This project involved a complex addition that added a guest suite and exercise room under an existing modern residence. A new opening from the main floor entry showcases an open and light-filled stairwell, leading to the new lower spaces. Large articulating Nanawall doors open the exercise room to the exterior, while the built-in beverage station allows for quick refreshments. The guest suite includes a luxury bath with walk-in steam shower. Additional details include finished concrete floors with radiant heat, custom steel railings, heat recovery ventilation, and exterior sauna.