We work jobs across the wider service area, not just the immediate zip code. That stretches from Sunol and Camino Tassajara at roughly 10 miles out, to Blackhawk and Mountain House around 12 to 13 miles, Norris Canyon and Byron a bit further, and on out to Diablo, Union City, Fairview, Castro Valley, Brentwood, Discovery Bay, Alamo, Cherryland, Milpitas, Newark, Ashland, Clayton, and Knightsen, the furthest of these around 20 miles.
Across that area you've got roughly 148,749 households and about 78,437 owner-occupied houses - a mix old enough that door hardware varies a lot house to house, even on the same street. The climate here runs mild temperate most of the year, so we don't see the extreme cold-snap spring failures some regions deal with, but panels and seals still take a beating from sun and dust over a few decades.
If you're near the far end of that range, say Discovery Bay or Knightsen, mention that when you call so we can plan the dispatch. We're not going to pretend distance doesn't factor into scheduling.