Mold Removal in Happy Valley, OR: Newer Hillside Homes

The newest homes in the metro

The American Community Survey (2020 to 2024) counts 9,450 housing units in Happy Valley with a median build year of 2009. Of those, 6,765 were built in 2000 or later, 72 percent, and 8,011 in 1990 or later, 85 percent. Only about 760 homes predate 1970. Seventy percent are detached houses, and 21 percent of households rent. The census counted 4,519 residents in 2000 and 23,733 in 2020.

More rain on the hill

NOAA's 1991 to 2020 normals record 49.4 inches of precipitation a year at a volunteer station about 1.7 miles east-southeast of Happy Valley, at an elevation of roughly 590 feet. Portland International Airport records 36.9. The city climbs toward Mount Scott, an extinct volcano in the Boring Lava Field and, at 1,050 feet, the highest point in Happy Valley.

Hillside lots, retaining walls, and lower levels cut into a slope all raise drainage questions. The cities of Happy Valley, Lake Oswego, and Oregon City helped pay for the state's 2013 landslide study of northwestern Clackamas County, which DOGAMI describes as useful for regional screening rather than site-specific evaluation. See our gutters and drainage page.

When the builder may still be responsible

A defect in a young house often traces to the way it was built rather than to age: a flashing that was left out, a plumbing connection, a bath fan ducted into an attic. Oregon's statute on construction claims (ORS 12.135) generally requires a claim over residential construction to be filed within ten years after substantial completion, defined as the earliest of written acceptance, a certificate of occupancy, or the owner occupying the home. Forty-six percent of Happy Valley homes, 4,365, were built in 2010 or later, so many are still inside or close to that window.

Whether a given claim qualifies is for a construction-defect attorney to say. What helps in any case is a record made early: dated photographs, moisture readings, and a written scope showing the source of the water. See our mold inspection and testing page.

Where we serve in and around Happy Valley

We serve Scouters Mountain, the Rock Creek area, the Sunnyside Road corridor, Happy Valley Town Center, and the Mount Scott area, along with nearby Gresham, Milwaukie, and Oregon City.

How the work is planned for Happy Valley homes

Seventy-two percent of Happy Valley homes were built in 2000 or later, so inspections begin with how the house is built to shed and vent water: flashing, plumbing connections, exhaust ducts, and drainage at lower levels. Dated photographs and readings are part of each written finding, since a house under ten years old may still be inside Oregon's construction-defect window.

Happy Valley areas we serve

• Scouters Mountain
• Rock Creek area
• Sunnyside Road corridor
• Happy Valley Town Center
• Mount Scott area

Services for Happy Valley homes and buildings

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