Severna Park's median household income, at $168,091, runs well above the $110,051 median for the broader service area we cover from Columbia. That gap matters for this job specifically: higher-income areas built in the same window tend to have larger two-car and side-by-side door openings, heavier insulated panels already in place from a prior remodel, and owners who want a specific look - carriage-style overlay, windows, a matched paint color - rather than the builder-grade steel door that shipped with the house. It changes the quote, not the mechanics. The mechanics still come down to the same thing: a door built around 1978, on hardware sized for that era, sitting in a climate zone rated cold-severe, which shortens the working life of the original springs and seals regardless of the house's price point.