The Bennett Building is a cast-iron building in the Financial District of Lower Manhattan in New York City, United States. The building is on the western side of Nassau Street, spanning the entire block from Fulton Street to Ann Street. While the Bennett Building contains a primary address of 93-99 Nassau Street, it also has entrances at 139 Fulton Street and 30 Ann Street.

The building was designed by Arthur D. Gilman in the French Second Empire style, with expansions by James M. Farnsworth that closely followed Gilman's original design. The Bennett Building contains a fully realized cast-iron facade, the largest known such example in the world, and is one of two remaining Second Empire-style office buildings south of Canal Street with cast-iron faces. The building's three fully designed facades face Fulton, Nassau, and Ann Streets, while the fourth side faces an adjacent property and is made of plain brick.

The building's namesake was James Gordon Bennett Jr., who commissioned the project as an investment. The original structure designed by Gilman was seven stories tall, including a mansard roof. Real estate investor John Pettit bought the building in 1889, and he hired Farnsworth to design two expansions. The original mansard roof was demolished to allow the addition of the top four stories between 1890 and 1892, while an eleven-story annex was erected on Ann Street in 1894. After Pettit disappeared in 1898, ownership of the Bennett Building passed to several other companies and individuals, who made minor modifications to the building. In 1995, the New York City Landmarks Preservation Commission designated the building a New York City landmark. The Bennett Building is also a contributing property to the Fulton–Nassau Historic District, a National Register of Historic Places district created in 2005.

Site The Bennett Building is located in the Financial District of Lower Manhattan in New York City, United States. The building faces Nassau Street to the east, Fulton Street to the south, and Ann Street to the north. Having frontage on all three streets, it has three street addresses: a primary address at 93-99 Nassau Street, as well as alternate addresses at 139 Fulton Street and 30 Ann Street. Nearby buildings include the Fulton Center to the west; the Keuffel and Esser Company Building to the southeast; 5 Beekman Street and the Park Row Building to the north; and St. Paul's Chapel to the west. A staircase to the New York City Subway's Fulton Street station (served by the ) is outside the Bennett Building's southern facade.

The Bennett Building's plot is L-shaped, measuring about on Fulton Street, on Nassau Street, and on Ann Street. According to the New York City Department of City Planning, the lot covers . When built, the Bennett Building occupied a smaller lot, quoted as being on Nassau Street, on Fulton and Ann Streets, and on the western lot line. The annex has a frontage of about on Ann Street and is deep.

Architecture The Bennett Building is a cast-iron loft building designed in the French Second Empire style. It contains ten full stories as well as a two-story penthouse. The Bennett Building was originally seven stories, with the top story as a mansard roof. The original section was designed by Arthur D. Gilman and is the only remaining building in Manhattan that he designed. The mansard was a characteristic of the Second Empire style, but the cast-iron facade was a new design at the time of its completion. The top three floors and penthouse was added in 1890–1892, and an 11-story extension of the building on Ann Street was added in 1894, both to designs by James M. Farnsworth. Both of Farnsworth's additions carefully followed Gilman's original design. The Bennett Building is largely a commercial and office building, with 159 units, seven of which are residential.

With a height of , the Bennett Building was described in The New York Times as being probably the world's tallest building with a fully cast-iron facade. At the time of construction, most cast-iron buildings were no more than six stories high, and relatively few were expanded upward after their completion. The Bennett Building is also one of two remaining Second Empire office buildings in Manhattan south of Canal Street with a cast-iron facade, the other being 287 Broadway. Although there are other cast-iron buildings from the same era south of Canal Street, such as the Cary Building and 90–94 Maiden Lane, they were used for other purposes, mainly mercantile.

Facade The three facades contain paneled vertical pilasters, segmental-arched windows, and cornices. The facade is split into eight bays on Fulton Street, twelve bays on Nassau Street, and eleven bays on Ann Street, as well as two bays at the northeastern and southeastern corners. The corners were originally framed with corner pavilions, and the ground floor was originally designed as a raised basement. Like cast-iron contemporaries, the Bennett Building contains several repeating sections on its facade, but unlike similar buildings, the columns are not stacked atop each other.

At ground level, there were originally four entrances: one on either end of the Nassau Street side, as well as one each on the western ends of the Fulton and Ann Street sides. The original entrances were decorated with columns and entablatures, which originally supported round arches. The Nassau Street entrances were one bay wide, within the third and tenth bays from south to north, while the Fulton and Ann Street entrances were two bays wide, spanning the seventh and eighth bays from east to west. Following renovations in the 1980s, the Bennett Building has three entrances: a main entrance on Fulton Street (east of the original entrance arch there), a second-story entrance on the southern portion of the Nassau Street side, and a freight entrance on Ann Street. The ground story was initially designed as a raised basement, with each bay separated by cast-iron rusticated vertical piers. The Ann Street facade is still designed in this way, but the Fulton and Nassau Street sides are recessed behind storefronts.

