At seven feet wide and approximately 25 feet deep, the tiny bright blue home at 523 Queen Street in Old Town Alexandria, Virginia is the narrowest house in America. With just 325 square feet between its two stories, the historic Hollensbury Spite House may look cute, but its origins are anything but sweet.Click to see full answer. People also ask, what is the smallest house in the world?As Becky Ferreira reports for Motherboard, nanorobotics researchers at the Femto-ST Institute in Besançon, France have built a house that measures just 20 micrometers long, making it the smallest house in the world.Subsequently, question is, where is the Spite House located? The Spite House (in blue), built in 1830, is 7 feet wide, about 25 feet deep and a whopping 325 square feet in two stories. It is located on Queen Street in the Old Town district in Alexandria, Va., just across the Potomac from Washington. Herein, what square footage is considered a small house? Today, in a society where homes often have well over 3,000 square feet, the definition of “small house” has changed. Now, a small house is often considered anything with 2,500 square feet or less, which is right about average for the size of homes. Some even consider anything less than 3,000 square feet “small.”What is the average size home in America?Over the last 42 years, the average new US house has increased in size by more than 1,000 square feet, from an average size of 1,660 square feet in 1973 (earliest year available from the Census Bureau) to 2,687 square feet last year.