• Credit: Asa Gilmore

Homes that blur the divide between interior and exterior let light in, increase the amount of livable square footage in a house, and make a house live bigger. The trend is nationwide—no longer limited to warm-weather places. Sliding window walls are one of the most popular ways to make an inside-outside room. So is a design strategy we’re seeing more of in multifamily dwellings: Reducing an apartment’s square footage and spending more money on bigger windows.