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 · Flatiron, Manhattan
12 West 21st Street
New York, NY 10010
12 West 21st Street is a 12-floor office building with commercial space in Flatiron, Manhattan, built in 1907, with about 50,000 square feet of office space according to city records.
Also at 12-14 West 21st Street.
- Office space
- 50K SF
- Floors
- 12
- Year built
- 1907
- Zoning
- C6-4A
The 74th largest of the 75 office buildings we track in Flatiron. Compare it with 6 neighbors
No space at 12 West 21st 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
How 12 West 21st Street compares
Next to the 6 nearest large office buildings, all within a 1 minute walk, 12 West 21st Street is the smallest by office floor area. It went up in 1907; the median neighbor dates from 1907. Its estimated property tax, about $9.81 a square foot of floor area before abatements, is below the neighbors' median of $11.44.
| Building | Office space | Floors | Built | Tax / SF |
|---|---|---|---|---|
| 12 West 21st Street | 50K SF | 12 | 1907 | $9.81 |
| 22 West 21st Street | 93K SF | 12 | 1908 | $12.10 |
| Spero Building, 19 West 21st Street | 103K SF | 12 | 1908 | $10.78 |
| Mohawk Building, 160 Fifth Avenue | 91K SF | 9 | 1892 | $13.68 |
| Presbyterian Building, 154 Fifth Avenue | 169K SF | 14 | 1895 | $18.96 |
| 15 West 21st Street | 117K SF | 12 | 1910 | $10.52 |
| 30 West 21st Street | 58K SF | 15 | 1907 | $7.99 |
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
- 12-14 West 21st Street
- ZIP code
- 10010
- Building type
- Office building with commercial space (city class O6)
- Total floor area
- 58,900 SF
- Commercial floor area
- 58,900 SF
- Office
- 50,000 SF
- Retail
- 4,200 SF
- Height
- 12 floors
- Average floor
- About 4,900 SF (floor area divided by floors)
- Year built
- 1907
- Last major alteration
- 2012
- Lot area
- 4,646 SF
- Zoning district
- C6-4A
- Built FAR
- 12.68
- Max commercial FAR
- 10
- Historic district
- Ladies' Mile Historic District
- Tax lot (BBL)
- 1008220049
Nearest subway
- 23 St
- 23 St
- 23 St-Baruch College
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 12 West 21st Street 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 Flatiron
- 13.5%
- Share vacant along West 21st Street
- 8.8%
- Share vacant citywide
- 8.7%
Vacant on December 31, by year
Need a storefront in Flatiron? 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 12W21 LAND, L.P. as the owner of record. For tax year 2026/27 the city values 12 West 21st Street at $12.7 million and assesses it at $5.72 million. After phase-ins and exemptions its taxable value is $5.33 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 $577,972 a year before abatements, roughly $9.81 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
- 12W21 LAND, L.P.
- Tax class
- Class 4 (commercial and industrial)
- City market value
- $12,707,000
- Land market value
- $2,220,000
- Assessed value
- $5,718,150
- Taxable value (phased in)
- $5,327,910
- Estimated yearly tax
- About $577,972
- Tax per SF of floor area
- About $9.81
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
12 West 21st Street reported an ENERGY STAR score of 72 out of 100 for 2024 in its Local Law 84 benchmarking filing. Under Local Law 33 that score earns a B (70 to 84). Its site energy use came to 67.3 kBtu per square foot, 27% below the national median of 92.3 for a similar property. Its greenhouse gas emissions were about 378 metric tons of CO2e (6.41 kg per square foot).
- ENERGY STAR score (2024)
- 72 of 100
- Grade this score earns (Local Law 33)
- B (70 to 84)
- Property type (Portfolio Manager)
- Office
- Site energy use intensity
- 67.3 kBtu/SF
- National median for the type
- 92.3 kBtu/SF
- Greenhouse gas emissions
- 378 t CO2e
- Emissions per SF
- 6.41 kg CO2e
- Floor area in the filing
- 58,901 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 12 West 21st Street in the 12 months to September 2026; the last one was first permitted in October 2022.
