The average size of a new build home can vary depending on the location and the housing market in that area. However, in the United States, the average size of a new single-family home has been increasing over the years. According to the National Association of Home Builders (NAHB), the average new single-family home built in 2020 was 2,306 square feet (214.23 square meters).
This is an increase from the average new home size in the early 2000s, which was around 2,000 square feet (185.80 square meters). However, it's worth noting that new homes in some regions, such as the Northeast, tend to be smaller than homes in other regions.
The size of a new build home can depend on several factors, including the local housing market, buyer preferences, and zoning regulations. In some areas, smaller homes may be more popular due to affordability or a desire for lower maintenance. In other areas, larger homes may be more popular due to a preference for more living space or a larger yard. Ultimately, the size of a new build home will depend on the needs and preferences of the buyer, as well as the available options from the builder.