When designer Daria Sheina was presenting concepts for Sean and Chadd’s home away from home, she barely paused on a half-finished sketch of two playfully stacked and rotated cuboid volumes. It wasn’t developed enough, she thought. “But we were like, wait, wait, wait, what was that one?” says Chadd with a laugh. Sheina’s throwaway doodle ultimately set the direction for Sean and Chadd’s cabin on the island they had both known and loved for decades: an under-the-radar destination that’s only accessible by passenger ferry or private boat. “It was the most playful of the images,” Sean explains. “It had this stacked appearance, like a built structure up in a tree.” The remote location made prefabrication essential for the 1,063-square-foot design. “If it wasn’t prefab, that beautiful idea wouldn’t be possible,” Sheina explains. After spending months on virtual models to ensure every component was properly sized, all the pieces of the off-the-grid cabin were fabricated by bcpassivehouse and ...