The American house is growing. These days, the average new home encompasses 2,500 square feet, about 50 percent more area than the average house in the late 1970s, according to Census data. Compared to the typical house of 40 years ago, today’s likely has another bathroom and an extra bedroom, making it about the same size as the Brady Bunch house, which famously fit two families.

This expansion has come at a cost: the American lawn.

The first diagram shows what the average house looked like in 1978, when it measured 1,650 square feet and sat on 0.22 acres. The second shows its counterpart from 2015.