In 2018, Pau Munar and Victoria Rodriguez bought a 5,000-square-foot plot near the beach in Son Serra de Marina, a quiet town on the Mediterranean island of Mallorca. Pau, who cofounded local architecture practice Munarq, designed a luminous base there for weekend surfing excursions for the couple. The home, dubbed Son Serra, is clad in marés, a local sandstone, with traditional lime cement grout.