Madrid, Madrid 28003

^^The One^^ Exclusive Luxury Unique Duplex Penthouse In Madrid With Over 1, 500 M And Private Terraces With Pool^ ^ A Brand New PROPERTY The One, a truly one-of-a-kind duplex penthouse in the heart of Madrid. Located in a stately building next to Paseo de la Castellana, this architectural gem elevates the concept of exclusivity to its highest expression. With more than 1, 500 m built between living spaces and exteriors, The One is currently the only penthouse of its kind for sale in all of Madrid.The penthouse offers 600 m built over two floors connected by interior and exterior staircases: a main floor of 400 m and an upper floor of 150 m. The exterior comprises 750 m of private terraces with panoramic views embracing the Madrid skyline. The main terrace features perimeter Led lighting, automatic irrigation, bar and barbecue area, covered porch, motorized awnings, heated infinity pool with counter-current system, Roman steps, integrated lighting, independent changing rooms, and an elegant glass front that enhances the feeling of spaciousness.On the upper floor, a nearly 300 m terrace is among the highest in Madrid, offering unobstructed views, complete privacy, and an ideal setting for both quiet reflection and select events. All bedrooms are en suite, with private bathrooms and walk-in closets, bathed in natural light and finished with top-tier materials. The kitchen is highlighted by a central suspended island of avant-garde design and includes a full service area with laundry and en suite staff bedroom.The One is designed to meet the highest standards of sustainability and energy efficiency: thermal and acoustic insulation, radiant and cooling floor systems powered by aerothermal technology, and finishes suitable for Passivhaus certification. It includes two large adjacent garage spaces and direct, independent access to the main terrace via one of the buildings five elevatorsa rare feature that reinforces its exceptional nature.Located just steps from Madrids financial and business hub, this penthouse rises in one of the capitals most prestigious areas, surrounded by classical architecture, luxury boutiques, fine dining, and a privileged transport network. A stones throw from Azca, Paseo de la Castellana, and the Santiago Bernabu Stadium, The One offers a lifestyle where luxury, privacy, and urban dynamism coexist in perfect harmony.The residence has been conceived as a masterpiece of contemporary design, executed with excepti