Planning and opening In the
Dual Contracts, adopted on March 4, 1913, the
Brooklyn Rapid Transit Company (BRT; after 1923, the
Brooklyn–Manhattan Transit Corporation or BMT) was selected to operate a subway route from
14th Street in
Manhattan to
Montrose Avenue in
Brooklyn. This became the 14th Street–Eastern District Line (later the
Canarsie Line. In late 1915, the Public Service Commission began receiving bids for the construction of the 14th Street Line. MacArthur Brothers Co. had received a $1.336 million contract for the construction of section 5 in Brooklyn, which included a station at
Grand Street, by June 1916. Organizations such as the Grand Street Board of Trade and the Grand Street Improvement Association were supportive of the project. The 14th Street Tunnel under the East River had been fully excavated by August 1919. The line's opening was delayed by several years. In 1922, Mayor
John Francis Hylan blocked some construction contracts, claiming that the costs were excessively high. The Station Finish Corporation was contracted to build the stations in Brooklyn, including Grand Street. Track-laying in the tunnels between Sixth and Montrose Avenues started in the last week of October 1922. This station opened on June 30, 1924, as part of the initial segment of the Canarsie Line from the
Sixth Avenue station in
Manhattan to the
Montrose Avenue station.
Later improvements In 2019, the
Metropolitan Transportation Authority announced that this station would become ADA-accessible as part of the agency's 2020–2024 Capital Program. A contract for two elevators at the station was awarded in December 2020 with funding that was originally earmarked for the
Penn Station Access project. The new elevators were almost complete by early 2023, and they were finished on August 31, 2023. In 2024, the MTA installed low platform-edge fences at the Grand Street station and several others on the Canarsie Line to reduce the likelihood of passengers falling onto the tracks. The barriers, spaced along the length of the platform, do not have sliding
platform screen doors between them. ==Station layout==