Perched on a knoll in Cheviot Hills' Monte Mar enclave, this custom architectural residence by Eric C. Chang, AIA, reveals a quiet sophistication, where an understated exterior gives way to a deeply intentional interior shaped by light, proportion, and thoughtful design. Rebuilt from the ground up in 2012-2013 and thoughtfully upgraded over the past year, the home draws inspiration from the philosophy of "round heaven, square earth," with circular and linear forms woven throughout to create a sense of harmony, balance, and flow. Sunlight fills the south-facing interiors, where open living spaces unfold with ease and continuity. The main level is conceived as a continuous living space, with living, dining, and kitchen areas flowing together, framed by expansive windows that capture soft greenery and hillside views. Circular openings and windows act as sculptural portals, establishing a quiet architectural rhythm, while a dramatic glass-enclosed stairwell introduces movement and layered perspectives across levels. Also on the main level, the primary bedroom suite offers a private retreat, complete with a spa-like bath featuring dual vanities, a soaking tub, separate shower, and two generous walk-in closets. At the heart of the home, a beautifully crafted washitsu room with tatami flooring and shoji screens offers a rare and versatile living experience, equally suited for tea gatherings, intimate dining, meditation, or yoga. Both serene and social, it reflects a lifestyle that values presence, connection, and balance. Additional tatami-accented spaces extend this design language, creating a cohesive sense of calm throughout. Designed for both active living and quiet retreat, the lower level is anchored by a family room with soaring 14-foot ceilings and a new fireplace, complemented by three en-suite bedrooms with walk-in closets, and a dedicated office positioned for privacy and flexibility, including its own entrance. Outdoors, terraced gardens and mature plantings, including tall bird of paradise, create a lush, layered setting that enhances both beauty and stability, offering inviting spaces for entertaining, play, or peaceful moments throughout the day. Located near Rancho Park Golf Course, Cheviot Hills Park, and key Westside access, this residence offers a rare balance of architectural clarity, warmth, and a lifestyle that feels at once active, connected, and quietly restorative. (Please note: Public records show 4 bathrooms, but there are actually 3 full baths, one 3-quarter bath, and a powder room. According to owner/architect, the city approved bathroom additions and signed off on the Certificate of Occupancy.)