Welcome to 3100 Garretson Avenue, a striking Mountain Modern estate set on a flat one-acre parcel in prestigious South Corona. Blending clean architectural lines with warm natural materials, this brand-new construction 5,518 sq ft residence offers modern design, volume and livable luxury. Soaring 12-foot ceilings throughout and dramatic 22-foot vaulted ceilings in the main living areas and primary suite create an immediate wow factor. Oversized 10-foot doors and expansive Pella windows flood the home with natural light and seamlessly connect indoor and outdoor living. The home features 5 bedrooms, 4.5 bathrooms, an office and a thoughtfully designed layout built for both everyday living and entertaining. Interior finishes include herringbone French oak flooring with brass inlay, custom rift white oak cabinetry and a refined mix of limestone, marble and onyx surfaces throughout. At the center of the home, the open-concept great room is anchored by a 72-inch linear fireplace wrapped in Casablanca rough-cut stone, adding warmth and architectural texture to the space. The chefs kitchen is designed for both function and style, featuring built-in luxury Fisher and Paykel appliances, dual dishwashers, an oversized island and a full butlers pantry. Bar & lounge area with sink, refrigerator and dishwasher makes entertaining effortless. The primary suite is a true retreat with vaulted ceilings, a see-through stone fireplace and a private bonus room ideal for a gym, lounge or additional office. The spa-inspired bath includes a steam shower with digital Kohler controls, soaking tub, and direct outdoor access. Closets are delivered unfinished, allowing for fully customized built-in systems designed to the buyers exact specifications and storage needs. Additional features include multiple covered California-style patios, multi-zone high-efficiency HVAC, whole-house fan, tankless water system, EV charging and integrated audio and security systems. The expansive grounds offer a rare opportunity to create a true resort-style outdoor living experience, with space for a custom pool, guest house, sport court or fully customized entertaining areas. Car enthusiasts will appreciate the oversized three-car garage plus an approximately 2,000 sq ft detached RV garage, providing exceptional space for vehicles, storage or a private collection. This is an experience that must be felt to be fully appreciated. Private showings available by appointment.