We gave interior designers Darren Jett, Noz Nozawa, and Xavier Donnelly a photo of the same empty bedroom for a young professional—and then asked each of them to renovate it in their particular style.

"I loved the concrete floors, 13-foot-high ceilings … and that it was a pretty neutral canvas to work with," the renter says. Cindi says the artwork "adds some more personality and flair to a very ...