Serving the Seattle Eastside
House Washing
House Washing for Eastside homes — safe on vinyl, Hardie, cedar, brick, and stucco. Licensed, Bonded, and Insured.
The green film that creeps up the north-facing side of your siding isn't mildew in the common sense — it's algae, and it's actively feeding on the surface. Left untreated, it works into the paint layer, causes premature peeling, and accelerates oxidation on vinyl. Most Eastside homeowners don't realize how much their house has dulled until they see the half-washed line when we're partway through a job. The difference between the treated and untreated sides is that stark.
Why Eastside Homeowners Choose PNW Softwash for House Washing
House washing uses a soft wash process — low pressure with a biodegradable surfactant solution — rather than high pressure that would force water behind the siding. We apply solution to every surface: eaves, soffits, fascia, all siding faces, trim, window frames, and garage door panels. The surfactant breaks the bond between the algae and the surface; we then rinse clean with a thorough low-pressure wash.
We work from ladders and extended poles — we don't put ground-crew boots on your roof or pressure wash up under your siding laps. Every window and door is pre-covered or approached at a safe angle to avoid forcing water into the structure.
The Difference Is Visible
Real results from homes across the Eastside.
House Wash — Pine Lake
House Wash — Covington
House Wash — Renton
Drag the handle to reveal the transformation. Real homes, real results.
What Our House Washing Service Includes
Standard house washing includes all exterior siding faces, eaves and soffits, fascia boards, window frames and sills, trim, and garage door exterior panels. We pre-wet all landscaping and cover any electrical outlets, HVAC intakes, or exposed junction boxes before applying solution.
We can add gutter exterior cleaning (the black streaks that run down the front of white gutters — called tiger striping) as an add-on. We also offer a combined house wash + roof wash package that covers both surfaces in a single visit at a bundled rate.
Pricing for a standard single-story home starts at $450–$600. Two-story homes typically run $600–$900 depending on square footage and siding complexity. Cedar and Hardie board siding require slightly different solution concentrations — we adjust per material.
What Homeowners Say
★★★★★
“We recently had our siding cleaned along with our driveway and backyard and I can't say enough good things about this company! From start to finish, they were professional, responsive, and incredibly detail-oriented. Everything looks brand new again! They took their time, made sure everything was done right and left everything spotless when they finished. If you're looking for a company that truly cares about quality and takes pride in their work, I highly recommend them. We'd definitely use them again.”
— Kristen W
★★★★★
“PNW Soft Wash did an absolutely outstanding job on my brick surfaces. Their professionalism and attention to detail are truly exceptional. They take the time to understand the material they're working with, and their deep knowledge of brick washing shows in every part of the process. What impressed me most is how committed they are to doing the job right. They don't rush, they don't overlook anything, and they go to great lengths to make sure every brick is cleaned safely and thoroughly. You can tell they genuinely care about the quality of their work and the long-term condition of your home. If you want a team that is detail‑oriented, highly skilled, and dedicated to delivering the best results possible, PNW Soft Wash is the company to hire. I couldn't recommend them more.”
— I Smiga
★★★★★
“Reasonable price Brendan communicated very well as to schedule and work to be done. He seems young but really knows his stuff and is very capable. Our house looks amazing now. So clean! They work hard and are very conscientious and careful. I would hire them again and highly recommend them.”
— Beth C
House Washing — Every City We Serve
Select your city for local pricing, neighborhood-specific details, and free same-day quotes.
House Washing — Frequently Asked Questions
Honest answers from a Licensed, Bonded, and Insured crew that works on the Eastside every week.
How much does house washing cost?
- Pricing varies by home size, siding type, number of stories, and contamination level. We provide free, no-obligation estimates and respond quickly. Contact us for a quote specific to your home — every property is different, and we believe in transparent pricing with no surprises.
What happens if something is damaged?
- We carry comprehensive insurance coverage for exactly this reason. If something is damaged during our work, we'll make it right. We stand behind our work with a 100% satisfaction guarantee. Your property is protected from the moment we arrive to the moment we leave.
Why does my siding look green and how long will results last after cleaning?
- That green buildup is algae, mildew, and moss actively growing on and into your siding. It's not just cosmetic — it traps moisture against your home, which accelerates deterioration, promotes wood rot, and can lead to expensive repairs. In our Pacific Northwest climate, this growth is nearly inevitable without professional maintenance. Our soft washing kills it at the root so it doesn't come back for 1–3 years.
What's the difference between soft washing and pressure washing for house siding?
- Soft washing uses low-pressure water with specialized cleaning solutions to kill organic growth at the root level. Pressure washing relies on brute force — which can damage siding, force water behind it causing interior moisture problems, void warranties, and leave root systems intact so growth returns quickly. Soft washing delivers longer-lasting results with zero risk of surface damage.
Is soft washing safe for fiber cement siding?
- Yes. Fiber cement siding actually benefits from professional soft washing that preserves its factory finish and protective coating. We use fiber cement-compatible solutions and warranty-compliant methods recommended by manufacturers. Considering that fiber cement installation costs $12,000–$25,000, professional maintenance is essential for protecting your investment.
Ready to Book House Washing?
Free same-day quotes. Serving the entire Seattle Eastside.