Welcome to 38 Riverview Terrace, an exceptional custom-built Colonial offering five bedrooms, three full bathrooms and one half bath, with an extensive array of high end finishes, entertainment spaces and resort-style outdoor amenities. A grand foyer welcomes you with wainscoting, chandelier and stunning maple hardwood flooring that continues throughout the first floor. The main level features an elegant formal dining room and a spacious den anchored by a wood-burning fireplace. The expansive eat-in chef’s kitchen is designed for both cooking and entertaining, featuring a large 7'10" center island, quartz countertops throughout, skylights, a breakfast area and modern farmhouse sink. High-end Sub-Zero and Wolf appliances include an eight-burner Wolf range with double ovens, a massive custom hood with pot filler, an additional wall oven, warming drawer, built-in microwave, ice maker and wine cooler. Radiant heated flooring completes the kitchen. A powder room with radiant heated flooring is conveniently located on the main level for guests, along with a dedicated first-floor laundry room. Upstairs, the spacious primary suite features an impressive custom walk-in closet and spa-inspired bath with a soaking tub, radiant heated flooring and heated towel rack. Four additional bedrooms and beautifully appointed bathrooms provide plenty of space throughout the home. Skylights throughout bring an abundance of natural light into the residence. The finished lower level is designed for recreation and entertainment, offering an expansive recreation area with a wet bar and dedicated media room/home theater with its own home entertainment system. The home is wired for seven televisions, while a Sonos sound system with outdoor speakers extends the entertainment outdoors. The backyard offers private country club style amenities, beginning with a spectacular heated in-ground pool with cascading waterfall surrounded by expansive armortec paving stones. Professionally landscaped grounds and dramatic landscape lighting create a beautiful setting for outdoor entertaining. A fully equipped outdoor kitchen with built-in grill, pergola and pavilion provide additional gathering spaces, while a pickleball court and basketball court offer recreation right at home. An attached two car garage completes this extensively appointed Smithtown residence, offering exceptional indoor and outdoor living with amenities designed for entertaining, recreation and everyday enjoyment.