With around 32,586 households in the area and a median income near $98,570, West Covina is a city of established single-family tracts rather than new builds. A median build year of 1968 means the bulk of the garage stock predates almost every modern safety feature we now consider standard - photo-eye sensors, auto-reverse, even consistent spring sizing from one house to the next on the same street. Builders in that era used whatever hardware was regional and cheap, so two houses built the same year by the same builder can still have different spring specs. That's worth knowing before anyone quotes you a spring replacement over the phone without seeing the door. It also means a fair number of these doors have already had one opener swap and maybe one spring replacement somewhere in their life, which complicates diagnosis - the door's history isn't always what the age of the house would suggest.