Step into timeless elegance at 5 Kohlsaat Court—One of the Historic homes in Smithtown, Built in the 1930s and owned by The Kohlsaat Family - a majestic Colonial estate nestled on a serene cul-de-sac in Smithtown. Celebrating over 5,000 sqft of living space across a meticulously maintained residence built in 1935, this property offers 6 bedrooms, 4.5 baths, not including a separate Carriage House that features a legal 1 Bedroom apartment with a Balcony over a 2 car garage. The refined layout of this home exemplifies thoughtful designs for both entertaining and tranquility. Annual Taxes are less than $18k! Be welcomed by a grand staircase foyer framed by rich hardwood floors. Entertain formally in stately living and dining rooms, with a robust Chef's Kitchen and Pantry, cozy up by one of four fireplaces, or enjoy a morning coffee in the bright eat-in kitchen. Unwind at the end of the day in the stately primary bedroom, equipped with an en-suite bathroom, grand fireplace, and an enclosed three-season veranda. With period architecture enhanced by modern comforts such as central air, steam-radiator heating, and multiple en-suite bedrooms, the home blends historic charm with updated living of natural gas heating and updated roof of 2025! The attic has it's own full staircase as well as the laundry room is on the 2nd floor! Set on more than one landscaped acre, the outdoor retreat includes an in-ground pool, patios, and porch space surrounded by mature plantings and irrigation. Additional amenities include the aforementioned detached two-car garage with carriage house above it (1 Bedroom, kitchen, and living space) with it's own cesspool and powered by electric—and a property configuration that once served as chauffeur’s quarters. Located within the acclaimed Smithtown Central School District and offering excellent neighborhood access to parks, shops, and major routes, this property is exceptional in both location and legacy.