Welcome to 28 Greenvale Lane, an impeccably maintained and thoughtfully expanded residence offering exceptional living space in one of Syosset's most desirable neighborhoods. Designed for both everyday comfort and effortless entertaining, this move-in-ready home features 4 spacious bedrooms, 3 full bathrooms, a 2-car attached garage, and an expansive finished basement. Sunlight pours through the welcoming interior, highlighting the spacious living room, formal dining area, and beautifully updated eat-in kitchen featuring granite countertops, custom cabinetry, stainless steel appliances, and abundant workspace. Three generously sized bedrooms and two full bathrooms on the main level provide outstanding flexibility for guests, multi-generational living, or a home office. Privately situated on the second level, the oversized primary suite offers a tranquil retreat complete with a walk-in closet and an updated en-suite bath. The finished lower level dramatically expands the home's versatility, providing the perfect setting for a recreation room, fitness area, media lounge, or additional workspace, along with extensive storage. Step into the screened porch and enjoy seamless indoor-outdoor living overlooking the beautifully landscaped backyard. Additional highlights include hardwood flooring, updated baths, central air conditioning, natural gas heating, in-ground sprinklers, an oversized driveway, and an attached two-car garage. Ideally located just minutes from shopping, dining, parks, major parkways, and the LIRR, and zoned for the award-winning Syosset Central School District, this exceptional property offers the perfect combination of location, space, and lifestyle. A truly outstanding opportunity to own a spacious, move-in-ready home in one of Syosset's premier communities.