Rare opportunity in the heart of prime Sunset Park! This single-family home sits on a 20' × 100.17' lot with valuable R6 zoning offering approximately 4,867 buildable square feet, providing outstanding development and expansion potential (subject to architect verification), including the possibility to build a 4–5 story building similar to neighboring properties and potential front private driveway access to a garage. The existing building measures approximately 20x38x45' and is currently configured as a 4-bedroom duplex featuring 4 bedrooms and a full bath on the top floor, separate living and dining rooms, kitchen, and half bath on the main level, plus a full finished basement with private front entrance, ideal for additional use. Whether developing, expanding, or enjoying as-is, this is a rare chance to own a flexible, high-upside property in one of Brooklyn’s most in-demand neighborhoods — won’t last.