- New jobs, last 12 months
- 0
- Initial permits, last 12 months
- 0
- Newest job first permitted
- October 2022
- Interior build-outs, last 24 months
- 0
New jobs by year
Build-outs across FlatironWhere 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
12 West 21st Street was designed by Buchman & Fox and built in 1907 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
- Buchman & Fox
- Constructed
- 1907
- Style
- neo-Renaissance
- Primary material
- Buff 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 Flatiron
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 Flatiron yet. These labeled examples show what tenants post. List a space in 12 West 21st Street and we match it against every new one automatically.
Want · Office
Startup seeking furnished sublease
Posted by the tenant · Software
- Where
- Flatiron, Midtown South +1
- Size
- 6,000 to 11,000 SF
- Budget
- to $60/SF
- Move in
- Nov 2026
Furnished
Owners: got a fit?I have a fit
Before you sign
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Questions about 12 West 21st Street
How big is 12 West 21st Street?
12 West 21st Street has about 59,000 square feet of floor area in total, including 50,000 square feet of office and 4,000 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 12 West 21st Street built?
The Landmarks Preservation Commission's building records date 12 West 21st Street to 1907, designed by Buchman & Fox. The building is 12 floors tall.
Who designed 12 West 21st Street?
Buchman & Fox, 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 12 West 21st Street have?
City records list 12-14 West 21st Street on the same tax lot (BBL 1008220049) as 12 West 21st Street. A space listed on Leasemark at any of these addresses shows up on this page.
What is the ZIP code of 12 West 21st Street?
12 West 21st Street is in ZIP code 10010, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The full mailing address is 12 West 21st Street, New York, NY 10010, in Flatiron.
What is the zoning at 12 West 21st Street?
The lot is in the C6-4A zoning district. PLUTO lists a built floor area ratio (FAR) of 12.68 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 12 West 21st Street?
The closest subway station to 12 West 21st Street is 23 St (the R and W trains), about 700 feet away in a straight line, roughly 3 minutes on foot. Also nearby: 23 St (the F and M trains), 4 min walk; 23 St-Baruch College (the 6 train), 5 min walk. Walking times are straight-line estimates; the street route is longer.
Who owns 12 West 21st Street?
The NYC Department of Finance's 2026/27 assessment roll lists 12W21 LAND, L.P. as the owner of record of 12 West 21st Street (BBL 1008220049). 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 12 West 21st Street?
12 West 21st Street reported an ENERGY STAR score of 72 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 72 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 67.3 kBtu per square foot, 27% below the national median of 92.3 for a similar property. Its greenhouse gas emissions were about 378 metric tons of CO2e (6.41 kg per square foot).
Is there construction at 12 West 21st Street?
The Department of Buildings issued no permits for new jobs at 12 West 21st Street in the 12 months to September 2026; the last one was first permitted in October 2022. These are the Department of Buildings' DOB NOW work permits for tax lot 1008220049. 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 12 West 21st Street?
The Department of Finance's 2026/27 assessment roll lists a taxable value of $5.33 million for 12 West 21st Street. At the Class 4 rate of 10.848% (tax year 2025/26, the latest rate the Department of Finance lists), that is about $577,972 a year, roughly $9.81 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1008220049 show the actual bill.
What is the assessed value of 12 West 21st Street?
For tax year 2026/27, the NYC Department of Finance puts the market value of 12 West 21st Street at $12.7 million ($2.22 million of it land) and its assessed value at $5.72 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 17% from 2022/23 ($10.9 million) to 2026/27.
Are there vacant storefronts at 12 West 21st Street?
Owners registered one storefront at 12 West 21st 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.
Is there office space for lease at 12 West 21st Street?
No space at 12 West 21st 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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Flatiron
Transit hubs in Flatiron
- R W at 23 St
- 4 5 6 L N Q R W at 14 St-Union Sq
- F M at 23 St