[2] The building was enlarged in 1909 to fill the western half of the block with a one-story addition that is not as stylistically ornate, but mimics the original design.

[2] The Navy Yard was the terminus of a cable car route that ran up 8th Street to Pennsylvania Avenue, continuing to Georgetown.

[3] The railway was acquired by the Capital Traction Company in 1895, and after a fire destroyed the main powerhouse in 1897, the cable cars were replaced with electric.

[8] It is only Washington and Georgetown Railroad Company building to survive the cable car era, which was one of the reasons that the NPS decided to add it to the NHRP.

[7] In January 2008, Madison Marquette Real Estate Services purchased the building, held it as an investment and used its space for offices.