Castro Valley's median household income sits at $138,069, well under the wider service area's $193,633. That gap matters here more than in some of the towns we cover, because it tracks with something we see on the truck: owners holding onto an original door and opener years past when a house closer to the area median would have already swapped it out. A new install on a garage that's never had one before takes longer than a straight swap - old track has to come down, the header often needs new jamb brackets, and if the opener was hardwired in 1966 fashion, the electrical needs a look before anything gets hung. Budget most of a day when the garage has never seen an update. A straight door-for-door swap on a frame that's already square and modern runs faster, but Castro Valley's stock skews toward the first kind of job, not the second.