666 Third Avenue

666 Third Avenue has about 666,000 square feet of floor area in total, including 633,000 square feet of office and 33,000 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 1952 as the year built, with a major alteration recorded in 2022. The building is 32 floors tall.

City records list 159-163 East 42nd Street, 142-156 East 43rd Street and 660-676 Third Avenue on the same tax lot (BBL 1012970033) as 666 Third Avenue. A space listed on Leasemark at any of these addresses shows up on this page.

666 Third Avenue is in ZIP code 10017, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The full mailing address is 666 Third Avenue, New York, NY 10017, in Grand Central.

The lot is in the C5-3 zoning district. PLUTO lists a built floor area ratio (FAR) of 19.16 and a maximum commercial FAR of 15 for this lot.

The closest subway station to 666 Third Avenue is Grand Central-42 St (the 4, 5, 6, 7 and S trains), about 400 feet away in a straight line, roughly 1 minute on foot. The MTA lists it as an accessible station. Also nearby: 5 Av (the 7, B, D, F and M trains, connected to 42 St-Bryant Pk), 8 min walk; 51 St (the 6, E and F trains, connected to Lexington Av/53 St), 8 min walk. Walking times are straight-line estimates; the street route is longer.

The NYC Department of Finance's 2026/27 assessment roll lists CHRYSLER EAST BUILDING, L.L.C. as the owner of record of 666 Third Avenue (BBL 1012970033). 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 666 Third Avenue. 2 public companies report the address as their principal executive office: STRATA CRITICAL MEDICAL, INC. (SRTA); and GLOBAL BUSINESS TRAVEL GROUP, INC.. 3 investment managers and funds file 13F holdings reports from the address: 2Xideas US Inc., APG Asset Management US Inc. and VAN ECK ASSOCIATES CORP. 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.

666 Third Avenue reported an ENERGY STAR score of 79 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 79 earns a B. 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 56 kBtu per square foot, 36% below the national median of 87.4 for a similar property. Its greenhouse gas emissions were about 4,209 metric tons of CO2e (5.34 kg per square foot).

In the 12 months to October 2026, the Department of Buildings issued first permits for 3 jobs at 666 Third Avenue. In the last two years, interior work was permitted on 9 floors (floors 5, 7, 8, 10, 18 to 20, 23 and 30). The newest build-out, on floor 23, was first permitted in September 2026 (construction, mechanical; filed cost estimate $44,000). These are the Department of Buildings' DOB NOW work permits for tax lot 1012970033. 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 $135.4 million for 666 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 $14.7 million a year, roughly $22.05 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1012970033 show the actual bill.

For tax year 2026/27, the NYC Department of Finance puts the market value of 666 Third Avenue at $302.6 million ($58.3 million of it land) and its assessed value at $136.2 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 27% from 2022/23 ($238.2 million) to 2026/27.

Owners registered 5 storefronts at 666 Third Avenue for December 31, 2025, the newest annual filing the city has published, and none stood 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 666 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.