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House Washing, gentle on the finish

Whole-home soft wash — siding, soffits, fascia and trim.

What it is

House Washing — done properly

A full exterior soft wash for siding, soffits, fascia, trim and entryways. We lift the green algae film, pollen, spider webs and wasp nests that dull curb appeal — gentle on paint, caulk lines and window seals.

Olson Pro Wash technician soft-washing a two-story home, suds running down the siding
House Washing · Snohomish County, WA
Why it matters here

What house washing is up against in the Northwest

Green algae film

That dull green cast on north and east walls is airborne algae feeding on moisture. Pressure drives it into the substrate — soft washing dissolves it.

Every siding type

Vinyl, LP SmartSide, fiber cement, cedar and brick each want a different dilution and dwell time. We match the mix to your wall.

Lasts through the wet season

A soft wash kills the growth instead of blasting the surface, so siding stays clean four to six times longer than a pressure-only wash.

What's included

Every job, every time

  • Vinyl, LP SmartSide, fiber cement, brick, cedar
  • Gutter-face brightening available as an optional add-on
  • Window rinse on completion
  • Results that last 4–6× longer than pressure alone
How it works

Four steps, no surprises

01

Pre-wet & protect

Plants, light fixtures and outlets are covered and soaked; we close windows and note any open weep holes.

02

Low-pressure apply

A soft-wash detergent is applied bottom to top, lifting algae, pollen, cobwebs and wasp nests off siding, soffits and trim.

03

Agitate & dwell

Trim, corners and stubborn staining are hand-detailed while the solution does the work.

04

Rinse & window pass

Everything is rinsed top-down and the windows get a final rinse so you are not left with spots.

What it costs

Most single-story homes run $199–$400 and two-story homes $400–$700, based on square footage, stories and siding condition. Bundled with a roof wash for a lower combined rate.

Want it kept up automatically? Put it on a maintenance plan for a lower per-visit rate.

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House Washing FAQ

Before you book

Is soft washing safe for my plants?

Yes. We pre-wet and rinse all landscaping around the work area and use detergents at a controlled dilution. Plant protection is a standard part of every wash.

Will it get the green off the north side?

That is exactly what it is for. The green is algae, and the detergent kills it at the root rather than smearing it around the way pressure does.

Can you do just the gutter faces?

Gutter-face brightening is an optional add-on to a house wash — or we can do it alongside a roof or gutter cleaning.

Ready for house washing that actually lasts?

Free, itemized quotes across 18+ cities in Snohomish & King County. Most estimates back the same day.