Major homebuilders are prioritizing narrower houses with fewer doors, windows and cabinets. Median homes sizes are at a 13-year low.

The new American home is shrinking.

After years of prioritizing large homes, the nation’s biggest and most powerful home builders are finally building more smaller ones, driving a shift toward more affordable housing.

The boom in smaller construction has cut median new-home sizes by 4 percent in the past year, to 2,179 square feet, census data shows, the lowest reading since 2010. That’s helped bring down overall costs and contributed to a 6 percent dip in new-home prices in the same period.

Townhouses, in particular, are increasingly popular, accounting for 1 in 5 new homes under construction at the end of 2023, a record high, according to an analysis of census data by the National Association of Home Builders. To cut costs, companies are building smaller and taller, with fewer windows, cabinets and doors.