In addition to housing horses and later cars, the building contained living quarters for two of Codman's employees and their families.

After Apex closed in 2011, the longtime Capitol Hill lesbian bar Phase 1 opened a second location in this building.

The Codman Carriage House and Stable was added to the District of Columbia Inventory of Historic Sites in 1995.

In the late 19th and early 20th centuries, the Dupont Circle neighborhood in Washington, D.C. was an area of a large number of elegant and impressive homes owned by businesspeople, politicians, and other members of high society.

She was a wealthy socialite, philanthropist, and art collector, who had inherited a large amount of money from her parents, Martha Pickman Rogers and John Amory Codman, a businessman who earned his fortune in the clipper ship trade.

Like many wealthy people of the period, Codman split her time between winter and summer residences; the latter was in Newport, Rhode Island.

The Classical Revival mansion he designed for her, the Codman–Davis House, was built at 2145 Decatur Place NW, on the edge of the Dupont Circle and Sheridan-Kalorama neighborhoods.

The following year Karolik commissioned Codman Jr. to design a two-story, brick and stucco carriage house and stable at 1415 22nd Street NW, a few blocks south of her home.

[1] In 1940, new owner Benzalim Coran hired Renato Corte to design a one-story rear brick addition that was built by L.F. Collier.

[7] An ad in 1949 marketed the property as a possible headquarters for a national organization, automobile showroom, or store space.

[14] That same year a restaurant called the African Room opened in the rear portion of the building, facing Twining Court.

[15] The Last Hurrah continued operating until 1983 when Glen Thompson opened Badlands, a gay bar, later that year.

[17] Soon after Badlands opened in May 1983[3], its practice of carding (asking for several forms of identification) African Americans or telling them the bar was full to prevent them from entering resulted in protests.

Local activists filed complaints with the city's Commission on Human Rights, and Badlands management paid a settlement of $5,000.

[19][21] After Apex closed, local businessman Allen Carroll purchased the building and opened a second location of the Capitol Hill lesbian bar, Phase 1, in February 2012.

[11][17][22] While the building was still operating as Badlands, local historic preservationists with the Dupont Circle Citizens Association, Dupont Circle Conservancy, and DC Preservation League submitted an application to have the building designated a historic landmark, citing its significance as a surviving carriage house and stable, along with its connection to Codman and her architect cousin, Codman Jr.[1] The building was added to the District of Columbia Inventory of Historic Sites as the Codman Carriage House and Stable on December 19, 1995.

The following year the company announced an extensive restoration and renovation process would begin to transform the building into office space: "Our goal with this property is to bring it back to life.

[27][28] The project, which included adding a roof deck and skylights, window and facade restoration, and replication of the original carriage house doors, was completed in 2018.

His notable clients included Edith Wharton, who coauthored with Codman Jr. the interior design manual The Decoration of Houses.

[1][32][33] The Codman Carriage House and Stable is sited on Square 68, Lot 34-36, fronting 22nd Street NW in Dupont Circle.

The lots' proximity and easy access to Rock Creek Park and Dupont Circle were integral to Codman's choosing this site for the support building.