Pressure Washing in Lake Oswego, Oregon
Westview Services provides pressure washing in Lake Oswego, Oregon, across ZIP codes 97034 and 97035, from $299. Pressure is set per surface rather than per job: poured concrete takes 2,500 to 4,000 PSI with a surface cleaner, stamped concrete 1,200 to 2,000, natural stone 800 to 1,500, and siding is soft washed under 500 PSI instead. Send the address and an itemized written quote comes back within 24 hours.
- Itemized written quote within 24 hours
- Valid 30 days, no obligation
- We reply by email, we do not cold-call
- Projects start at $299
Request written pricing
Describe the property and what needs cleaning. Your itemized quote comes back by email within 24 hours.
Itemized written quote within 24 hours, valid 30 days. No obligation, and no sales call. Prefer the full form? Open our quote page.
Pressure Washing pricing in Lake Oswego
Before you ask for a number, it is worth reading how our pricing works.
Pressure washing in Lake Oswego starts at $299. Driveways, patios and walkways are priced by area and surface, and houses by square footage and stories. Here is what we do, and roughly how long each takes.
- Driveway and concrete cleaning 1 to 2 hours
- Sidewalks and walkways About 1 hour
- Patio cleaning 1 to 2 hours
- House washing, single story 2 to 3 hours
- House washing, two story 3 to 4 hours
- Deck cleaning 2 to 3 hours
- Fence cleaning 2 to 3 hours
- Complete exterior package 1 to 2 days
Every quote is written and itemized before work begins, and the price on the quote is the price on the invoice. Send the address through the form and the itemized number comes back within 24 hours.
Why Lake Oswego concrete gets dirty faster than flat-lot concrete
Lake Oswego sits under heavy Douglas fir and big leaf maple canopy, built across hills and around a lake. The metro takes roughly 44 inches of rain across about 155 days a year, and surfaces stay damp from October through May.
Sloped lots are the other half of it. Runoff concentrates on driveways and lower walkways, so concrete on a hillside lot needs cleaning more often than the same slab on flat ground. Under dense canopy the staining goes deep, and it comes out with a surface cleaner rather than with more pressure.
Algae on concrete is also a slip hazard well before it looks bad enough to notice. A shaded walkway that is slick in November was usually green in September. Driveways benefit from annual cleaning here, and shaded walkways often more.
What pressure each surface gets
The most expensive mistake in this trade is using one pressure setting across a whole property. This is the setting each common Lake Oswego surface gets, and why.
| Surface | Pressure | Why that number |
|---|---|---|
| Poured concrete driveway | 2,500 to 4,000 PSI | Correct for concrete, sound brick and stone |
| Stamped or decorative concrete | 1,200 to 2,000 PSI | Full pressure removes the sealer and dulls the color |
| Pavers | 1,500 to 2,500 PSI | Cleaning removes the joint sand, which is replaced afterward |
| Natural stone | 800 to 1,500 PSI | Stone is softer than concrete |
| Historic brick with lime mortar | Under 800 PSI | Mortar condition is assessed before any work begins |
| Vinyl, fiber cement, stucco, cedar | Soft wash, under 500 PSI | High pressure forces water behind panels |
| Composition or cedar roof | Chemical treatment, rinse under 100 PSI | Pressure strips the granules that protect the shingle |
Where does pressure washing water go in Lake Oswego?
A driveway usually drains toward the street, and Lake Oswego Code 38.26.920 prohibits dumping pollutants into the city's surface water drainage system. Clean rinse water is the simple case. Degreaser, detergent and moss treatment are collected on site rather than sent down the curb, and the written quote states that.
Lakefront property has a second rulebook. The Lake Oswego Corporation's Rules and Regulations Handbook lists patios, decks, boat docks, boathouses and sea walls among the Facilities that need its permit, and makes the permit holder responsible for keeping paints, stains, sealers, solvents, fuels and oils out of the lake. Cleaning a patio is not building one, but the logic carries over: anything that comes off a lakeside surface has a short trip to the water.
The city's 2010 stormwater management plan also describes yearly dry-weather inspections for illicit discharges, typically between July and September. That is the same stretch when flatwork is worth cleaning, so where the water goes is settled before the machine starts.
When is the best time to pressure wash in Lake Oswego?
Late May through September is the best window for pressure washing in Lake Oswego, because concrete has to dry for a treatment to bond. The Portland metro averages about 44 inches of rain over roughly 155 days a year, and outdoor surfaces seldom dry out between October and May.
| Surface | Best time | Why |
|---|---|---|
| Driveways, patios and walkways | Late May to September | The surface dries and a treatment bonds |
| Siding soft wash | July and August | Longest-lasting result before the wet season |
| Slick path or steps | Whenever it is slick | A safety fix, shorter lived in the wet months |
Algae and moss grow through that wet half of the year. A clean in March resets the clock at the start of the growing season, while a summer clean dries hard before the rain returns. A slick path in November is still a safety problem worth clearing whenever it happens. It is a short-term fix, because the surface goes straight back into eight damp months.
Pricing does not change with the season. Work starts at $299 in any month, and the written quote is valid for 30 days. The month-by-month calendar for exterior cleaning in Oregon covers windows and gutters as well.
What is the difference between pressure washing and power washing?
Power washing heats the water and pressure washing does not. Both use high-pressure water, typically 2,500 to 4,000 PSI on concrete, so the force does the cleaning. For moss and algae on siding neither is the right tool: soft washing under 500 PSI with a cleaning solution kills growth at the root while the water only rinses.
