600 Third Avenue

600 Third Avenue has about 494,000 square feet of floor area in total, including 484,000 square feet of office and 10,000 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 1970 as the year built. The building is 42 floors tall.

City records list 159-165 East 39th Street, 150-152 East 40th Street and 600-618 Third Avenue on the same tax lot (BBL 1008950045) as 600 Third Avenue. A space listed on Leasemark at any of these addresses shows up on this page.

600 Third Avenue is in ZIP code 10016, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The full mailing address is 600 Third Avenue, New York, NY 10016, in Murray Hill.

The lot is in the C5-3 zoning district. PLUTO lists a built floor area ratio (FAR) of 20.02 and a maximum commercial FAR of 15 for this lot.

The closest subway station to 600 Third Avenue is Grand Central-42 St (the 4, 5, 6, 7 and S trains), about 750 feet away in a straight line, roughly 3 minutes on foot. The MTA lists it as an accessible station. Also nearby: 33 St (the 6 train), 8 min walk; 5 Av (the 7, B, D, F and M trains, connected to 42 St-Bryant Pk), 9 min walk. Walking times are straight-line estimates; the street route is longer.

The NYC Department of Finance's 2026/27 assessment roll lists THIRD AVENUE TOWER OWNER, LLC as the owner of record of 600 Third Avenue (BBL 1008950045). 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 600 Third Avenue. 3 public companies report the address as their principal executive office: DIGITAL BRAND MEDIA & MARKETING GROUP, INC. (DBMM); GEMINI SPACE STATION, INC. (GEMI); and INTERNATIONAL SEAWAYS, INC. (INSW). One investment manager files 13F holdings reports from the address: Sio Capital 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.

600 Third Avenue last sold in October 2006 for $315 million, according to the deed recorded with the city. 600 THIRD AVENUE OWNER LLC sold it to THIRD AVENUE TOWER OWNER, LLC. That comes to about $638 per square foot of floor area. The deed is ACRIS document 2006100600459001 (BBL 1008950045) 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.

600 Third Avenue reported an ENERGY STAR score of 65 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 65 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 78.4 kBtu per square foot, 18% below the national median of 96.1 for a similar property. Its greenhouse gas emissions were about 3,794 metric tons of CO2e (7.14 kg per square foot).

At its 2024 energy use, 600 Third Avenue comes to about 2,724 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 4,121 tons for 2024 to 2029 (66% of the limit), so it would owe no penalty. From 2030 the limit drops to 1,485 tons and the same energy use counts as about 1,792 tons, about 307 tons over, or an estimated $82,000 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 600 Third Avenue. In the last two years, interior work was permitted on 7 floors (floors 1, 7, 9, 20, 21, 24 and 31, the basement, the cellar, the ground floor and the sub-cellar). The newest build-out, on floor 1, was first permitted in September 2026 (construction, mechanical, plumbing; filed cost estimate $205,000). These are the Department of Buildings' DOB NOW work permits for tax lot 1008950045. 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 $81.9 million for 600 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 $8.89 million a year, roughly $18.00 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1008950045 show the actual bill.

For tax year 2026/27, the NYC Department of Finance puts the market value of 600 Third Avenue at $184.5 million ($65 million of it land) and its assessed value at $83 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 10% from 2022/23 ($168.1 million) to 2026/27.

Owners registered 5 storefronts at 600 Third Avenue for December 31, 2025, the newest annual filing the city has published, and none stood vacant that day. A year earlier, 1 of 5 stood vacant. 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 600 Third 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.