With roughly 25,485 households and a median household income around $122,600, Chino Hills sits well above the $97,712 median for the wider service area we track. That tracks with the newer construction: later-build subdivisions generally came with better-insulated doors and heavier-gauge steel than the 1960s stock common elsewhere in our coverage, which runs across 704,814 households and 286,259 owner-occupied houses overall. Insulated steel sectional doors are the norm here, often with two or three horizontal panels and factory-installed weatherstripping that's held up reasonably well given the mild climate. Where we do see wear, it's usually on the moving parts rather than the door skin itself - springs, rollers, and the opener's drive mechanism all have a working life regardless of how good the door panel is.