Welcome to 315 Lyon St, Valley Stream, NY a breathtaking brand new contemporary modern masterpiece offering an unparalleled living experience in the heart of Nassau County. This magnificent 2-story residence boasts an impressive 6449 sq ft of above-grade living space plus a sprawling recreational basement, delivering a total of 5 generously sized bedrooms and 6.5 luxurious bathrooms thoughtfully designed for both elegant entertaining and comfortable everyday living. Step through the grand foyer into a beautifully flowing first floor featuring soaring 9-foot ceilings, a dramatic living room with oversized floor-to-ceiling windows, formal dining room, gourmet chef's kitchen with double refrigerators, a warm butler's kitchen, an expansive family room, a private guest bedroom with full bath, powder room, and a practical mudroom all bathed in natural light through large geometric Andersen 400 series hurricane-rated windows. The second floor is an absolute sanctuary, showcasing a lavish master suite with a spa-inspired bathroom, oversized walk-in closet, and tray ceiling, accompanied by three additional spacious bedrooms each with their own dedicated full bathrooms and walk-in closets, a conveniently located laundry room, and a stunning private balcony perfect for morning coffee or evening relaxation. The fully finished lower level offers endless possibilities as a home theater, gym, or entertainment haven, complete with a full bathroom. The striking exterior facade commands attention with its sophisticated blend of stone, stucco, and wood accents, dramatic aluminum composite panel overhangs, and clean contemporary lines that set this home apart from anything else on the market. Built to the highest standards with R-15 exterior wall insulation, R-30 roof insulation, TPO flat roof system with stainless counter flashing, hardwood floors of owner's choice, tray ceilings, Simpson HDU5 holddown connections, and full compliance with 2020 NYS Building Code and Town of Hempstead approved plans every detail of this home reflects exceptional quality and craftsmanship. Situated on a 8,000 sq ft lot with two driveways, this stunning property is ideally located just minutes from the Valley Stream LIRR station offering a 30-minute express commute to Manhattan, with easy access to the Belt Parkway, Southern State Parkway, top-rated schools, premier shopping, and fine dining. This is truly a once-in-a-generation opportunity to own a remarkable newly constructed luxury home that redefines modern living in Valley Stream schedule your exclusive private showing today before it's gone! This custom new development is being built by the number one builders in Nassau County HiLand Developers.