Welcome to 20 Carlisle Drive in Old Brookville, a wonderful North Shore center hall colonial nestled on a serene, tree-lined private cul-de-sac. Offered for the first time since its construction, this residence features 5 bedrooms, 4.5 bathrooms, and is situated on two acres, complete with a gunite pool and tennis court. As you enter the home, you are greeted by a grand two-story foyer. Continuing down the main hallway, you will find a charming formal dining room with bay windows, a spacious living room that opens to a cozy den with fireplace - perfect for gatherings - and a convenient powder room. The large eat-in kitchen is the heart of the home. It features room for a sizable table, a breakfast bar, an island with built-in range top, double wall ovens, a Sub-Zero refrigerator, and ample cabinet and counter space. Beyond the kitchen, there's a laundry area, a full bathroom, and a versatile first floor bedroom which can serve as a guest suite or office. Adjacent is a large great room with a fireplace, recessed ceilings, and access to the two car garage. Upstairs, the primary suite features two walk-in closets, a cedar closet, and a bright, skylit en-suite bathroom with large shower, spa tub with views of the pool area, bidet, and double vanity. Down the hall from the primary bedroom are three additional spacious bedrooms, each with oversized closets, and a shared full bathroom with double vanity. Outside, the sprawling brick patio, gunite pool, elevated tennis court, and additional open field space create a truly luxurious getaway. Whether you are looking to relax, play, or entertain, this property offers it all. Don't miss out on this fantastic opportunity to own in Old Brookville.