Set on nearly one acre in prime lower Bel Air, 642 Perugia Way is an architectural tour de force conceived by British firm Quinn Architects and stands as one of the most remarkable private estates to come to market, where architecture, jetliner views, and natural light shape every space. Sited at the end of a cul-de-sac on one of Bel Air's most coveted streets with its own dedicated security, the property offers a level of discretion rarely available at any price. Fully gated, arrival unfolds through a sleek stone motor court with 4-car garage introducing the home's craftsmanship and sculptural presence. Inside, a floating staircase anchors the entry and motorized Fleetwood glass walls open entire elevations to travertine terraces beyond. Expansive walls and exquisite light quality create gallery-like settings ideal for showcasing art across all three levels. Smart home technology controls lighting, climate, security, and audiovisual. The main level is built for entertaining featuring a chef's kitchen with Miele appliances supported by a fully outfitted butler's kitchen, allowing large gatherings to unfold effortlessly. Living and dining areas open to the backyard, where a sunken firepit gives way to the estate's centerpiece: a 65-foot infinity-edge pool with views over the Bel-Air Country Club and surrounding hills. Garden terraces, clipped hedgerows, and specimen plantings wrap the grounds in total privacy while softening the residence into the natural hillside. The primary suite is in a class entirely its own occupying a generous private wing on the upper level, it encompasses a bedroom of hotel-like grandeur. The spa bath is framed in travertine and Carrara marble, with a soaking tub open to a private patio featuring a jacuzzi and firepit. Dual dressing rooms are fitted with bespoke millwork and glass display islands. The lower level is dedicated to entertainment and wellness featuring a state-of-the-art gym, cinema-grade movie theatre, bar and lounge, and a temperature-controlled glass-enclosed wine cellar. 642 Perugia presents one of Bel Air's most significant contemporary estates.