The Urban Rowhouse is an historic residential rowhouse located at 26–32 River Street in Cambridge, Massachusetts. These rowhouses were built in 1860 by Frederick Clapp, and are among the earliest surviving examples of the type in the city. They feature a combination of brick and brownstone masonry, but also with some trim made out of wood that has been treated to appear like brownstone. They bear some resemblance to rowhouses built at the same time in Boston's South End.