52 Atlantic Estate represents a rare opportunity in the Portuguese real estate market: a fully autonomous property, integrated into the Sintra-Cascais Natural Park and set on an impressive 30,000 m² private plot with panoramic views over the Atlantic. This sustainable retreat combines contemporary luxury, absolute privacy, and a truly unmatched location atop the cliffs of Assafora, in Sintra. The property underwent a profound transformation between 2022 and 2025, elevating it to the highest standard of efficiency and energy independence. Powered exclusively by solar energy with 21 kW of photovoltaic panels and 50 kWh of battery storage it operates fully off-grid, requiring no connection to the public grid. Water comes from a 250-meter artesian well and is fully treated on-site through advanced filtration systems, ensuring total autonomy and exceptional quality. The main residence is spread across two independent floors, offering nine bedrooms, several social areas, two kitchens, and generous interior spaces bathed in natural light. Its geographical positioning creates a unique microclimate that eliminates the need for air conditioning, ensuring year-round natural comfort thanks to the ascending maritime currents from the cliffs. Outdoors, the architecture is designed for well-being and social living: a swimming pool, lounge with firepit, pergola, enclosed barbecue with wood-fired oven, gym, support bar, and even a helipad. There is also an independent guest cottage and multiple agricultural structures, including 2.5 hectares of cultivation and around 100 vines, all supported by an efficient irrigation system powered by the well. The most magical point lies at the edge of the property: a natural viewpoint over the ocean, considered one of the most breathtaking sunset spots on the Portuguese coast. Distinguished with several international sustainability and design awards, 52 Atlantic Estate is more than a property, it is a lifestyle. An ecological sanctuary where luxury, nature, and autonomy come together in perfect harmony.