Exceptional Living in the Hills of Rosemont. Behind a graceful iron gate , this 12.5 acre estate offers privacy, beauty, & an easy connection to nature, set within the exclusive, gated Hills of Rosemont. A long, tree-lined drive winds through manicured lawns and award-winning gardens, creating a sense of arrival that feels both grand & welcoming. Thoughtfully designed by Summer House Architects, built by Bost Homes, & renewed by Rufty Homes the residence combines enduring materials-Vermont slate, Pennsylvania stone, copper accents with modern comforts including Sonos whole-house sound, Lutron lighting, dual generators, and a Kinetico water system. Broad terraces & screened porches invite you to relax & enjoy the grounds in every season. Inside, light-filled rooms flow effortlessly. A slate-floored foyer framed by a stone arch leads to a comfortable living rm with custom millwork & a see-through fireplace. The Dining Rm, with lacquered cabinetry and a coffered ceiling, is perfect for gatherings, A chef's kitchen with quartzite waterfall island, eight-burner Miele range, wine refrigerator, and a well-equipped prep kitchen makes entertaining a pleasure. The main-level primary suite offers quiet luxury with paneled walls, dual walk-in closets, and a spa bath featuring heated marble floors, jetted tub, & multi-head shower. A private office with secure guilt-ins completes this retreat. Upstairs, three ensuite bedrooms share access to a cedar storage room, bonus lounge, or fitness studio. A fifth suite on the lower level is ideal for guests or multigenerational living. The leisure pavilion is the heart of the home, featuring a striking indoor pool with cascading waterfall, heated stone floors, and remote glass walls that open to the outdoors. A built-in aquarium creates a captivating focal point. On the lower level, enjoy a handsome billiard room, wet bar, tiered home theater, game room with patio access, & a temperature controlled wine cellar with tasting room. Two oversized garages with EV charging, dog-wash stations, and a commercial ice maker provide practical convenience, while a covered port cochere ensures an elegant welcome. A spacious laundry suite with dual washers/dryers, custom cabinetry, and a wrapping station adds thoughtful function. Blending timeless craftmanship with contemporary ease, this home is a true retreat-perfect for relaxed everyday living or memorable entertaining in one of the area's most desirable communities.