A Once-in-a-Generation Riviera One Estate Opportunity with Private Beach Rights.  Presenting an extraordinary opportunity to acquire one of the most coveted properties in the prestigious Riviera One neighborhood--an offering that has never before been available on the open market. Situated on approximately 1.69 acres of rare, flat usable land and accompanied by partial ownership of Lot 51 Private Beach, this exceptional Mid-Century estate represents a truly unparalleled legacy property in one of Malibu's most exclusive enclaves. Nestled among some of the most celebrated estates, the property enjoys an enviable setting that combines privacy, prestige, and endless potential. A circular driveway welcomes you to the timeless single-story residence, complemented by an attached two-car garage topped by a fully permitted approximately 740-square-foot Mid-Century ADU.Originally built in the mid-1950s, the residence retains its authentic architectural character while benefiting from thoughtful updates throughout. Newly installed light-toned engineered hardwood flooring, fresh interior paint, and upgraded windows enhance the home's bright, airy ambiance. Soaring vaulted ceilings with exposed wood beams, walls of glass, and abundant natural light create an inviting atmosphere, while a striking natural stone fireplace with custom built-in shelving serves as the centerpiece of the main living area. The kitchen flows seamlessly into a sun-drenched breakfast and dining room overlooking a sprawling grassy courtyard, offering the perfect setting for intimate mornings or elegant gatherings. The primary bedroom has upgraded windows and offers a beautifully remodeled bathroom with new vanity with quartz counters, and spacious walk-in shower. Two additional guest bedrooms, including one with direct access to a private outdoor area, are complemented by a guest bath that preserves its original Mid-Century charm. What truly distinguishes this offering is the land. The expansive flat lot is among the most remarkable parcels on Zumirez Drive, presenting a rare canvas for the creation of a world-class estate compound. Imagine the endless possibilities to build a resort-inspired backyard which could feature a pool and spa, championship sport court, wellness pavilion, collector's garage, additional ADUs, or any combination of luxury amenities. The property backs to open space and a picturesque creek that meanders directly to the Pacific Ocean, providing a serene natural backdrop and exceptional privacy. Above the garage, the permitted ADU offers ocean views, vaulted wood-beamed ceilings, a charming covered balcony, an open-concept kitchen and living area, plus a spacious bedroom and bath--ideal for guests, extended family, staff accommodations, or supplemental income. Close distance to ZUMA Beach, Paradise Cove and many more world famous spots that this part of Southern California has to offer. Rarely does a property of this caliber become available. Combining private beach rights, Mid-Century architectural appeal, celebrity-adjacent provenance, and limitless development potential, this is a landmark Riviera One estate offering destined for the most discerning buyer.