The median home in Marlborough was built around 1971, which is a touch newer than the 1968 median across the wider service area but still lands squarely in that postwar-to-70s construction wave covered under F1 and F2. With 16,649 households in town, that's a lot of garages built to the building and hardware standards of the early 1970s - a period when extension springs on two-piece track were still common before torsion setups became the norm. Median household income here runs $95,047, noticeably below the $141,440 median across the broader 422,524-household service area, which shapes the kind of repair-versus-replace conversation we end up having more often in Marlborough than in some of the wealthier towns on our route.