The average U.S. house size grew from 983 sq. ft in 1950 to 2.377 sq. ft. in 2010.
Source: Betsy Towner, aarp bulletin
My first home purchase was a new 3 BR single bathroom and single garage on a large lot. Total square footage was around 1,000 and it cost me $10,200 in 1961. My income was $550/month or $6600 per year so the house cost 1.55 times my annual income. In today’s dollars that purchase price would only be 6.39 x 10,200 or $65,178.