Milwaukie was founded in 1847 on the Willamette River and incorporated as a town in 1903, and it has been electrically connected for a long time. Back in 1892 an electric interurban streetcar line ran through Milwaukie to link Oregon City with Portland, and today the MAX Orange Line reaches the city. That history shows up in the housing: older neighborhoods such as Historic Milwaukie and Island Station include many early-20th-century homes, a large postwar band built through the 1950s, 60s, and 70s, and newer infill added later. Because the median build year lands around 1967, most homes we see fall into that mid-century band.
That era overlaps the windows when two problem panel brands were commonly installed. Federal Pacific (Stab-Lok) panels were installed in homes built or upgraded between the 1950s and 1990s, and independent testing in the 1980s found they could fail to trip under overload. Zinsco panels were popular in the late 1960s and 1970s and carry their own documented failure risks. Both windows overlap Milwaukie's median build year, and both are increasingly cited by insurers as a reason to non-renew a policy. We don't have a count of how many are in Milwaukie specifically, so we won't pretend to, but they are common in homes of this era. The older, pre-1950 homes bring a different concern: knob-and-tube was the standard wiring method in the cottages and early Craftsman homes found in Historic Milwaukie and Island Station. It has no ground, doesn't tolerate modern insulation packed around it, and insurers and lenders often flag it.
A Milwaukie-specific permitting detail trips up handymen and out-of-town crews. Milwaukie runs its own municipal Building Department and issues the building permits, but the City states plainly that it contracts with Clackamas County to perform electrical plan reviews and inspections. So the electrical is not handled by the State Building Codes Division here. The permit is pulled through the City and Oregon's ePermitting system, and a Clackamas County electrical inspector performs the inspection. By state law the electrical work can't legally begin until that permit is issued.