In the 1940s and ‘50s the map was mostly light blue, indicating that the vast majority of the metro area’s developed footprint was producing new housing at a meaningful pace, mostly but not exclusively in the form of single-family homes.
Although a number of areas show up in orange, implying a local abundance of moderately sized multifamily structures, only a tiny fraction show up in red, and even fewer show up in dark blue.

This image is embedded in ...