Mold Removal in Milwaukie, OR: Johnson Creek and Mid-Century Homes

Seven in ten homes predate 1980

Milwaukie's 9,859 housing units have a median build year of 1968, according to the American Community Survey (2020 to 2024). Some 5,199 were built before 1970 and 1,129 before 1940, which is 11.5 percent of the total and the second-highest share among the cities we serve after Portland. Only 669 homes, under 7 percent, date to 2000 or later. Thirty-nine percent of households rent, and 68 percent of homes are detached houses.

Homes of that age fall under two rules worth knowing before any wall is opened. Federal law requires lead-safe work practices by certified contractors in housing built before 1978, and Oregon DEQ requires an accredited asbestos survey before demolition or renovation of residential buildings built before January 1, 2004.

Where Johnson Creek meets the Willamette

Johnson Creek enters the Willamette River in Milwaukie after about 24 miles and a 54-square-mile drainage basin that includes parts of Gresham and southeast Portland, according to the U.S. Geological Survey. In February 1996 the creek crested at 13.8 feet at the Sycamore gauge in southeast Portland, 2.8 feet over flood stage and less than a foot below the 14.7-foot record set in 1964.

The creek came back into the news in December 2025, when Clackamas County issued a be-ready evacuation notice for low-lying areas along Johnson Creek in the county and in Milwaukie. KPTV reported the flow rising from about five feet on a Wednesday to nearly eleven feet by Thursday evening. Flooding that arrives with a storm and leaves in days is a surface-water event. Floodwater that reaches a house is untreated, and the EPA advises drying wet areas within 24 to 48 hours, so speed matters. See our page on flood and sewage damage.

Crawl spaces that stay wet

For a house over a crawl space near the creek, the timing of the water says a great deal. A crawl space that is wet in the weeks after a storm and dry by late summer is usually dealing with seasonal groundwater or runoff, and a dry-season visit alone will miss it. Readings in both seasons show which one a house has. The U.S. Geological Survey found that southeast Portland, upstream on the same creek, stayed in groundwater flooding for months to years after the wet period of 1996 and 1997 (see the Portland page). Our crawl space and subfloor and gutters and drainage pages cover the usual repairs.

Seven neighborhood district associations

The city recognizes seven neighborhood district associations: Ardenwald-Johnson Creek, Hector Campbell, Historic Milwaukie, Island Station, Lake Road, Lewelling, and Linwood. Ardenwald-Johnson Creek is also recognized by the City of Portland. We also work in unincorporated Oak Grove and Jennings Lodge, just south, and in Lake Oswego.

How the work is planned for Milwaukie homes

Seventy-two percent of Milwaukie homes were built before 1980, so the lead-safe and asbestos-survey steps appear in the written scope from the start. Because creek and groundwater problems here follow the weather, the inspection records when water appears as well as where, which separates a drainage repair from a groundwater repair.

Milwaukie neighborhoods we serve

• Ardenwald-Johnson Creek
• Hector Campbell
• Historic Milwaukie
• Island Station
• Lake Road
• Lewelling
• Linwood

Services for Milwaukie homes and buildings

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