The last streetcar operations at the Car Barn ended with the closure of the Rosslyn–Benning Line on April 30, 1949.
The building continued to store streetcars until May 1950.
Toward the end of 1952, the first floor was converted into office space.

When the Capital Transit Company merged with its competitors, the building came under the ownership of its new corporate successor, the DC Transit System, in 1956.
By then, the building had fallen into such a state of disrepair that the company deliberated over whether to demolish it entirely.
Seeking to preserve the historic structure, it elected to redevelop it.
The building underwent considerable interior renovations between 1957 and 1960, which were intended to turn the structure entirely into an office building.
This involved lowering the ceilings, which were previously designed to accommodate the height of the streetcars.
The building was included in the Historic American Buildings Survey in 1967.

Beginning in late 1963, the Car Barn was home to the International Police Academy, operated by the Central Intelligence Agency (though officially part of the Agency for International Development) that trained Latin American police forces; members of these forces met at the Car Barn until the program was shut down in 1975.

In 1992, the owner of the DC Transit System, O. Roy Chalk, was subject to foreclosure, and the building came under the ownership of the Lutheran Brotherhood.
The Car Barn was purchased in 1997 by Douglas Development Corporation—which continues to own the building—and it was renovated the following year.
The primary tenant is Georgetown University, which first began leasing space in the 1950s.
After two years of renovation by the university that ended in 2017, the first floor garage was converted to house the Graduate School of Arts and Sciences and the Georgetown University Press.
The building today has four floors and has a floor area of 81,765 square feet (7,596 m²).
The Car Barn was listed on the District of Columbia Inventory of Historic Sites on January 24, 2019, and the National Register of Historic Places as part of a multiple property submission named "Streetcar and Bus Resources of Washington, DC" on August 9, 2019.
The last streetcar operations at the Car Barn ended with the closure of the Rosslyn–Benning Line on April 30, 1949. The building continued to store streetcars until May 1950. Toward the end of 1952, the first floor was converted into office space.
When the Capital Transit Company merged with its competitors, the building came under the ownership of its new corporate successor, the DC Transit System, in 1956. By then, the building had fallen into such a state of disrepair that the company deliberated over whether to demolish it entirely. Seeking to preserve the historic structure, it elected to redevelop it. The building underwent considerable interior renovations between 1957 and 1960, which were intended to turn the structure entirely into an office building. This involved lowering the ceilings, which were previously designed to accommodate the height of the streetcars. The building was included in the Historic American Buildings Survey in 1967.
Beginning in late 1963, the Car Barn was home to the International Police Academy, operated by the Central Intelligence Agency (though officially part of the Agency for International Development) that trained Latin American police forces; members of these forces met at the Car Barn until the program was shut down in 1975.
In 1992, the owner of the DC Transit System, O. Roy Chalk, was subject to foreclosure, and the building came under the ownership of the Lutheran Brotherhood. The Car Barn was purchased in 1997 by Douglas Development Corporation—which continues to own the building—and it was renovated the following year. The primary tenant is Georgetown University, which first began leasing space in the 1950s. After two years of renovation by the university that ended in 2017, the first floor garage was converted to house the Graduate School of Arts and Sciences and the Georgetown University Press. The building today has four floors and has a floor area of 81,765 square feet (7,596 m²). The Car Barn was listed on the District of Columbia Inventory of Historic Sites on January 24, 2019, and the National Register of Historic Places as part of a multiple property submission named "Streetcar and Bus Resources of Washington, DC" on August 9, 2019.
Georgetown Car Barn