Across this service area there are roughly 12,293 households and about 8,493 owner-occupied houses, and the bulk of them were built in that 1967 to 2003 window, with 1988 sitting right in the middle. That is a long run of fairly consistent construction, which means a lot of these houses share the same garage dimensions, the same era of door track, and often the same brand of opener that was standard for builders at the time.
That consistency is genuinely useful on a service call. When we know a house comes from one of the seven named areas built up through the 80s and 90s, we already have a good guess at what waits in the garage before the door even goes up - which spring size, which track style, and whether the opener is old enough that parts are getting hard to source. It does not make every house identical, but it narrows the guesswork far faster than it would in a town with a scattered, mixed-age housing stock.
It also means winter works on these homes in similar ways. A door installed when the house was built in 1988 is well past thirty years old now, and the springs, cables, and rollers behind it have all aged on the same schedule, whether or not anyone has noticed the wear yet.