eventually contributes to paint failure and, on wood siding, rot. Washing before it's a visible problem is a lot cheaper than repainting or replacing siding later.
If you're not satisfied with our work, let us know within 48 hours and we'll return to make it right.
Frequently Asked Questions
What's the difference between pressure washing and soft washing my house?
Pressure washing uses high force to blast dirt off hard surfaces like concrete. Siding is more delicate — vinyl, wood, and fiber cement can crack, streak, or let water behind the panels under too much pressure. We soft wash siding instead: lower pressure, a cleaning solution that does the actual work, then a gentle rinse.
Will soft washing damage my paint or siding?
Soft washing is specifically the technique used to avoid that. High-pressure washing is what causes paint stripping and cracked siding — soft washing is the safer approach for painted or older siding.
How long does house washing take?
Most single-family homes on the Eastside take a few hours, depending on square footage, number of stories, and how much architectural detail — gables, dormers, balconies — there is to work around.
Does soft washing kill the algae, or just clean it off?
The detergent used in soft washing kills mold, algae, and mildew at the root rather than just rinsing it off the surface, which is part of why the results last longer than a plain rinse would.
Serving Bellevue, Kirkland, Redmond, Issaquah, Sammamish, Mercer Island, and the surrounding Eastside. See our full service area.
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Or call us at (425) 484-8481.