Between two of the most beautiful towns on the California coast, Carmel-by-the-Sea and Big Sur, there’s a hidden valley: 31 square miles shared by just 300 families, each of whom owns a small parcel and the right to build. San Francisco architect Eric Haesloop discovered the preserve through his clients Bob and Allyson Kavner, who own five acres there. The Kavner house is a California take on the classic Adirondack style of upstate New York. The main house is used every weekend and the cabins fill up at family gatherings.