Drive through Westville, East Rock, or the Hill and most of the garages you pass went up somewhere between 1954 and 1986, with the median year sitting around 1972. That holds across the 41 named areas we reach from New Haven, from Downtown out through Quinnipiac Meadows and West Rock to the ring towns - West Haven and East Haven four miles out, Woodbridge, Orange, Hamden, and North Haven six, Branford a little past that.
It is mostly the same construction era repeated block after block: single-car and two-car attached garages, torsion springs mounted the way builders did it then, and openers swapped once or twice since the house was built. Because the housing stock repeats, we see the same handful of failure patterns over and over, and when a door looks unusual it is usually a previous owner's modification rather than the original build.
That sameness is the reason we travel to every town on our list from one New Haven base rather than staffing a branch in each one. A door in Hamden and a door in West Haven are usually from the same build wave, so the parts and the fix carry over, and the only real variable is the drive time we quote you honestly up front.