German artist and designer Valentin Loellmann converted a listed stable house into a characterful, hand-built home for his family. At first, the house, located on the Meuse river in the Dutch town of Maastricht, didn’t have much of a garden: “just one high wall and a field behind,” he says. “We dogged out the ground to create different levels. One for the covered terrace, one for the pool, one stone patio, and one, the topmost, for a grass field.” He planted a large willow tree (“a natural curtain for the upper bedroom”), wisteria vines, and a mimosa tree, and he hand-built a concrete pool. “All to create a more Mediterranean feel,” he says. Here’s a look at the result.