Arcadia's housing stock skews newer than a lot of the area we cover out of Pasadena. The median build year here lands around 1965, a good six years past the 1959 median across the wider service territory. That gap matters more than it sounds. A house built in 1965 usually came with an extension-spring door on a two-track system, sometimes already upgraded to an early torsion setup, rather than the flat one-piece slab doors you find in the pre-1950s pockets closer to Pasadena. Panel sizes changed too - sectional doors were becoming standard by the mid-60s, so you see more roll-up sectional units with roller tracks bolted to the jamb rather than the older strap-hinge doors. The service area overall still runs mostly pre-1960, so Arcadia is one of the newer pockets we work in, not the oldest. That doesn't mean nothing's original. Plenty of these doors and openers have been swapped once already since 1965, so what's on the house now is often a second- or third-generation replacement, not the factory unit.