Series B fintech needs 8,000 to 12,000 SF
Posted by the tenant · Fintech
- Where
- Midtown South, Flatiron +1
- Size
- 8,000 to 12,000 SF
- Budget
- to $85/SF
- Move in
- Jan 2027
Office condominium · Union Square, Manhattan
New York, NY 10003
105 East 17th Street is a 4-floor office condominium in Union Square, Manhattan, built in 1963, with about 91,000 square feet of office space according to city records.
Also at 105-117 East 17th Street and 108-116 East 18th Street.
The 28th largest of the 41 office buildings we track in Union Square. Compare it with 6 neighbors
No space at 105 East 17th Street is listed on Leasemark yet. Own or broker space here? List it free and it is matched against every active requirement the day it goes up, or import a spreadsheet of up to 50 spaces at once.
Compared with its neighbors
Next to the 6 nearest large office buildings, all within a 2 minute walk, 105 East 17th Street ranks 6th of 7 by office floor area. Built in 1963, it is the newest of them. Its property tax is fully exempt on the city's assessment roll.
| Building | Office space | Floors | Built | Tax / SF |
|---|---|---|---|---|
| 105 East 17th Street | 91K SF | 4 | 1963 | Exempt |
| 215 Park Avenue South | 275K SF | 20 | 1910 | $16.60 |
| 225 Park Avenue South | 181K SF | 19 | 1910 | $18.46 |
| 35 Irving Place | 288K SF | 12 | 1909 | $20.56 |
| 233 Park Avenue South | 137K SF | 12 | 1909 | $20.74 |
| Everett Building, 200 Park Avenue South | 224K SF | 16 | 1908 | $23.86 |
| 116 East 16th Street | 52K SF | 12 | 1910 | $11.33 |
Sources: NYC Department of City Planning, PLUTO 26v2 for size, floors and year built; NYC Department of Finance 2026/27 roll for tax (taxable value times the class rate, before abatements, over the whole floor area). Large means at least 50,000 SF of the building's main use. Walking times are straight-line estimates.
NYC tax lot records
Source: NYC Department of City Planning, PLUTO 26v2, pulled 2026-09-30; addresses from the Property Address Directory (PAD) 26b; subway stations from the MTA Subway Stations dataset, pulled 2026-10-02. Floor areas are the city's estimates for the whole building, not available space. Walking times are straight-line estimates. How we build these pages. Something wrong on this page? Tell us.
NYC storefront registry (Local Law 157)
Owners registered one storefront at 105 East 17th Street for December 31, 2024, the newest annual filing the city has published, and it was not vacant that day.
Need a storefront in Union Square? Get matchedStorefront vacancy across New York City
Source: NYC Department of Finance, Storefronts Reported Vacant or Not (Local Law 157), annual filings for 2019 to 2024, pulled 2026-10-02. Owners of buildings with ground- or second-floor storefronts register each one every year with its status on December 31; counts are by tax lot, summed over the condominium's unit lot that filed, as the owners filed them. The 2024 filing was due June 3, 2025, so a storefront vacant then may have been leased since. A vacant storefront is not always on the market, and none here is listed on Leasemark unless it shows above.
NYC Department of Finance records
105 East 17th Street is a condominium of 3 tax lots. 105 EAST 17TH STREET ASSOCIATES LLC owns the units that make up 100% of its market value. For tax year 2026/27 the city values 105 East 17th Street at $58.5 million and assesses it at $26.3 million. Exemptions on the roll cover the whole taxable value, which is common for government, nonprofit and payment-in-lieu-of-taxes properties.
Source: NYC Department of Finance, Property Valuation and Assessment Data (2026/27 roll, summed over 3 condominium tax lots; owner names as the roll records them, which cuts some long names short), pulled 2026-10-02. Exempt properties can still owe charges or payments in lieu of taxes that the roll does not show.
NYC energy benchmarking (Local Law 84)
105 East 17th Street reported an ENERGY STAR score of 96 out of 100 for 2024 in its Local Law 84 benchmarking filing. Under Local Law 33 that score earns an A (85 or higher). Its site energy use came to 39.8 kBtu per square foot, less than half the national median of 110.3 for a similar property. Its greenhouse gas emissions were about 449 metric tons of CO2e (4.11 kg per square foot).
Source: NYC Department of Buildings and Mayor's Office of Climate and Environmental Justice, NYC Building Energy and Water Data Disclosure for Local Law 84 (2024 filing), pulled 2026-10-02; grade cutoffs from the Department of Buildings energy grades page. Figures are as the owner filed them in ENERGY STAR Portfolio Manager. The grade is the one the filed score earns under the law's cutoffs; the Department of Buildings assigns the grade a building posts, which can differ.
