This backyard ADU and tiny matching tree house use some choice materials—”materials that I would love to have used on a number of projects,” says homeowner and architectural designer @grey_shaeffer, “but because of financial and other constraints, it wasn’t a possibility.” High-quality, tactile finishes give the interiors an organic yet pared-down feel. For the kitchen backsplash and counters, Grey applied unglazed stone tile from Japan. “It’s this really beautiful handmade tile, in an almost…
