7 Smart ADUs and Additions That Cost as Little as $18K

The couple finished the exterior siding with deep purple shingles made of Hardie board. "We wanted an exterior cladding that was durable, low-maintenance, and relatively DIY-friendly," says Michael. "When looking at our options at the local hardware store, the fish-scale shape popped because it was unique, quirky, and not super serious—and yet could create a contemporary look through uniformly using it with woven corners and minimal detailing."