17 Union Square

17 Union Square has about 88,000 square feet of floor area in total, including 82,000 square feet of office and 6,000 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 1912 as the year built. The building is 12 floors tall.

City records list 25-27 East 15th Street, 17-19 Union Square and 17-19 Union Square West on the same tax lot (BBL 1008430020) as 17 Union Square. A space listed on Leasemark at any of these addresses shows up on this page.

17 Union Square is in ZIP code 10003, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The full mailing address is 17 Union Square, New York, NY 10003, in Union Square.

The lot is in the C6-4 zoning district. PLUTO lists a built floor area ratio (FAR) of 11.79 and a maximum commercial FAR of 10 for this lot.

The closest subway station to 17 Union Square is 14 St-Union Sq (the 4, 5, 6, L, N, Q, R and W trains), about 300 feet away in a straight line, roughly 1 minute on foot. The MTA lists it as an accessible station. Also nearby: 14 St (the 1, 2, 3, F, M and L trains, connected to 6 Av), 6 min walk; 3 Av (the L train), 7 min walk. Walking times are straight-line estimates; the street route is longer.

The NYC Department of Finance's 2026/27 assessment roll lists MERIEL REALTY LLC. as the owner of record of 17 Union Square (BBL 1008430020). 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.

17 Union Square reported an ENERGY STAR score of 91 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 91 earns an A. 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 51.9 kBtu per square foot, less than half the national median of 109.3 for a similar property. Its greenhouse gas emissions were about 518 metric tons of CO2e (5.3 kg per square foot).

In the 12 months to September 2026, the Department of Buildings issued first permits for 2 jobs at 17 Union Square. In the last two years, interior work was permitted on 3 floors (floors 1 to 3 and the cellar). The newest build-out, on floors 1 and 2, was first permitted in August 2026 (structural; filed cost estimate $123,000). These are the Department of Buildings' DOB NOW work permits for tax lot 1008430020. 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 $17 million for 17 Union Square. At the Class 4 rate of 10.848% (tax year 2025/26, the latest rate the Department of Finance lists), that is about $1.85 million a year, roughly $21.08 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1008430020 show the actual bill.

For tax year 2026/27, the NYC Department of Finance puts the market value of 17 Union Square at $40.3 million ($6 million of it land) and its assessed value at $18.1 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 21% from 2022/23 ($33.4 million) to 2026/27.

No space at 17 Union Square 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.