Located in the heart of Manhattan Beach with exceptional walkability to downtown, the beach, and local schools, 721 12th Street pairs thoughtfully designed interiors with flexible living spaces, air conditioning, and a private backyard retreat. Spanning multiple levels connected by an elevator, the home offers a seamless balance of everyday functionality, entertaining, and indoor-outdoor living. The lower level, once a separate studio, has been thoughtfully integrated into the main residence while maintaining a sense of privacy from the primary living areas. A wall of La Cantina doors spans the rear of the space, filling the interior with natural light and opening directly to the backyard. Designed for versatility, the level features a wine closet, full bar, granite-topped kitchenette, custom cabinetry, built-in desk, and queen-size wall bed, creating an ideal setting for entertaining, working from home, or accommodating overnight guests. Outside, the private backyard offers a tranquil escape complete with a waterfall feature, stone gas fire pit, and turf lawn. Ascending to the second level, the primary suite serves as a peaceful retreat with its own private balcony, fireplace, and spacious walk-in closet with custom cabinetry. The ensuite bathroom offers a spa-like experience with a large soaking tub and generous glass-enclosed shower with a pebble floor. Two additional bedrooms with Juliette railings share a full bathroom, while a dedicated laundry room with granite countertops and cabinetry completes the level. The upper level is designed around the home's main living and entertaining spaces. The renovated kitchen is finished with Taj Mahal quartzite countertops, a Sub-Zero refrigerator and wine refrigerator, Thermador range and oven, and a generous walk-in pantry. A sun-filled breakfast nook with built-in bench seating is surrounded by windows offering glimpses of the ocean, while an adjacent patio extends the space outdoors. A second spacious patio provides room for al fresco dining and entertaining. Also on this level, a flexible office or fifth bedroom features built-in bookshelves, cabinetry, and a desk, while an oversized balcony captures views across the backyard and toward the mountains. Thoughtfully designed for both everyday living and entertaining, 721 12th Street offers an exceptional combination of flexible spaces, indoor-outdoor connection, and convenience in one of Manhattan Beach's most desirable locations.