950 Third Avenue

950 Third Avenue has about 313,000 square feet of floor area in total, including 308,000 square feet of office and 5,000 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 1977 as the year built, with a major alteration recorded in 1989. The building is 32 floors tall.

City records list 156-158 East 57th Street and 944-950 Third Avenue on the same tax lot (BBL 1013110040) as 950 Third Avenue. A space listed on Leasemark at any of these addresses shows up on this page.

950 Third 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 950 Third Avenue, New York, NY 10022, in Midtown.

The lot is in the C5-2 zoning district. PLUTO lists a built floor area ratio (FAR) of 25.7 and a maximum commercial FAR of 10 for this lot.

The closest subway station to 950 Third Avenue is 59 St (the 4, 5, 6, N, R and W trains, connected to Lexington Av/59 St), about 850 feet away in a straight line, roughly 3 minutes on foot. Also nearby: Lexington Av/53 St (the E, F and 6 trains, connected to 51 St), 4 min walk; Lexington Av/63 St (the M and Q trains), 6 min walk. Walking times are straight-line estimates; the street route is longer.

The NYC Department of Finance's 2026/27 assessment roll lists 950 THIRD AVENUE LLC as the owner of record of 950 Third Avenue (BBL 1013110040). 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 950 Third Avenue. One investment manager files 13F holdings reports from the address: Mountaineer Partners Management, LLC. 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.

950 Third Avenue last sold in March 2012 for $15.8 million, according to the deed recorded with the city. The buyer of record was 950 THIRD AVENUE LLC. That comes to about $50 per square foot of floor area. The deed is ACRIS document 2012032800316001 (BBL 1013110040) 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.

950 Third Avenue reported an ENERGY STAR score of 46 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 46 earns a D. 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 113.4 kBtu per square foot, about the same as the national median of 108.3 for a similar property. Its greenhouse gas emissions were about 2,982 metric tons of CO2e (9.3 kg per square foot).

At its 2024 energy use, 950 Third Avenue comes to about 2,097 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 2,430 tons for 2024 to 2029 (86% of the limit), so it would owe no penalty. From 2030 the limit drops to 856 tons and the same energy use counts as about 1,563 tons, about 707 tons over, or an estimated $189,000 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 6 jobs at 950 Third Avenue. In the last two years, interior work was permitted on 8 floors (floors 1, 5, 14, 15, 21, 23, 24 and 32). The newest build-out, on floor 5, was first permitted in October 2026 (mechanical, plumbing, sprinklers; filed cost estimate $32,000). These are the Department of Buildings' DOB NOW work permits for tax lot 1013110040. 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 $33.5 million for 950 Third Avenue. At the Class 4 rate of 10.848% (tax year 2025/26, the latest rate the Department of Finance lists), that is about $3.63 million a year, roughly $11.60 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1013110040 show the actual bill.

For tax year 2026/27, the NYC Department of Finance puts the market value of 950 Third Avenue at $74.4 million ($20.6 million of it land) and its assessed value at $33.5 million, the 45% of market value the city assesses for Class 4 property. The city's market value fell 12% from 2022/23 ($84.6 million) to 2026/27.

Owners registered one storefront at 950 Third Avenue for December 31, 2025, the newest annual filing the city has published, and it was not vacant that day. These are the owners' filings with the Department of Finance under Local Law 157, so a storefront may have come free since. Owners and brokers can list a storefront on Leasemark for free.

No space at 950 Third 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.