We don't have a house-by-house age breakdown for every town on this list, so we won't pretend we do. What we do know, from Census data across the wider service area, is that housing here runs 1938 to 1998 with a median build year of 1962, and that most of the stock across the 33 named communities we cover dates to the 1960s and 70s. That's the baseline whether you're three miles out in Schlusser or seventeen miles out past Marysville.
What that means in practice: a lot of these towns got their housing boom in the same twenty-year stretch, so a lot of garages share the same bones - single-car openings from before double-wide became standard, sectional doors replacing older swing-outs sometime in the 70s or 80s, and torsion hardware that's now past its expected service life on houses that have never had the spring swapped once. Newer construction exists in pockets, but it's the exception, not the rule, out here.