Prospect Heights sits about 3 miles from our Arlington Heights shop, and the housing stock here centers on 1976, right in the middle of the broader 1938-2009 range we see across the service area. That median year matters more than people think. A house built in the mid-1970s almost always came with a steel sectional door on an extension spring system, not the torsion setups that got standard later on. Across the wider area we cover, 86 named communities share this same 1960s-70s base, and Prospect Heights fits that pattern closely rather than sitting at either edge of it. With 6,249 households in this specific area, there's a real, sizable cluster of these same-era doors aging out at roughly the same time, which is why the same handful of failures keeps showing up on our call sheet from this part of town. Median household income here runs $91,599, a bit under the wider service area's $109,454, which is worth mentioning because it shapes the repair-versus-replace conversation - more owners here are choosing to fix a working door instead of swapping it out.