Flatiron Building

The Flatiron Building has about 183,000 square feet of floor area in total, including 175,000 square feet of office and 9,000 square feet of retail, according to NYC PLUTO 26v2. These are the city's estimates for the whole building, not space that is available.

The Landmarks Preservation Commission's building records date the Flatiron Building to 1902-1903, designed by D. H. Burnham & Company (architect), George A. Fuller Co. (bldr). The building is 21 floors tall.

D. H. Burnham & Company (architect), George A. Fuller Co. (bldr), according to the Landmarks Preservation Commission's building records, which list the style as Beaux-Arts and its original use as offices and lofts.

Yes. The Landmarks Preservation Commission designated the Flatiron Building an individual landmark on September 20, 1966 (LP-00219). Changes to a designated landmark, including many storefront, window and signage changes, need a permit from the Commission.

The Flatiron Building is at 171 Fifth Avenue in Flatiron, Manhattan. City records list 941-957 Broadway, 1 East 22nd Street and 171-185 Fifth Avenue on the same tax lot (BBL 1008510001). A space listed on Leasemark at any of these addresses shows up on this page.

171 Fifth Avenue is in ZIP code 10010, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The Flatiron Building is at 171 Fifth Avenue, New York, NY 10010, in Flatiron.

The lot is in the C6-4M zoning district. PLUTO lists a built floor area ratio (FAR) of 21.21 and a maximum commercial FAR of 10 for this lot. It is inside the Ladies' Mile Historic District, so exterior changes go through the Landmarks Preservation Commission.

The closest subway station to the Flatiron Building is 23 St (the R and W trains), about 150 feet away in a straight line, roughly 1 minute on foot. Also nearby: 23 St-Baruch College (the 6 train), 4 min walk; 23 St (the F and M trains), 4 min walk. Walking times are straight-line estimates; the street route is longer.

The NYC Department of Finance's 2026/27 assessment roll lists FLATIRON OWNER LLC as the owner of record of the Flatiron Building (BBL 1008510001). Big buildings are usually held through a company set up for that one property, so the name on the roll can differ from the landlord's brand or the managing agent. Deeds and mortgages for the lot are public in ACRIS, the city's property records system.

The Flatiron Building reported an ENERGY STAR score of 89 for calendar year 2022 in its Local Law 84 benchmarking filing. Under Local Law 33, as amended by Local Law 95 of 2019, a score of 85 or higher earns an A, 70 to 84 a B, 55 to 69 a C and under 55 a D, so 89 earns an A. The Department of Buildings assigns the grade a building posts, so the posted label can differ if a filing was corrected. Its site energy use came to 46.5 kBtu per square foot, 50% below the national median of 92.4 for a similar property. Its greenhouse gas emissions were about 695 metric tons of CO2e (3.6 kg per square foot).

In the 12 months to October 2026, the Department of Buildings issued first permits for 7 jobs at the Flatiron Building. In the last two years, interior work was permitted on 23 floors (floors 1 to 23, the cellar and the sub-cellar). The newest build-out, on floor 12, was first permitted in September 2026 (construction; filed cost estimate $1,000). A sidewalk shed permit here is active until January 21, 2027. These are the Department of Buildings' DOB NOW work permits for tax lot 1008510001. A permit is approval to do the work; it does not say who the work is for or whether it is finished.

The Department of Finance's 2026/27 assessment roll lists a taxable value of $22.8 million for the Flatiron Building. At the Class 4 rate of 10.848% (tax year 2025/26, the latest rate the Department of Finance lists), that is about $2.47 million a year, roughly $13.47 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1008510001 show the actual bill.

For tax year 2026/27, the NYC Department of Finance puts the market value of the Flatiron Building at $52 million ($14 million of it land) and its assessed value at $23.4 million, the 45% of market value the city assesses for Class 4 property. The city's market value fell 17% from 2022/23 ($62.3 million) to 2026/27.

No space at 171 Fifth Avenue is listed on Leasemark right now. Owners and brokers can list space here for free, and tenants can post a requirement to be matched when space opens up.