Pressure Washing in Lake Oswego, OR

Hard surfaces at homes and businesses across Lake Oswego get pressure washed by our crews, who head out from the Portland / Tigard office. That covers driveways, walkways, patios and similar flatwork. Lake Oswego is an incorporated city, listed in the Oregon Blue Book with an incorporation date of January 15, 1910, and the Census Bureau gives its land area as 10.872 square miles.

Call (503) 255-2532 for a free on-site estimate.

If your house is on Lake Oswego’s Landmark List

The City keeps a Landmark List, and its Planning page says the list “currently includes 72 properties located throughout the City.” The City’s Landmark Homeowner’s Guide, a four-page PDF created April 28, 2022, names “Sandblasting, pressure grit washing, or high pressure water washing of masonry and building surfaces” among the “Alterations which are typically denied.” The Planning page adds that designation “only governs the exterior of the structure.” Whether a particular property is on the list is the City’s to say.

The City’s Community Development Code has a historic preservation section, LOC 50.06.009, and in the copy the Internet Archive saved in August 2023 its criteria for alterations call for surface cleaning of structures to be done “using the gentlest means possible,” where cleaning is appropriate. The same criteria say that “Chemical or physical treatments, such as sandblasting, that cause damage to historic materials shall not be used.” The section is silent on pressure washing itself.

Those are the City’s words about landmark properties, and they endorse no company, ours included.

Mountain Park’s home maintenance standards

The City’s Historic Resources Advisory Board, in a release the Lake Oswego Review quoted on May 6, 2026, says Mountain Park has 2,735 homes on 600 acres and was annexed in 1968. The Mountain Park Homeowners Association has its own Standards for Home Maintenance, and in the edition dated April 1, 2020, one line reads “Driveways must be clean and free of weeds, accumulated leaf debris, and moss and algae.” A line in another section reads “The operation of power equipment, such as leaf blowers, lawn mowers, and power washers, is not permitted before 9 am or after 8 pm daily.” For the moss-and-algae standard on dwellings, the same document says a violation must be remedied within 45 days after the Notice of Violation.

The association’s covenants, conditions and restrictions, in the copy the Internet Archive saved in September 2024, are silent on washing. The April 2020 edition is the newest one we could read, so it is the one quoted here, and anything newer is the association’s to say. These are Mountain Park’s standards for Mountain Park, and other neighborhoods write their own.

Green on the walkway

Oregon State University’s Solve Pest Problems page on moss, updated May 28, 2026, describes algae on “walls, sidewalks, and patios in shady locations.” It adds “Algae on walkways is a slipping hazard.” That is Oregon State University’s general guidance for the Pacific Northwest. It is not a Lake Oswego rule, and it names no company.

What the Census counts in Lake Oswego

The Census Bureau’s 2024 five-year estimates put Lake Oswego at 18,140 housing units. Of those, an estimated 11,082 are detached one-unit homes (61.1 percent), 1,413 are attached one-unit homes (7.8 percent), and 4,342 sit in buildings of five or more units (23.9 percent). The remaining 1,303 (7.2 percent) are in two-to-four-unit buildings or are mobile homes. Owner occupancy covers 11,685 of the 16,873 occupied units (69.3 percent), and the median year built is 1982. Those are counts of housing units. They say nothing about what any driveway or patio is made of.

What the job involves

Where we work in Lake Oswego

We pressure wash throughout Lake Oswego. House exteriors get a soft wash instead, stucco included.

Lake Oswego pressure washing questions