Welcome to 580 Center Briarwood Avenue in West Islip! A spacious Colonial offering versatile living across three levels. This well-maintained home features oil baseboard heat with radiators, three-zone heating, a separate hot water heater, updated 200-amp electric with sub panel, and mini split systems upstairs for added comfort. The main level includes two bedrooms, one full bath, a bright living room, dining room, kitchen with propane cooking, and beautiful wood and tile flooring throughout. Upstairs offers a private interior and exterior entrance, creating an ideal setup for additional living space. This level includes a living room, dining area, kitchen with electric stove, two bedrooms, two full bathrooms, an additional room, large pantry, abundant storage, luxury vinyl plank flooring, updated windows, and mini splits. The finished basement provides EVEN MORE flexibility with a den, full bath, storage space, laundry area, and a summer kitchen setup with outside entrance. Step outside to enjoy a fully fenced PVC yard featuring a Trex deck surrounding an above-ground pool with updated pump, DE filter, and liner. Additional exterior highlights include in-ground sprinklers, sewer connection, sump pump, and ample outdoor enjoyment space. Offering endless possibilities of living arrangements while delivering comfort, functionality, and generous space throughout all in a convenient location near all public transportation, shops, dining, and more! Make this one yours!