Most of the homes we work on went up between 1955 and 1984, with the median build year sitting around 1968. That holds across the sixteen named areas in this part of the service territory - Glenbrook-Belltown, Springdale, the Cove and East Side near Shippan, North Stamford, Westover, and Turn of River all share the same ranch and split-level pattern, with garages built in as part of the original plan rather than tacked on later.
Closer in, Cos Cob at three miles, Riverside and Old Greenwich at four, and Downtown skew slightly newer but still fall mostly in that 1960s-70s band. It matters because the hardware installed in 1968 is not what is sold today - torsion sizing, track width, and panel gauge all changed more than once in between. If your house went up in that window, odds are good we have already seen its door on another street nearby.