The Bennett Building's facade above the ground floor consists of bays separated by paneled pilasters; projecting cornices with moldings above each floor; arched door and window openings; and scrolled corbels flanking the window openings. Large projecting pilasters flank the corner bays, the original entrance bays on Fulton and Ann Street, and the easternmost two bays on Fulton and Ann Streets. Near the top of each window frame, there are molded labels on each pilaster. A entablature with dentils and a parapet runs above the tenth floor. The three westernmost bays on Ann Street are part of the 1894 annex. They are designed nearly identically to the rest of the facade, with minor differences in decorative detailing, and rise eleven stories instead of ten. The western facade of the building and the twelfth-story penthouse are designed in plain brick and faces a small light court rising above the first story.

Features The lowest six stories of the original structure on Fulton and Ann Streets are load-bearing walls, while the Nassau Street side is a non-bearing curtain wall. The top four stories, the penthouses, and the front wall of the Ann Street annex are also non-bearing walls, as these sections were built with cage construction. At the time of the Bennett Building's construction, cast-iron was typically used for a single curtain wall, and most cast iron buildings were five to six stories high. Structures at corners such as the E. V. Haughwout Building could use cast-iron for two walls, one being a bearing wall and another being a non-bearing wall.

Records from the New York City Department of Buildings reported that the interior structure of the original building was made of timber. Architectural writers Sarah Landau and Carl Condit, however, stated that timber girders would have been unusual for a building as large and prominent as the Bennett Building was. Landau and Condit's observations found that the floors were instead carried on brick arches, set between wrought-iron beams, whose centers were spaced apart. The beams, in turn, rested on cast-iron brackets attached to the building's brick partition walls.

According to an 1873 advertisement in the New York Herald (whose owner James Gordon Bennett Jr. had developed the Bennett Building), the structure's offices ranged from small "cubicles" to relatively large spaces measuring . The Herald advertisement indicated that the building had a $125,000 rent roll per year, with rent rolls on the upper floors being progressively lower than on the lower floors, except for the ground-floor storefronts. The building was meant to attract insurance, mercantile, brokerage, and legal firms at the first floor, and bank and insurance company offices on the second floor. The Bennett Building was built with two elevators and two stairs. The elevators reportedly ran at a then-unprecedented speed of , but their precise location is unclear. When the building was completed, elevator technology was still relatively new, which was one possible reason for why the rent roll was smaller on the upper floors. The building had steam heating from the outset, and after the advent of electric lighting, its owners added a generating plant. History James Gordon Bennett Sr. founded the New York Herald in 1835, and within ten years, it become one of the United States' most profitable newspapers. After moving the Herald multiple times in its first decade, Bennett Sr. bought the northwest-corner lot at Fulton and Nassau Streets in 1843. He eventually owned all the buildings at 135–139 Fulton Street, 30–34 Ann Street, and 93–99 Nassau Street. After the burning of the adjacent Barnum's American Museum at Broadway and Ann Street in 1865, Bennett Sr. hired Kellum & Son to build a fireproof structure for the Herald on the Barnum's site, completed in 1866. At the time, residential buildings in the area were being replaced by commercial developments. These tended to be fireproof structures of between four and six stories, utilizing the most advanced technology available at the time, such as elevators. Furthermore, Nassau Street had become one of New York City's busiest areas for office workers by the 1870s.

Construction and early years Bennett Sr. turned over control of the Herald to his son James Bennett Jr. in April 1867. Bennett Jr. commissioned Gilman to design a new building to replace the Herald old headquarters at Fulton and Nassau Streets, to replace several smaller buildings at that site. Gilman filed building plans several days after Bennett Sr. died in June 1872. Gilman proposed constructing a cast-iron building with seven stories, the top story being located within a mansard roof, with then-modern features such as fireproofing and elevators. The fireproof features were a precautionary measure added after the Great Chicago Fire in 1871 and the Great Boston Fire of 1872. The building was ready to receive its first tenants by May 1873. Among these early tenants was a private bank named L.S. Lawrence & Company, which was involved in currency exchange and collections. At the time of its completion, it was one of New York City's tallest buildings, towering over other structures on Nassau Street.