Rubicon Gym
Phoenix, Arizona
4Line Studio designed this detached gym and casita as a private wellness retreat, grounded in natural stone, board-formed concrete, exposed steel, and wood slat ceilings. The program goes well beyond a home gym, with a professional-grade fitness space, recovery lounge, infrared sauna, steam shower, and cold plunge, plus a casita suite for guests or trainers. Expansive glazing and filtered daylight make the whole experience feel less like working out and more like checking into a retreat.
