Hey, Canoutchie, you may be on to something, here. ``Housing trends thru Sitcoms.` Let`s have a look.  
``Condo`` series:
Family Affair: 1st season, 1966
Laverne and Shirley: 1st season: 1976
One Day at a Time: 1977
Different Strokes: 1st season: 1978

`Detached Single Family home`` series
Ozzie and Harriet: 1st season: 1952
Father Knows Best: 1st season: 1954
Leave It To Beaver: 1st season: 1957
My Three Sons: 1st season: 1960

Wow.  TV as a reflection of the erosion of suburbia...