[10] By January 1925, the BMT was asking its passengers to pressure Hylan into approving the remainder of the Nassau Street Line.

The Marcus Contracting Company was hired to build the portion north of Liberty Street, including the Fulton Street station, for $4.7 million, while Moranti and Raymond were hired to build the portion to the south for $5.7 million.

[5] Additionally, the station underpinned the former Sub-Treasury building (now Federal Hall) at the northeast corner of Wall Street and Nassau Street; the city had to receive permission from the United States Congress to dig under the building, and it constructed a new foundation for that edifice.

[23][21] Later that year, a federal judge ruled that the city government did not have to pay the BMT $30 million in damages for failing to construct the Nassau Street Line.

The new line provided an additional ten percent capacity compared with existing service through DeKalb Avenue.

[20] In April 1993, the New York State Legislature agreed to give the MTA $9.6 billion for capital improvements.

Some of the funds would be used to renovate nearly one hundred New York City Subway stations,[34][35] including Broad Street.

[39] The plans call for two elevators, one for each platform, at the northeastern and southwestern corners of Broad Street and Exchange Place.

[42] However, the Metropolitan Transportation Authority hired its own security consultant who found they would not make the area more prone to terrorist attacks.

[20][21] South of this station, there are two center stub tracks ending at bumper blocks used for laying-up and relaying trains.

[46][47] The station originally had red tile bands, similar to those used on the Independent Subway System.

[51] Two more street stairs go up to the southwestern corner of the same intersection and lie outside of the New York Stock Exchange Building (NYSE).

After the September 11 attacks in 2001, the stair facing away from Wall Street was closed off by the New York City Police Department, which had instituted a security zone around the NYSE.

[53] In 2019, the MTA again proposed permanently closing and removing the stairways to allow the NYSE to improve the streetscape just outside the building.

[51] The southbound platform has turnstiles that were originally HEET access, but were converted to exit-only following the elimination of through service at this station.

There is another exit-only staircase at the station leading to the northwestern corner of Broad Street and Exchange Place.

It was previously closed by the New York City Police Department as well, but was reopened when security zone was reorganized.

[55] Halfway through the passage, a short staircase from the west side leads up to a narrower passageway that runs through the basement of the Equitable Building before two offset High Entrance/Exit Turnstiles provide entrance to the Wall Street/Broadway station.

[51] Inside fare control, the passage splits in half with each branch leading to either side platform of Wall Street.