Brentwood runs about 20,918 households, which is a meaningful chunk of the roughly 136,783 households across the wider area we cover out of Antioch. That size matters because it means a steady, predictable run of installs rather than a handful of one-offs - builder-grade doors going in during the same few years tend to fail in the same few years.
Across the service area as a whole, housing spans 1950 to 2008 with a median build year of 1979. Brentwood sits well past that median, with a lot of its stock going up closer to 2003. That's a newer door than what you'll find in the older pockets we work in, but it's also a door that's now 20-plus years old - right at the point where the original opener motor is tired, the factory springs are past their rated cycle count, and the panels (usually steel, often a lighter gauge than what gets installed today) are showing dents and rust at the bottom section. A new install here usually isn't a repair that got out of hand. It's a builder door reaching the end of what it was built for.