Rio Vista is one of the newer pockets we work in. The median year built here is 2002, which is decades younger than the 1979 median across the rest of our coverage area. That matters more than it sounds like it should. A house built in 2002 came with a steel sectional door, a factory-installed opener with photo-eye sensors, and galvanized torsion hardware rated for a specific cycle count. It did not come with the one-piece slab doors or exposed extension springs you still find in the older river towns and the 1960s subdivisions closer to Antioch. With about 5,110 households in Rio Vista, this is a smaller market than the city proper, but it's a more uniform one - most of what we see here is late-model production-builder hardware, not a mix of eras.