Heat earns its place on grease, on a food service pad or a drive-through, and almost nowhere else on a house. The quote lists the method next to each surface, so you can see which ones get pressure and which get soft washed. The pressure washing and power washing comparison goes surface by surface.
Ask any Lake Oswego pressure washing company one question
What pressure will you use on each surface, and why that number? Vague answers mean the setting has not been decided. A generalist with one setting leaves you a clean driveway and damage that surfaces months later.
Pressure washing uses high-pressure water, typically 2,500 to 4,000 PSI, so the force itself does the cleaning. That is correct for concrete, sound brick and stone, and for little else. Everything with a finish, a coating or a seam gets soft washed as part of a house wash instead, and a roof gets a low-pressure roof treatment.
How booking pressure washing works
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Send the address
Two minutes on the form, no phone call, and nobody walks your property before you have a number.
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Get the written quote within 24 hours
Itemized by surface, with the method for each, valid for 30 days.
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Approve it, then we schedule
Nothing is booked until you say yes in writing, and standard residential work needs no deposit.
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The quote is the invoice
Chris does the work himself. Payment is due on completion, and if any surface is not cleaned to your standard he returns within seven days at no cost.
Pressure Washing across Lake Oswego neighborhoods
Palisades and Hallinan Heights
South of the lake, hilly, heavy tree cover. Sloped lots concentrate runoff onto driveways and lower walkways, which need concrete cleaning more often than flat-lot properties.
Oak Creek, Skylands and Holly Orchard
Established residential with dense canopy and older concrete. Deep organic staining on driveways is typical and comes out with a surface cleaner rather than more pressure.
McVey-South Shore and Glenmorrie
Larger private lots, long driveways and significant hardscape. Access and drive length move the quote more than square footage does.
Blue Heron, Lakewood and Evergreen
Near the water, ambient humidity keeps surfaces damp after inland lots dry out, and algae returns fastest here.
Bryant, Childs and Rosewood
Larger lots with outbuildings, fencing and detached garages, the surfaces that get forgotten until the house is clean and they are not.
Westlake and Westridge
Newer construction with more vinyl and fiber cement siding, which means soft washing under 500 PSI on the house and pressure only on the flatwork.
We serve Lake Oswego ZIP codes 97034 and 97035 at the same rate in every neighborhood, with no travel surcharge anywhere in the city. Westview also handles house washing in Lake Oswego, concrete and driveway cleaning, deck cleaning, window cleaning in Lake Oswego and the full exterior package. Across the city line, see pressure washing in West Linn and pressure washing in Tualatin.
Westview Services is owner-operated from Lake Oswego, founded in 2022 and run by Chris, and the business is insured. The main site sets out the whole service range.
Pricing and local data reviewed . Sources: NOAA National Weather Service, Portland (climate normals), City of Lake Oswego Stormwater Management Plan (2010) (Lake Oswego Code Article 38.26 on illicit discharges), Lake Oswego Corporation, Rules and Regulations Handbook (Facilities, updated April 29, 2025), Trex decking care and cleaning guide (composite pressure limits), Oregon Construction Contractors Board (who needs a license; verify our license), CertainTeed, how to clean vinyl siding (power washing and moisture intrusion).
Common questions
Projects start at $299, and every property is quoted individually by area, surface and access.
A short driveway on a flat lot is at the bottom of the range. A long driveway with stamped sections, a paver patio and stone steps is three different settings on one property. Send the address and an itemized written quote comes back within 24 hours, valid 30 days.
Not at the right setting. Poured concrete handles 2,500 to 4,000 PSI with a surface cleaner. Stamped or decorative concrete needs 1,200 to 2,000 PSI, because full pressure removes the sealer and dulls the color.
Pavers clean at 1,500 to 2,500 PSI, and the joint sand has to be replaced afterward. Natural stone runs at 800 to 1,500 PSI.
No. Vinyl, fiber cement, stucco, cedar and painted wood all need soft washing under 500 PSI with cleaning solution rather than high-pressure water.
High pressure forces water behind vinyl panels, and on cedar it raises the grain and strips the finish.
Driveways benefit from annual cleaning here. Shaded walkways and lower driveways on sloped lots often need it sooner, because runoff concentrates there and algae makes them slick before they look dirty.
A house is priced by square footage and stories rather than from a chart, with a $299 floor on every job.
A single-story house wash takes 2 to 3 hours and a two-story 3 to 4, and a second story adds more than the extra area alone suggests because ladder work slows every elevation. Siding is soft washed, not pressure washed. The itemized written quote comes back within 24 hours.
Not a cedar or wood deck. Pressure raises the grain and strips the finish, so wood decks are soft washed under 500 PSI.
Composite depends on the maker. Current Trex Transcend, Enhance and Select boards allow up to 3,100 PSI with a fan tip no closer than 8 inches, and early Trex lines allow no pressure washing at all. See deck cleaning in Lake Oswego.
Not for cleaning alone. The Oregon Construction Contractors Board lists power and pressure washing for the purpose of cleaning siding, sidewalks and similar surfaces, and gutter cleaning, among work that does not require a license.
Oregon law generally requires a license for construction work that improves real property, so ask for a CCB number if a quote goes beyond cleaning.
No. We need access to an outdoor tap and a clear path to the surfaces, and most jobs are completed without the owner present.
You get before and after photographs either way.
If any surface is not cleaned to your standard, Chris returns within seven days and makes it right at no cost.
Get your pressure washing quote in writing
Send the address and what needs cleaning. Itemized pricing comes back by email within 24 hours, valid 30 days, no obligation.
Request my written quote Use the form on this page