***Multiple offers received. Highest and best due by Monday 4/21 at 1pm thank you***Welcome to your own slice of paradise on sought-after Thornhill Court, The House on the Lake! Perfectly nestled at the top of a peaceful cul-de-sac, this spectacular 4 bed, 3.1 bath home is a rare find in Deer Park. With over 4,200 sq ft of beautifully designed living space on over 1.3 acres, every detail is crafted to embrace the beauty of lakefront living. From the moment you turn onto Thornhill, the serene setting of Kelly Lake unfolds before you, offering views that will stop you in your tracks and stay with you long after you leave. Inside, natural light pours through oversized windows, showcasing panoramic water views from nearly every room. Vaulted ceilings and an airy layout elevate the space. The heart of the home is a thoughtfully updated kitchen with white cabinetry, granite countertops, stainless steel appliances (2017), and an expansive island perfect for storage, meal prepping, or gathering. A reverse osmosis water system adds convenience, while the sunny eat-in area leads directly to a wraparound deck. The great room features a cozy fireplace and connects seamlessly to a tranquil sunroom. First-floor bedroom suite with a separate entrance and adjacent full bath makes for perfect guest arrangements. Upstairs, the luxurious primary suite is your personal sanctuary complete with a peaceful sitting area, custom walk-in closet and dressing room, and a balcony overlooking Kelly Lake. Relish in the spa-like bath offering a dual sink vanity, freestanding soaking tub, and walk-in shower. Two additional bedrooms, one with its own ensuite, plus a large bonus room give you plenty of flexibility for work, play, or guests. Discover the finished lower level featuring a versatile rec room, with plenty of unfinished space ready for your creative vision and year-round storage solutions! Oversized 3-car garage provides generous storage and direct access to the lower level for added functionality. Step outside to experience what truly sets this home apart, your own dock on Kelly Lake, perfect for fishing, kayaking, or simply relaxing by the water. The backyard is a secluded oasis, made for making lasting memories. Plus, enjoy a built-in invisible fence for dogs, two NEW AC units, and a new basement furnace (all in 2023). Looking for more outdoor activity or a leisurely stroll? Check out Charles E Brown Park around the corner! This home is conveniently located minutes from Deer Park Town Center, downtown Barrington, parks, playgrounds, the Metra, and top-rated District 220 schools! This is more than just a home. It's a lifestyle. Welcome to lake life, without ever leaving home! Welcome home!