House at 199 Prospect Avenue
 House at 199 Prospect Avenue is a historic home located at Sea Cliff in Nassau County New York. It was built about 1890 and is a two story house with decorative slate jerkinhead roof in the Late Victorian style. It features a three bay shed roof dormer that forms the second floor and covers the entrance porch. It is identical to the House at 195 Prospect Avenue.It was listed on the National Register of Historic Places in 1988.