Bryan Cranston and his wife, Robin Dearden, relax on a Lagune sofa by Roche Bobois. The couple’s home occupies a beachfront site that they’ve owned for several years. The original structure, affectionately dubbed the “love shack” was born as 1940s-era military housing that in subsequent decades became an uneven hodgepodge that defied local permits and was slowly sinking into the sand.