Welcome to 12 Pinelawn Avenue, an inviting Ranch House residence with 1,438 sq. ft. of above-grade living space (with a total building area of 2,545 sq. ft.) on a 9,148 sq. ft. lot (0.21 acres) in Suffolk County. Built in 1974, this home features 3 bedrooms, 3 bathrooms, a partially finished basement, and an attached 1-car garage. Welcoming open layout featuring hardwood flooring, a bright living room, and a formal dining area. Equipped with wood cabinetry and ENERGY STAR-qualified appliances (including a dishwasher, microwave, oven, range, and refrigerator). Includes a primary bedroom downstairs with a walk-in closet and primary ensuite bathroom, alongside additional comfortable bedrooms and updated full baths. Full, partially finished lower-level walk-out basement for extra use space, utility area, and electric dryer hookups. Backyard Oasis is fully fenced, vinyl-enclosed private backyard highlighting a massive 18 x 20 feet in-ground swimming pool, a covered rear wood deck, patio spaces, and an outdoor storage shed. Private driveway with a garage door opener, central air conditioning, baseboard/forced air oil heating, public water, and a cesspool sewer setup. Located within the Sachem Central School District, close to local shopping, public transit, and parks.