Whether he’s developing a stool whose crossbar doubles as a footrest or a cell phone made from one seamless piece of metal, product designer Scott Croyle helps create objects that reflect clever design thinking. For Croyle, who currently works for a start-up and formerly was head of design and user experience for the mobile device maker HTC, such an approach involves three criteria: "simplicity, craftsmanship, and something harder to pin down: beauty through emotion," he says. Croyle kept these qualities in mind when he revamped the 1930s fixer-upper in San Francisco’s Glen Park neighborhood that he shares with his wife, Michele Godwin, a teacher who’s working on a master’s degree, and their nine-year-old son. Croyle found San Francisco–based architect Cary Bernstein through Dwell’s Design Source database and worked with her for three years, sharing ideas and refining concepts for the house. The two began by debating whether to move a wall, but grander conversations ensued, and the project became, in Croyle’s words, the ultimate example of scope creep as the parameters of the renovation became more ambitious. The result is an 1,800-square-foot residence that, through the ingenious use of natural materials and space-saving design, feels expansive. Croyle and Bernstein walk us through the design process and end product.