1 Madison Avenue

1 Madison Avenue has about 1.2 million square feet of floor area in total, including 1.2 million square feet of office and 38,000 square feet of retail, according to NYC PLUTO 26v2. These are the city's estimates for the whole building, not space that is available.

City records list 1932 as the year built, with a major alteration recorded in 2020. The building is 26 floors tall.

City records list 1-33 East 23rd Street, 4-24 East 24th Street, 1-3 Madison Avenue and 308-320 Park Avenue South on the same tax lot (BBL 1008530002) as 1 Madison Avenue. A space listed on Leasemark at any of these addresses shows up on this page.

1 Madison 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 full mailing address is 1 Madison Avenue, New York, NY 10010, in Flatiron.

The lot is in the C5-3 zoning district. PLUTO lists a built floor area ratio (FAR) of 15.9 and a maximum commercial FAR of 15 for this lot.

The closest subway station to 1 Madison Avenue is 23 St-Baruch College (the 6 train), about 350 feet away in a straight line, roughly 1 minute on foot. The MTA lists it as an accessible station. Also nearby: 23 St (the R and W trains), 3 min walk; 28 St (the 6 train), 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 1 MADISON OFFICE FEE LLC as the owner of record of 1 Madison Avenue (BBL 1008530002). 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.

Leasemark does not have the building's tenant roster, but SEC filings name companies with offices at 1 Madison Avenue. 5 public companies report the address as their principal executive office: COINBASE GLOBAL, INC. (COIN); FRANKLIN BSP CAPITAL CORP (FRBP); FRANKLIN BSP REALTY TRUST, INC. (FBRT); FBRED-C FEEDER REIT TRUST; and FRANKLIN BSP REAL ESTATE DEBT, INC.. 5 investment managers and funds file 13F holdings reports from the address, including Benefit Street Partners LLC; Clearbridge Investments, LLC; and FIDUCIARY TRUST CO INTERNATIONAL. Private companies do not file with the SEC, so the full list of tenants is longer, and a company can also report a building it owns.

1 Madison Avenue's 2024 Local Law 84 benchmarking filing got no ENERGY STAR score, and Local Law 33 letter grades come from that score, so the filing does not yield an A to D grade. Its site energy use came to 47.3 kBtu per square foot, about the same as the national median of 45.7 for a similar property. Its greenhouse gas emissions were about 6,727 metric tons of CO2e (5.02 kg per square foot).

At its 2024 energy use, 1 Madison Avenue comes to about 5,078 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 10,157 tons for 2024 to 2029 (50% of the limit), so it would owe no penalty. From 2030 the limit drops to 3,606 tons and the same energy use counts as about 2,790 tons, still under the limit. This is an estimate from the owner's 2024 benchmarking filing using the coefficients and per-use limits in the law and the Department of Buildings rule, at $268 per ton over. It is not the building's Local Law 97 report, which can count credits and deductions this estimate cannot.

In the 12 months to October 2026, the Department of Buildings issued first permits for 26 jobs at 1 Madison Avenue. In the last two years, interior work was permitted on 16 floors (floors 1 to 4, 6 to 11, 20, 22 to 24, 26 and 27, the cellar, the mezzanine, the sub-cellar and the underground). The newest build-out, on floor 4, was first permitted in October 2026 (construction, mechanical; filed cost estimate $15 million). These are the Department of Buildings' DOB NOW work permits for tax lot 1008530002. 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 $312.2 million for 1 Madison Avenue. At the Class 4 rate of 10.848% (tax year 2025/26, the latest rate the Department of Finance lists), that is about $33.9 million a year, roughly $27.46 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1008530002 show the actual bill.

For tax year 2026/27, the NYC Department of Finance puts the market value of 1 Madison Avenue at $693.8 million ($40 million of it land) and its assessed value at $312.2 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 301% from 2022/23 ($172.9 million) to 2026/27.

Owners registered 9 storefronts at 1 Madison Avenue for December 31, 2025, the newest annual filing the city has published, and 2 of them stood vacant that day. These are the owners' filings with the Department of Finance under Local Law 157, so a storefront vacant on December 31, 2025 may have been leased since. Owners and brokers can list a storefront on Leasemark for free.

No space at 1 Madison 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.