18 Helene Avenue is a 5-bedroom, 3-bath single-family home for sale in Merrick NY 11566. Listed on Prevu for 175 days at $1,350,000. This includes a recent price increase of $50,000. This home features 3,247 square feet of living space, located in Merrick. The median listing price for single-family homes in this area is $1,024,500. Nearby schools include Chatterton School Elementary School, Merrick Avenue Middle School, and John F Kennedy High School. Additional amenities include air conditioning and parking. View other single-family home listings in Nassau County.