Complex sentence: Windsor Hills underwent development in the late 1930s by the Marlow Burns Company; aimed at the high upper class neighborhood akin to Bel-Air, Beverly Glen, it was the first subdivision in Southern California for which the newly created Federal Housing Administration provided mortgage insurance.
Split into simpler sentences: Windsor Hills underwent development in the late 1930s by the Marlow Burns Company; aimed at the high upper class neighborhood akin to the style of Bel-Air and Beverly Glen. It was the first subdivision in Southern California for which the newly created Federal Housing Administration provided mortgage insurance.