Located on one of Manhattan Beach's most coveted flat walk streets, just moments from downtown and the beach, 405 10th Street is a charming south-facing coastal residence offering inviting interiors, generous outdoor living, and a rare detached guest house. Entering from the walk street, the home welcomes you into a warm, light-filled floor plan where formal living and dining areas overlook the picturesque walk street. Oversized windows, southern exposure, and rich hardwood floors create an inviting setting, while a floor-to-ceiling fireplace anchors the living room. Glass sliders off the dining area open to a tiered front terrace with multiple spaces for dining, lounging, and entertaining. At the center of the home, the kitchen and family room unfold through an open-concept design. Centered around a large island, the freshly painted kitchen features stainless steel appliances, double wall ovens, a wine refrigerator, gas cooktop, built-in refrigerator, and ample cabinetry. Beyond, the family room offers a comfortable secondary living space overlooking the private center yard, sun deck, and in-ground spa. Upstairs are three bedrooms and two bathrooms. Both secondary bedrooms feature vaulted ceilings, oversized architectural windows, generous closets, and access to a full bathroom. Overlooking the walk street, the primary suite offers vaulted wood-beamed ceilings and oversized glass sliders opening to a private terrace. The ensuite bathroom includes a glass-enclosed shower, freestanding soaking tub, private water closet, and generous cedar-lined closet with custom built-ins. Outside, the center yard and sun deck create a private setting for dining, entertaining, and relaxing. A spa beneath a pergola and outdoor shower further enhance the Southern California lifestyle. The property also offers exceptional parking with a three-car driveway and three-car garage. Above the garage, a fully permitted one-bedroom plus office guest house with separate address provides flexibility for guests, extended stays, a private workspace, or additional income. The light-filled residence includes a spacious living room, versatile flex space, bedroom with ensuite bath, and bright kitchen overlooking downtown Manhattan Beach. With its prime walk street location, indoor-outdoor living, six-car parking, and detached guest residence, 405 10th Street presents a rare opportunity to enjoy the best of Manhattan Beach living just moments from downtown, the beach, dining, and shopping.