For this small footprint, two-story backyard ADU, our design maximized the available space within a footprint of just over 300 square feet, resulting in a highly functional and beautifully proportioned 670 square-foot ADU. The first floor features a spacious and open-plan layout, combining the kitchen, dining, and living areas into one cohesive space that is ideal for modern living. A full bathroom, equipped with a stacked washer and dryer, along with a closet for the water heater and additional storage, ensures all the necessary amenities are efficiently integrated. The design prioritizes both comfort and practicality, making the space perfect for a variety of uses. On the second floor, a large bedroom with a closet is enhanced by a skylight, filling the space with natural light. A standout feature of the second floor is the cantilevered section, which adds architectural appeal and creates a unique space with a bench and additional storage underneath the windows. This clever design maximizes usable space. This ADU’s design is both functional and visually appealing, with a traditional exterior, creating a harmonious addition to the property. This well-thought-out space is perfect for long-term living or as a rental unit, providing the owners with an elegant and efficient living solution in their backyard.