The property on which the Lenthall Houses presently stand was once part of the town of "Hamburg" or "Funkstown" owned by German emigrant Jacob Funk who laid out the town in 1768. The original addresses of the homes were 612 and 614 19th Street NW, but they were moved to 606 and 610 21st NW and restored in 1978-1979. The two red brick Federal houses were probably built around 1800 and, although somewhat altered, they still retain the simple dignity of the period. The house at 610 21st Street was in the possession of the Lenthall family for over a century and the Arts Club of Washington was founded in this house in 1916.
Constructed of red brick laid in Flemish bond, the original houses are two stories high with attic and basement. The grey saddleback roof contains two wooden dormers, one on each house. There are two chimneys at the north gable and two at the south gable of the roof. Designed as a unit, both houses share the same roof and cornice line.
DC designation: November 8, 1964
National Register listing: March 16, 1972