Most of what we install in Chicopee itself goes into openings built to 1960s and 70s standards, but Southwick's housing stock runs newer, with a median build year around 1981. That later construction usually means squarer, more standardized rough openings and factory-set headers, which cuts down the shimming and bracket improvising that older openings demand. A straight swap on a standard 16x7 double door, no header rebuild needed, usually runs a half day. Add a header modification, a new electrical run for the opener, or a non-standard width, and you're into a full day. We won't quote a firm number until we've measured the opening in person, because a house built in 1981 can still have had an addition or a garage conversion that throws the numbers off.