Most of the houses we work on went up between 1938 and 1994, with the bulk of the stock dating to the 1960s and '70s. That holds true across the 37 named areas we draw jobs from, from Parkville and McSherrystown just a couple miles out, to Berwick, Oxford, and New Oxford, and farther out toward Gettysburg, Dover, and Shrewsbury. If your house was built in that window, there is a decent chance your garage door and opener are original or close to it, or they have been swapped once with whatever was cheapest at the time.
We see a lot of single-car bays on older torsion setups, and a lot of two-car doors that got widened or replaced without anyone updating the spring size to match. That mismatch is one of the more common things we find when we open up a job, a door that technically works but is wearing itself out fighting hardware that was never sized for it. Knowing the housing era matters because it tells us what we are probably walking into before we even open the truck.