House Soft Washing
in Portland, OR
Green Siding Cleaned Without the Damage
Green algae creeping up the north side of your house? Mildew streaks on the siding, grime under the eaves? In Portland’s wet climate every home exterior grows something eventually, and blasting it with high pressure forces water behind siding, strips paint, and etches soft surfaces. We soft wash instead: an eco-friendly detergent kills and lifts the growth, then a low-pressure rinse washes it away. Clean siding, no damage.
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Video demonstration of our soft washing service.
Why Portland Siding Turns Green and Why High Pressure Is the Wrong Fix
Algae, mildew, and moss love the same thing Portland provides for free: months of damp shade. North-facing walls, siding under trees, and shaded corners go green first, and dirt and pollen bond to the film so rain can’t rinse it.
The instinct is to pressure wash it off. On hard concrete, that’s right on a house, it’s how damage happens:
- High pressure forces water behind siding into sheathing and insulation, where it stays.
- It strips paint and etches wood, vinyl, and stucco, leaving wand marks you can’t undo.
- It removes the growth but not the cause; the algae comes back because nothing killed it.
Soft washing fixes all three: a biodegradable detergent kills the growth and breaks its bond, then a low-pressure rinse, about the strength of a garden hose, carries it away. It’s the method we use on every roof, and it’s the right one for every painted or delicate surface on your home.
Get a Free Soft Washing Estimate
Not sure where to start? That’s normal. We’ll ask a few quick questions about the type of buildup, then recommend the best-fit cleaning option for your house and budget.
What House Washing Costs in Portland
Most Portland house exterior soft washes cost between $500 and $1,500. Your exact price depends on home size and number of stories, siding type (vinyl, wood, fiber cement, stucco, painted brick), level of algae and mildew buildup, and whether you combine it with our other cleaning services (roof cleaning, gutter cleaning, or pressure washing: one visit costs less than separate bookings). You’ll get an exact, itemized quote before we schedule anything: usually the same day. Send us your address and a couple of photos. You’ll get an exact, itemized quote before we schedule anything: usually the same day.
Small Home
Typical price range: $500–$800
Average Cost: ~$650
Medium Home
Typical price range: $800–$1,100
Average Cost: ~$850
Large Home
Typical price range: $1,000–$1,500
Average Cost: ~$1,250
For larger homes, multi-story access, and heavy algae buildup, the total project cost can reach ~$1,500+.
Our 4-Step House Soft Wash Process
We move furniture away from the walls, cover ponds, pools, and hot tubs, and wet down landscaping around the work area before any detergent is applied.
An environmentally friendly, biodegradable soft-wash detergent goes onto the siding and soaks in, killing algae and mildew and breaking the bond between grime and surface.
We rinse the walls top to bottom at low pressure: enough to carry the loosened buildup away, never enough to drive water behind the siding or mark the surface.
We rinse the landscaping again, sweep and blow down walkways, and walk the exterior with fresh eyes before we leave.
Why Portland Homeowners Choose Us for House Washing
When you’re hiring someone to work on ladders and roof edges, trust matters. Here’s why Oregon City homeowners choose us for gutter guard installation.
Soft wash is our default, not our upsell
Some outfits own one pressure washer and use it on everything. We match the method to the surface: soft wash for siding and painted surfaces, true pressure washing for concrete.
The growth is killed, not just knocked off
Detergent does the work, so the green stays gone longer than a pressure-blast that leaves the organism alive.
Same-day online estimates
Google Earth measurement + your photos = an itemized emailed proposal, usually within hours. Soonest scheduling typically within 1–2 days.
Whole-exterior crews
Roof, gutters, siding, and concrete in one visit if you want it — one crew, one invoice.
Real, verifiable reputation
760+ five-star Google reviews at 5.0, Angie's List Super Service Award winner. Locally owned since 2015, and the team carries about 20 years of combined exterior-cleaning experience.
Monday – Saturday: 8:00am – 6:00pm
House Soft Washing Across the Portland Metro
We’re based at 650 NE Holladay St in Portland and clean roofs throughout the metro, including Beaverton, Gresham, Happy Valley, Lake Oswego, Milwaukie, Oregon City, Tigard, West Linn, Wilsonville, and Vancouver, WA, plus surrounding areas. Hours: Monday–Saturday, 8 AM–6 PM.
Portland House Washing Questions, Answered
Most homes run $500–$1,500 depending on size, stories, siding type, and buildup. You get a free itemized quote, usually same-day, from Google Earth and your photos.
Low-pressure washing that lets a biodegradable detergent do the work: it kills algae and mildew and breaks their bond with the surface, then a gentle rinse carries everything away. It cleans surfaces that high pressure would damage.
Siding, painted surfaces, and roofs: soft wash. Concrete driveways, walkways, and patios: pressure washing. Most full-exterior jobs use both, each on the right surface, and we do both in one visit.
We use environmentally friendly, biodegradable detergents, and we wet down and rinse landscaping before and after application as part of every job.
No, that’s the point of the method. The rinse pressure is comparable to a garden hose. What damages paint and siding is high-pressure washing, which we don’t use on homes.
Because the detergent kills the growth rather than just stripping it, results typically last well beyond a pressure-only clean. Shaded, tree-heavy walls regrow fastest; most homes do well on an annual or every-other-year schedule.
Once a year is the safe rhythm in Portland’s climate: buildup left longer can permanently stain or degrade paint and siding. Homes with lots of shade or vegetation may need it more often.
No, we need exterior access, a working spigot, closed windows, and cars away from the walls. We text you 30 minutes before arrival.
For any other questions, click below and contact of directly. We will happily answer any questions regarding our services. We also offer free consultations and free estimates.
Ready To Make A Change?
Get Your Free House Washing Estimate Today
Send your address and a couple of photos of your siding, and we’ll email an itemized quote: usually the same day, no site visit required. Free estimates, no obligation, satisfaction guaranteed.
Trusted by Portland Homeowners Like You
Offices
Head Office
PDX Roof Cleaning & Pressure Washing LLC
650 NE Holladay St Suite 1600
Portland, OR 97232
Gresham Office
2135 SW Towle AVE,
Gresham, OR 97080
Ready to Restore Your Home’s Curb Appeal?
If you’re tired of overflowing gutters or repeated cleanings, we’ll help you choose a guard that fits your roof edge, debris type, and budget, and then install it properly for Portland weather.
- Safe, Eco-Friendly Cleaning Methods
- Trained & Insured Professionals
- Competitive, upfront pricing
- Trusted locally in Portland Metro