The wider service area covers 48 named communities with stock from the same 1960s-70s wave, and that consistency matters for parts. A torsion spring sized for a house built in 1964 is a different animal from one built in 1995, and knowing which era we're dealing with before the truck rolls saves a second trip. We work Azusa itself along with nearby Duarte, Vincent, and Bradbury, each about 3 miles out, and Irwindale, Covina, Glendora, and Monrovia within about 4 miles.
Across the broader region there are roughly 200,019 owner-occupied houses out of 449,133 households, which tells you this is mostly a homeowner market, not rental turnover - people who want a door fixed right because they're not moving next year. Median household income across the area runs around $100,558, which is part of why we see more replacement-grade requests than quick patch jobs: owners here in the San Gabriel Valley tend to want the repair done once.