421 Amsterdam Avenue, AKA 187 West 80th Street
Date: 1887-88
NB Number: NB 1393-1887
Type: Flats
Architect: Camp, Frederick T.
Developer/Owner/Builder: John P Thornton
NYC Landmarks Designation: Historic District
Landmark Designation Report: Upper West Side-Central Park Historical District, Vol. 2
National Register Designation: N/A
Primary Style: Neo-Grec and Romanesque Revival
Primary Facade: Brick
Stories: 5
Window Type/Material: One-over-one double-hung/Wood
Structure: Masonry bearing walls
Historic District: Upper West Side - Central Park West HD
Alterations: Originally constructed with storefront(s); Storefront replaced on Amsterdam Avenue facade and corner. Storefront added on West 80th Street facade.