Location: San Juan Island, Washington. Photography: Dwight Eschliman & Benjamin Benschneider. From the architects’ website: The owner’s affection for a stone outcropping on her property inspired the design of this house. Conceived as a retreat nestled into the rock, the Pierre (the French word for stone) celebrates the materiality of the site. From certain angles, the house—with its rough materials, encompassing stone, green roof, and surrounding foliage—almost disappears into nature. With the exception of a separate guest suite, the house functions on one main level, with an open-plan kitchen, dining, and living space. A wood-clad storage box (made with siding reclaimed from a Lionel Pries–designed house) transitions from outside to…