Welcome to 389 Mercer Ave, a brand-new luxury residence in one of the very few coveted end-of-cul-de-sac locations in River Edge. Set on a leveled lot with new poured foundation, this remarkable home combines sophisticated architecture, and exceptional craftsmanship. Approx. 5200SF including all levels. Enter through the dramatic double-height foyer into the first floor, featuring soaring double-height living and family rooms, creating an impressive yet inviting atmosphere. A luxurious chef's kitchen, thoughtfully designed for everyday living and entertaining, with premium finishes, generous workspace, and a huge walk-in pantry complete with an additional refrigerator. The elegant dining room features a sophisticated wet bar. A private first-floor guest suite with an attached full bath offers exceptional flexibility. A beautifully appointed home office, convenient mudroom, powder room, completes the main level. Upstairs, the luxurious primary suite provides a private retreat, featuring a spa-inspired primary bath and an expansive walk-in closet. Three additional bedrooms, one with its own en-suite bath, while a beautifully appointed common full bath and dedicated laundry room add convenience and functionality. The fully finished basement extends the living space with full-height ceilings and a full bath, offering endless possibilities. Additional highlights include an attached 2-car garage, paver driveway and deck, 4-zone high-efficiency HVAC, underground sprinklers.