Legal two-family home in Centereach, offering flexible living space and strong income potential. The main unit spans the first floor and finished basement, featuring 3 bedrooms and 2 full baths: 2 bedrooms and 1 full bath on the main level, plus a finished lower level with an egress-window bedroom, 2 additional finished rooms, laundry, and a second full bath, along with its own outside entrance. The second unit is an upstairs 2-bedroom, 1-bath apartment with a private entrance, giving each household its own space and privacy. There are separate electric meters for each unit and a landlord meter (3 meters total), a 1-car detached garage, and generous on-site parking thanks to the corner lot. Recent updates include ductless heat pumps for efficient heating and cooling, a Roth oil tank, brand new hot water heater, hardwood floors have been freshly refinished, and the main level/2nd story has been painted. This property is ideal for an investor, an owner-occupant looking to offset expenses with rental income, or buyers with extended family who need extra space.