Want · Office
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
Near subwayHigh ceilings
Owners: got a fit?I have a fit
Office building with commercial space · Union Square, Manhattan
101 Fifth Avenue
New York, NY 10003
101 Fifth Avenue is an 11-floor office building with commercial space in Union Square, Manhattan, built in 1909, with about 55,000 square feet of office space according to city records.
Also at 99-101 Fifth Avenue.
- Office space
- 55K SF
- Floors
- 11
- Year built
- 1909
- Zoning
- C6-4M
The 38th largest of the 41 office buildings we track in Union Square. Compare it with 6 neighbors
No space at 101 Fifth Avenue 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
How 101 Fifth Avenue compares
Next to the 6 nearest large office buildings, all within a 1 minute walk, 101 Fifth Avenue ranks 6th of 7 by office floor area. Built in 1909, it is the newest of them. Its estimated property tax, about $25.78 a square foot of floor area before abatements, is above the neighbors' median of $18.78.
| Building | Office space | Floors | Built | Tax / SF |
|---|---|---|---|---|
| 101 Fifth Avenue | 55K SF | 11 | 1909 | $25.78 |
| 118 Fifth Avenue | 60K SF | 11 | 1906 | $15.78 |
| 126 Fifth Avenue | 74K SF | 15 | 1906 | $10.66 |
| 87 Fifth Avenue | 51K SF | 11 | 1902 | $21.77 |
| Constable Building, 109 Fifth Avenue | 189K SF | 13 | 1895 | $24.47 |
| 122 Fifth Avenue | 223K SF | 11 | 1900 | $30.22 |
| Annin Building, 85 Fifth Avenue | 95K SF | 13 | 1901 | $14.04 |
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
Building facts
- Other address
- 99-101 Fifth Avenue
- ZIP code
- 10003
- Building type
- Office building with commercial space (city class O6)
- Total floor area
- 71,985 SF
- Commercial floor area
- 71,985 SF
- Office
- 55,405 SF
- Retail
- 16,580 SF
- Height
- 11 floors
- Average floor
- About 6,500 SF (floor area divided by floors)
- Year built
- 1909
- Last major alteration
- 1985
- Lot area
- 5,900 SF
- Zoning district
- C6-4M
- Built FAR
- 12.2
- Max commercial FAR
- 10
- Historic district
- Ladies' Mile Historic District
- Tax lot (BBL)
- 1008460002
Nearest subway
- 14 St-Union Sq
- 14 St
- 23 St
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)
Storefronts and vacancy
Owners registered one storefront at 101 Fifth Avenue for December 31, 2024, the newest annual filing the city has published, and it was not vacant that day.
- Storefronts registered for December 31, 2024
- 1
- Vacant that day
- 0
- Share vacant across Union Square
- 10.6%
- Share vacant along Fifth Avenue
- 12.6%
- Share vacant citywide
- 8.7%
Vacant on December 31, by year
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, 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
Owner, property tax and assessed value
The Department of Finance lists 101 ASH LLC as the owner of record. For tax year 2026/27 the city values 101 Fifth Avenue at $39.1 million and assesses it at $17.6 million. After phase-ins and exemptions its taxable value is $17.1 million; at the Class 4 rate of 10.848% (tax year 2025/26, the latest rate the Department of Finance lists) that comes to about $1.86 million a year before abatements, roughly $25.78 per square foot of floor area. Commercial leases here often pass a tenant's share of tax increases over a base year through as additional rent.
- Owner of record
- 101 ASH LLC
- Tax class
- Class 4 (commercial and industrial)
- City market value
- $39,128,000
- Land market value
- $7,500,000
- Assessed value
- $17,607,600
- Taxable value (phased in)
- $17,106,580
- Estimated yearly tax
- About $1.86 million
- Tax per SF of floor area
- About $25.78
City market value by tax year
Source: NYC Department of Finance, Property Valuation and Assessment Data (2026/27 roll; owner names as the roll records them, which cuts some long names short), pulled 2026-10-02; tax rate from the Department of Finance tax rates page, checked 2026-09-28. The estimate is the taxable value times the class rate. It leaves out abatements, payment-in-lieu-of-taxes agreements and charges, so the actual bill can differ.
NYC energy benchmarking (Local Law 84)
Energy score, grade and emissions
101 Fifth Avenue reported an ENERGY STAR score of 60 out of 100 for 2024 in its Local Law 84 benchmarking filing. Under Local Law 33 that score earns a C (55 to 69). Its site energy use came to 64 kBtu per square foot, 13% below the national median of 73.9 for a similar property. Its greenhouse gas emissions were about 486 metric tons of CO2e (6.74 kg per square foot).
- ENERGY STAR score (2024)
- 60 of 100
- Grade this score earns (Local Law 33)
- C (55 to 69)
- Property type (Portfolio Manager)
- Office
- Site energy use intensity
- 64 kBtu/SF
- National median for the type
- 73.9 kBtu/SF
- Greenhouse gas emissions
- 486 t CO2e
- Emissions per SF
- 6.74 kg CO2e
- Floor area in the filing
- 71,985 SF
ENERGY STAR score by year
Energy sources in 2024
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
Work permits and build-outs
The Department of Buildings issued no permits for new jobs at 101 Fifth Avenue in the 12 months to September 2026; the last one was first permitted in May 2025. A sidewalk shed permit here is active until October 18, 2026.
