average room size square feet
Full Answer. In homes that were smaller than 2,000 square feet, the average living room size was 256 square feet. The average living room size for homes between 2,000 and 2,999 square feet was 319 square feet. For homes that were 3,000 square feet or more, the average living room size was 393 square feet. In smaller homes, living rooms took up a higher percentage of the overall home than in larger homes.