The service area as a whole has homes built anywhere from 1938 to 2005, with a median around 1970. Norwalk skews older than that - the median build year here lands around 1957, which puts a lot of these houses more than a decade ahead of the area's typical home. That gap isn't trivia. A door and opener installed on a 1957 build has usually been replaced at least once, sometimes twice, and whatever's on the house now may or may not match the original rough opening or track style.
With roughly 26,801 households in this stretch, that's a lot of garages built to a mid-century standard that newer tract construction elsewhere in the area never used. Framing depths, header heights, and even the way the door track was anchored to the jamb were done differently in 1957 than they were by the 1970s or 1980s. When we get a call here, we're not assuming a modern 16x7 opening - we check.