Luxury living meets resort-style entertaining at 2623 Frederick Terrace! This exceptional Union residence offers sophisticated interiors, thoughtful upgrades & a spectacular private backyard oasis. The open-concept main level features soaring ceilings, recessed lighting, a gas fireplace with built-ins & a stunning kitchen with center island, abundant storage, tile flooring & premium GE Monogram appliances. Upstairs, the luxurious primary suite features a vaulted ceiling, oversized windows, recessed lighting & backyard views, plus a spa-like bath with skylight, stand-up shower & separate Jacuzzi tub. A WIC with custom built-ins & attic access completes the suite. The 2nd & 3rd bedrooms each offer natural light & double-door closets, with a full guest bath completing the level. The finished basement includes central vac, tankless Navien HWH, serviced boiler, laundry, 200-amp service + additional panel & Generac whole-house generator connected to natural gas. The backyard is a true retreat with a heated in-ground pool, filtered by an EcoSmarte copper-based system, waterfall, connected spa, pergola, patio, outdoor kitchen with Weber grill, cooler & mini fridge, vegetable garden, mud kitchen & irrigation. 1-car garage, paver driveway, 2 garage refrigerators, underground drainage & main sewer line replaced approx. 8 years ago. Convenient to Millburn Train Station & a nearby bus stop with direct service to NY Port Authority. A rare blend of luxury, comfort & effortless entertaining.