645 Madison Avenue

645 Madison Avenue has about 165,000 square feet of floor area in total, including 131,000 square feet of office and 34,000 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 1971 as the year built. The building is 22 floors tall.

City records list 18 East 60th Street and 645-651 Madison Avenue on the same tax lot (BBL 1013740049) as 645 Madison Avenue. A space listed on Leasemark at any of these addresses shows up on this page.

645 Madison Avenue is in ZIP code 10022, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The full mailing address is 645 Madison Avenue, New York, NY 10022, in Midtown.

The lot is in the C5-3 zoning district. PLUTO lists a built floor area ratio (FAR) of 18.21 and a maximum commercial FAR of 15 for this lot.

The closest subway station to 645 Madison Avenue is 5 Av/59 St (the N, R and W trains), about 750 feet away in a straight line, roughly 3 minutes on foot. Also nearby: 59 St (the 4, 5, 6, N, R and W trains, connected to Lexington Av/59 St), 4 min walk; Lexington Av/63 St (the M and Q trains), 5 min walk. Walking times are straight-line estimates; the street route is longer.

The NYC Department of Finance's 2026/27 assessment roll lists TITAN GOLDEN PROPERTY INVESTOR LLC as the owner of record of 645 Madison Avenue (BBL 1013740049). 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 645 Madison Avenue. 3 investment managers and funds file 13F holdings reports from the address: Arrow Capital Management, LLC; BASSWOOD CAPITAL MANAGEMENT, L.L.C.; and Honeycomb Asset Management LP. 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.

645 Madison Avenue last sold in April 2022 for $196.6 million, according to the deed recorded with the city. 645 MADISON PROPERTIES LLC and BLR MADISON LLC sold it to TITAN GOLDEN PROPERTY INVESTOR LLC. That comes to about $1,194 per square foot of floor area. The deed is ACRIS document 2022050600073001 (BBL 1013740049) in the city's property records. A sale of the company that owns a building is not recorded as a deed, so it would not show there.

645 Madison Avenue reported an ENERGY STAR score of 66 for calendar year 2024 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 66 earns a C. 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 65.4 kBtu per square foot, 20% below the national median of 81.6 for a similar property. Its greenhouse gas emissions were about 1,092 metric tons of CO2e (6.63 kg per square foot).

At its 2024 energy use, 645 Madison Avenue comes to about 792 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 1,248 tons for 2024 to 2029 (63% of the limit), so it would owe no penalty. From 2030 the limit drops to 443 tons and the same energy use counts as about 460 tons, about 17 tons over, or an estimated $4,500 a year unless the building cuts its emissions. 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 10 jobs at 645 Madison Avenue. In the last two years, interior work was permitted on 7 floors (floors 1 to 4, 16, 18 and 21). The newest build-out, on floor 21, was first permitted in July 2026 (construction; filed cost estimate $150,000). These are the Department of Buildings' DOB NOW work permits for tax lot 1013740049. 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 $47.5 million for 645 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 $5.16 million a year, roughly $31.33 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1013740049 show the actual bill.

For tax year 2026/27, the NYC Department of Finance puts the market value of 645 Madison Avenue at $110.5 million ($40.5 million of it land) and its assessed value at $49.7 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 12% from 2022/23 ($98.5 million) to 2026/27.

No space at 645 Madison Avenue is listed on Leasemark right now. Nearby on Leasemark: office space for lease at 783 Madison 4th Floor in the Upper East Side (994 SF, $66.40/SF/yr). Owners and brokers can list space here for free, and tenants can post a requirement to be matched when space opens up.