- New jobs, last 12 months
- 0
- Initial permits, last 12 months
- 1
- Newest job first permitted
- May 2025
- Interior build-outs, last 24 months
- 0
- Sidewalk shed permit
- Active until Oct 18, 2026
New jobs by year
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
Architecture and history
101 Fifth Avenue was designed by Mulliken & Moeller and built in 1908-1909 in the neo-Renaissance style. It stands in the Ladies' Mile Historic District, so exterior changes and new signage go through the Landmarks Preservation Commission.
- Architect
- Mulliken & Moeller
- Constructed
- 1908-1909
- Style
- neo-Renaissance
- Primary material
- Brick
- Built as
- Store and lofts
Source: NYC Landmarks Preservation Commission, 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.
Office space nearby in Union Square
Nothing is listed nearby yet. The labeled examples below show how a space appears; they are not on the market.
What a requirement here looks like
No live requirements for office space in Union Square yet. These labeled examples show what tenants post. List a space in 101 Fifth Avenue and we match it against every new one automatically.
Before you sign
Plain-English guides to square footage, rent and lease terms in New York, and free calculators to run your own numbers.
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Commercial Rent Tax calculator
Whether a Manhattan lease owes the city's Commercial Rent Tax, and roughly how much a year.
Questions about 101 Fifth Avenue
How big is 101 Fifth Avenue?
101 Fifth Avenue has about 72,000 square feet of floor area in total, including 55,000 square feet of office and 17,000 square feet of retail, according to NYC PLUTO 26v2. These are the city's estimates for the whole building, not space that is available.
When was 101 Fifth Avenue built?
The Landmarks Preservation Commission's building records date 101 Fifth Avenue to 1908-1909, designed by Mulliken & Moeller. The building is 11 floors tall.
Who designed 101 Fifth Avenue?
Mulliken & Moeller, according to the Landmarks Preservation Commission's building records, which list the style as neo-Renaissance and its original use as store and lofts.
What other addresses does 101 Fifth Avenue have?
City records list 99-101 Fifth Avenue on the same tax lot (BBL 1008460002) as 101 Fifth Avenue. A space listed on Leasemark at any of these addresses shows up on this page.
What is the ZIP code of 101 Fifth Avenue?
101 Fifth Avenue 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 101 Fifth Avenue, New York, NY 10003, in Union Square.
What is the zoning at 101 Fifth Avenue?
The lot is in the C6-4M zoning district. PLUTO lists a built floor area ratio (FAR) of 12.2 and a maximum commercial FAR of 10 for this lot. It is inside the Ladies' Mile Historic District, so exterior changes go through the Landmarks Preservation Commission.
What subway station is closest to 101 Fifth Avenue?
The closest subway station to 101 Fifth Avenue is 14 St-Union Sq (the 4, 5, 6, L, N, Q, R and W trains), about 900 feet away in a straight line, roughly 3 minutes 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), 5 min walk; 23 St (the R and W trains), 5 min walk. Walking times are straight-line estimates; the street route is longer.
Who owns 101 Fifth Avenue?
The NYC Department of Finance's 2026/27 assessment roll lists 101 ASH LLC as the owner of record of 101 Fifth Avenue (BBL 1008460002). 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.
What is the energy grade of 101 Fifth Avenue?
101 Fifth Avenue reported an ENERGY STAR score of 60 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 60 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 64 kBtu per square foot, 13% below the national median of 73.9 for a similar property. Its greenhouse gas emissions were about 486 metric tons of CO2e (6.74 kg per square foot).
Is there construction at 101 Fifth Avenue?
The Department of Buildings issued no permits for new jobs at 101 Fifth Avenue in the 12 months to September 2026; the last one was first permitted in May 2025. A sidewalk shed permit here is active until October 18, 2026. These are the Department of Buildings' DOB NOW work permits for tax lot 1008460002. A permit is approval to do the work; it does not say who the work is for or whether it is finished.
What are the property taxes at 101 Fifth Avenue?
The Department of Finance's 2026/27 assessment roll lists a taxable value of $17.1 million for 101 Fifth Avenue. At the Class 4 rate of 10.848% (tax year 2025/26, the latest rate the Department of Finance lists), that is about $1.86 million a year, roughly $25.78 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1008460002 show the actual bill.
What is the assessed value of 101 Fifth Avenue?
For tax year 2026/27, the NYC Department of Finance puts the market value of 101 Fifth Avenue at $39.1 million ($7.5 million of it land) and its assessed value at $17.6 million, the 45% of market value the city assesses for Class 4 property. The city's market value fell 6% from 2022/23 ($41.8 million) to 2026/27.
Are there vacant storefronts at 101 Fifth Avenue?
Owners registered one storefront at 101 Fifth Avenue 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.
Is there office space for lease at 101 Fifth Avenue?
No space at 101 Fifth 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.
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Union Square
Transit hubs in Union Square
- 4 5 6 L N Q R W at 14 St-Union Sq