Pressure Washing in Southwest Portland
Westview Services provides pressure washing in Southwest Portland, from $299, for neighborhoods including Multnomah, Hillsdale, Arnold Creek, Maplewood and Far Southwest. Southwest lots are hilly, wooded and creek-side, so moss and algae are the usual job: they are killed with a cleaning solution, and only the rinse uses pressure. The itemized written quote arrives 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.
How is pressure washing priced in Southwest Portland?
Before you ask for a number, it is worth reading how our pricing works.
Pressure washing in Southwest Portland starts at $299 and is priced by area, surface and access, so a steep driveway or a long shaded walkway is quoted on what it takes. A driveway is typically 1 to 2 hours on site, and the written quote holds for 30 days.
Typical hours on site, not prices:
- Driveway and concrete cleaning 1 to 2 hours
- Sidewalks, walkways and steps About 1 hour
- Patio, paver and walkway cleaning 1 to 3 hours
- House washing, two story 3 to 4 hours
- Moss on north-facing walls Longer dwell, same visit
- Roof moss treatment Quoted on pitch and access
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 does Southwest Portland grow more moss than the flats?
Shade and creeks. Arnold Creek has a tree canopy of nearly 70 percent, measured in 2019, Ashcreek-Crestwood is hilly and forested with creeks feeding Fanno Creek, and Hayhurst sits in the Fanno Creek watershed, so surfaces stay damp long after an open street has dried.
Southwest Hills rises to 1,073 feet at Council Crest. Portland gets roughly 44 inches of rain across about 155 days a year, and surfaces stay damp from October through May.
So the work here is mostly biological. A cleaning solution and dwell time kill moss and algae at the root. Turning the pressure up only etches concrete and drives water behind siding, and the growth returns within a season.
What a shaded Southwest lot needs, surface by surface
Hills and trees change the method more than the size of the house does.
| Surface | Method | Reason |
|---|---|---|
| Driveway on a sloped lot | Surface cleaner, 2,500 to 4,000 PSI | Sloped lots concentrate runoff onto driveways and lower walkways |
| Walkway and steps under fir | Treat, dwell, then rinse | Shade keeps steps damp, so growth returns there first |
| North-facing siding | Soft wash, longer dwell | North walls hold moss longest and usually set the cycle for the house |
| Cedar fence or deck | Low pressure after treatment | Force lifts the grain and takes the finish with it |
| Stone retaining wall | 800 to 1,500 PSI | Softer stone pits and loses its face |
| Roof moss | Treatment, no pressure washing | Pressure strips the granules that are the roof's UV protection |
Can pressure washing water go into a storm drain in Southwest Portland?
Only plain rinse water. Portland City Code 17.39.040 prohibits storm drain discharges with a visible sheen, a visible discoloration, a pH outside state standards or damaging heat, so moss treatment and degreaser runoff are collected on site, which matters more on a lot that drains toward Tryon Creek or Fanno Creek.
The section itself prohibits any discharge to the City storm sewer and drainage system that carries a visible sheen, a visible discoloration, a pH outside state water quality standards, or heat that could damage the system or warm the receiving water.
Next door to Lake Oswego
Arnold Creek borders the City of Lake Oswego, which is where Westview is based, so Southwest Portland is the closest part of the city to us. The same method is described on our Lake Oswego pressure washing page, and roof moss is covered under moss removal.
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.
Southwest Portland neighborhoods we cover
The City of Portland lists 20 neighborhoods in its Southwest section. These thirteen are the ones the city itself describes as Southwest Portland, from Hillsdale and Multnomah Village out to Far Southwest.
Arnold Creek
Ashcreek-Crestwood
Bridlemile
Far Southwest
Hillsdale
Homestead
Maplewood
Markham
Marshall Park
Multnomah
South Burlingame
Southwest Hills
West Portland Park
Every Portland property is quoted individually in writing before work begins. Westview also handles pressure washing across Portland, house washing in Portland, moss removal and roof cleaning.
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: City of Portland, neighborhood directory (neighborhood names and city sections), Portland City Code 17.39, Storm System Discharges (prohibited discharges, 17.39.040), Oregon Construction Contractors Board (who needs a license; verify our license).
Common questions
Yes. Both are in the City of Portland's Southwest section, and every property there is quoted in writing on its own surfaces.
Shade and nearby creeks keep the surface damp. If moss is blasted off rather than killed at the root with a cleaning solution, it regrows within a season.
From $299. Steep driveways and long shaded walkways are priced on area and access, and the quote holds for 30 days.
Yes, by treatment rather than pressure. Pressure on an asphalt roof strips the granules that protect it from UV.
Not for cleaning alone. The Oregon Construction Contractors Board lists power and pressure washing for the purpose of cleaning siding, sidewalks and similar surfaces among the work that does not require a license.
Construction work that improves real property generally does, so ask for a CCB number if a quote goes beyond cleaning.
No. An outside tap and room to walk the perimeter are all it takes, and photos of the result are sent afterward.
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