Six Cromwell Lane blends timeless elegance with modern design on over six private acres along a quiet country lane. A tree-lined drive leads to an elegant foyer with views straight to the backyard terrace, flanked by sophisticated living and dining rooms with soaring ceilings and abundant natural light. The great room features multiple French doors to the landscaped grounds, a fireplace, coffered ceiling, and entertainment bar, opening seamlessly to the expansive kitchen with island seating, turreted skylights, breakfast room, and generous gathering spaces. A wood-paneled library opens to a glass-enclosed sunroom for peaceful retreat. The first-floor primary suite offers a serene sanctuary with fireplace, spa bath with steam shower and soaking tub, and a private hall to a gallery-style dressing room and custom walk-in closet. Two powder rooms, a laundry suite, and an oversized mudroom with access to the four-car garage complete the main level. Upstairs are three spacious ensuite bedrooms with custom closets and beautifully designed bathrooms, plus a large front-to-back bonus room ideal for a gym or media space. The grounds elevate the experience with a cascading waterfall flowing into a koi pond beside the home's glass walls, a bluestone patio, and pristine tiered lawns. Located in Mendham with highly rated schools, extensive park systems, and proximity to Morristown's shops, dining, and New York City transit, this exceptional property offers luxury, privacy, and a refined lifestyle.