Altadena's houses skew older than most of what we see across the wider service area. The median build year here runs around 1945, a good fourteen years ahead of the service-area median of 1959. That gap matters more than it sounds like it should. A house built in the mid-40s was framed before garage doors were standard equipment on most tract homes - a lot of these garages got retrofitted doors and openers decades after the house went up, on whatever hardware was common at the time of the retrofit, not at the time of construction. You'll find older single-panel doors, narrower jamb clearances, and header framing that wasn't built with a modern torsion spring assembly in mind. Across the broader 65-area footprint we cover, pre-1960 stock is common, but Altadena sits at the early end of that range, not the middle. That's the detail that should shape any quote before a truck even shows up - measuring a 1945 opening isn't the same job as measuring a 1975 one, and pricing or parts assumptions built around the newer end of the range don't hold here.