Heidi Caillier tackled the design of this Seattle home that had mid-century bones with a few Colonial touches, but it lacked a clear identity. With little architectural detailing—and limited opportunities to add or modify it without significant cost—it needed another way to feel engaging and beautiful. She introduced contemporary shapes and patterns that complemented the existing structure, creating character without altering its framework. Adding detail to the walls, particularly in the kitchen with handmade custom tiles, was a trick she used to distract from the low ceilings. Brilliant! Photos: Haris Kenjar.