NYC Department of Buildings permits
In the 12 months to September 2026, the Department of Buildings issued first permits for 1 job at 105 East 17th Street. In the last two years, interior work was permitted on one floor (floor 4 and the basement). The newest build-out, on floor 4, was first permitted in February 2026 (construction, mechanical; filed cost estimate $28,000).
Build-outs across Union SquareWhere NYC offices are being built out
Source: NYC Department of Buildings, DOB NOW: Build Approved Permits, pulled 2026-10-02 (permits issued through 2026-09-30). A job counts once, when its first permit is issued; renewals are not new work. A build-out groups jobs on the same floors first permitted within 120 days of each other. Costs are the estimates filed with the jobs. Jobs filed before DOB NOW (in the older BIS system) are not counted. A permit is approval to do the work; it does not say who the work is for or whether it is finished.
Landmarks Preservation Commission records
105 East 17th Street was designed by Skidmore, Owings & Merrill (Roger Radford) and built in 1959-1963 in the International Style. The Landmarks Preservation Commission designated Guardian Life Insurance Company of America Annex, on this tax lot, a New York City landmark on November 18, 2008.
Source: NYC Landmarks Preservation Commission, Individual Landmark Sites and Individual Landmark and Historic District Building Database on NYC Open Data, pulled 2026-10-02. A designation can cover part of a lot, such as a facade or a lobby interior.
Nothing is listed nearby yet. The labeled examples below show how a space appears; they are not on the market.
No live requirements for office space in Union Square yet. These labeled examples show what tenants post. List a space in 105 East 17th Street and we match it against every new one automatically.
Posted by the tenant · Fintech
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105 East 17th Street has about 91,000 square feet of floor area in total, including 91,000 square feet of office, according to NYC PLUTO 26v2. These are the city's estimates for the whole building, not space that is available.
The Landmarks Preservation Commission's building records date 105 East 17th Street to 1959-1963, designed by Skidmore, Owings & Merrill (Roger Radford). City tax records list 1960 as the year built. The building is 4 floors tall.
Skidmore, Owings & Merrill (Roger Radford), according to the Landmarks Preservation Commission's building records, which list the style as International Style and its original use as an office building.
The tax lot at 105 East 17th Street includes Guardian Life Insurance Company of America Annex, an individual landmark designated November 18, 2008 (LP-02247). Changes to a designated landmark, including many storefront, window and signage changes, need a permit from the Landmarks Preservation Commission.
City records list 105-117 East 17th Street and 108-116 East 18th Street on the same tax lot (BBL 1008737502) as 105 East 17th Street. A space listed on Leasemark at any of these addresses shows up on this page.
105 East 17th Street 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 105 East 17th Street, New York, NY 10003, in Union Square.
The lot is in the R8B zoning district. PLUTO lists a built floor area ratio (FAR) of 3.17 for this lot.
The closest subway station to 105 East 17th Street is 14 St-Union Sq (the 4, 5, 6, L, N, Q, R and W trains), about 750 feet away in a straight line, roughly 3 minutes on foot. The MTA lists it as an accessible station. Also nearby: 23 St-Baruch College (the 6 train), 5 min walk; 3 Av (the L train), 5 min walk. Walking times are straight-line estimates; the street route is longer.
105 East 17th Street is a condominium of 3 tax lots. 105 EAST 17TH STREET ASSOCIATES LLC owns the units that make up 100% of its market value. That is from the NYC Department of Finance's 2026/27 assessment roll (BBL 1008737502). Deeds and mortgages for each unit are public in ACRIS, the city's property records system.
105 East 17th Street reported an ENERGY STAR score of 96 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 96 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 39.8 kBtu per square foot, less than half the national median of 110.3 for a similar property. Its greenhouse gas emissions were about 449 metric tons of CO2e (4.11 kg per square foot).
In the 12 months to September 2026, the Department of Buildings issued first permits for 1 job at 105 East 17th Street. In the last two years, interior work was permitted on one floor (floor 4 and the basement). The newest build-out, on floor 4, was first permitted in February 2026 (construction, mechanical; filed cost estimate $28,000). These are the Department of Buildings' DOB NOW work permits for tax lot 1008737502. 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 exemptions covering the whole taxable value of 105 East 17th Street (the sum of its 3 condominium tax lots), so there is no property tax on the roll to estimate. That is common for government, nonprofit and payment-in-lieu-of-taxes (PILOT) properties. The city's property tax records for BBL 1008737502 show what is actually billed.
For tax year 2026/27, the NYC Department of Finance puts the market value of 105 East 17th Street at $58.5 million ($23.4 million of it land) and its assessed value at $26.3 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 3% from 2022/23 ($56.6 million) to 2026/27.
Owners registered one storefront at 105 East 17th Street for December 31, 2024, 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 105 East 17th Street 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.
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