1200 Nineteenth Street, NW is an 11-story office building located on the corner of 19th and M Streets, NW in the Golden Triangle business district of Washington, DC. The building was originally constructed in 1965 as an 8-story office building with 2 floors of underground parking. A major renovation of the building was begun in 2007, including the addition of 3 office floors which increased the rentable area of office space to approximately 311,528 square feet. The renovated Class A building features a green roof with a rooftop terrace and a fitness center. The building received LEED-CS Platinum Certification in 2010.