According to House Plans, three-bedroom homes in the United States have a wide range of sizes, from 976 square feet to over 2,600 square feet. The average three-bedroom, two-bath American home today is 1,200 to 1,400 square feet, well below the 2009 average home size of 2,164 square feet.
Overall, average home sizes are much smaller in Hong Kong, China and Russia than they are in the United States, Australia and Canada. How big a homeowner thinks his home is often depends on how the real estate market defines "bedrooms." In some locales, a room cannot be classified as a bedroom unless it has at least one window, a closet, and its own door.