Most of the houses we work on around Council Bluffs went up between 1938 and 1980, with the median build year landing around 1972. That means the bulk of the garage doors we see are either original units from that run or a first-generation replacement installed sometime in the 80s or 90s. The housing stock skews 1960s and 70s across the seven areas we cover out from town, which puts a lot of single-car and narrow double openings on the road, along with the extension-spring setups that were standard before torsion systems took over.
The closer towns - Carter Lake, five miles out, and Crescent, nine miles - sit on roughly the same timeline as the Council Bluffs core. Head further out to McClelland, Treynor, and Underwood, and you start seeing more scattered build years, since rural lots filled in slower than the in-town blocks. Glenwood and Neola, the farthest stops we make, carry some older farmhouse garages alongside newer construction, so the fault patterns are less uniform. An opener installed in a 1972 house and one installed in a 2005 addition on the same street fail in different ways, and that's the split we plan a truck around.