Office building with commercial space · Flatiron, Manhattan
15 West 21st Street
New York, NY 10010
15 West 21st Street is a 12-floor office building with commercial space in Flatiron, Manhattan, built in 1910, with about 117,000 square feet of office space according to city records.
Also at 15-17 West 21st Street and 16-18 West 22nd Street.
- Office space
- 117K SF
- Floors
- 12
- Year built
- 1910
- Zoning
- C6-4A
The 33rd largest of the 90 office buildings we track in Flatiron. Compare it with 6 neighbors
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Compared with its neighbors
How 15 West 21st Street compares
Next to the 6 nearest large office buildings, all within a 1 minute walk, 15 West 21st Street ranks 2nd of 7 by office floor area. It went up in 1910; the median neighbor dates from 1908. Its estimated property tax, about $10.52 a square foot of floor area before abatements, is close to the neighbors' median of $10.29.
| Building | Office space | Floors | Built | Tax / SF |
|---|---|---|---|---|
| 15 West 21st Street | 117K SF | 12 | 1910 | $10.52 |
| Spero Building, 19 West 21st Street | 103K SF | 12 | 1908 | $10.78 |
| Taylor Building, 20 West 22nd Street | 144K SF | 16 | 1911 | $13.29 |
| 12 West 21st Street | 50K SF | 12 | 1907 | $9.81 |
| 18 West 21st Street | 49K SF | 11 | 1907 | $9.46 |
| 22 West 21st Street | 93K SF | 12 | 1908 | $12.10 |
| 162 Fifth Avenue | 92K SF | 12 | 1930 | $5.65 |
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 35,000 SF of the building's main use. Walking times are straight-line estimates.
NYC tax lot records
Building facts
- Other addresses
- 15-17 West 21st Street; 16-18 West 22nd Street
- ZIP code
- 10010
- Building type
- Office building with commercial space (city class O6)
- Total floor area
- 137,007 SF
- Commercial floor area
- 137,007 SF
- Office
- 117,007 SF
- Retail
- 20,000 SF
- Height
- 12 floors
- Average floor
- About 11,400 SF (floor area divided by floors)
- Year built
- 1910
- Last major alteration
- 1989
- Lot area
- 11,200 SF
- Zoning district
- C6-4A
- Built FAR
- 12.23
- Max commercial FAR
- 10
- Historic district
- Ladies' Mile Historic District
- Tax lot (BBL)
- 1008230029
Nearest subway
- 23 St
- 23 St
- 23 St-Baruch College
Source: NYC Department of City Planning, PLUTO 26v2, pulled 2026-10-16; addresses from the Property Address Directory (PAD) 26b; subway stations from the MTA Subway Stations dataset, pulled 2026-10-16. 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 2 storefronts at 15 West 21st Street for December 31, 2025, the newest annual filing the city has published, and none stood vacant that day.
- Storefronts registered for December 31, 2025
- 2
- Vacant that day
- 0
- Share vacant across Flatiron
- 11.8%
- Share vacant along West 21st Street
- 5.9%
- Share vacant citywide
- 9.2%
Vacant on December 31, by year
Need a storefront in Flatiron? Get matchedNYC storefront vacancy report
Source: NYC Department of Finance, Storefronts Reported Vacant or Not (Local Law 157), annual filings for 2019 to 2025, pulled 2026-10-16. 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 2025 filing was due June 1, 2026, 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 MEYSAR REALTY CORP as the owner of record. For tax year 2026/27 the city values 15 West 21st Street at $31.7 million and assesses it at $14.3 million. After phase-ins and exemptions its taxable value is $13.3 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 $1.44 million a year before abatements, roughly $10.52 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
- MEYSAR REALTY CORP
- Tax class
- Class 4 (commercial and industrial)
- City market value
- $31,685,000
- Land market value
- $3,600,000
- Assessed value
- $14,258,250
- Taxable value (phased in)
- $13,281,300
- Estimated yearly tax
- About $1.44 million
- Tax per SF of floor area
- About $10.52
City market value by tax year
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How to find who owns any NYC buildingSource: 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 2026-10-16; 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.
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NYC energy benchmarking (Local Law 84)
Energy score, grade and emissions
15 West 21st Street reported an ENERGY STAR score of 69 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 82.1 kBtu per square foot, 23% below the national median of 107.1 for a similar property. Its greenhouse gas emissions were about 1,096 metric tons of CO2e (7.02 kg per square foot).
- ENERGY STAR score (2024)
- 69 of 100
- Grade this score earns (Local Law 33)
- C (55 to 69)
- Property type (Portfolio Manager)
- Office
- Site energy use intensity
- 82.1 kBtu/SF
- National median for the type
- 107.1 kBtu/SF
- Greenhouse gas emissions
- 1,096 t CO2e
- Emissions per SF
- 7.02 kg CO2e
- Floor area in the filing
- 156,221 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 2026-10-16; 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.
Local Law 97 of 2019, estimated
Local Law 97 emissions limit
At its 2024 energy use, 15 West 21st Street comes to about 921 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 1,480 tons for 2024 to 2029 (62% of the limit), so it would owe no penalty. From 2030 the limit drops to 526 tons and the same energy use counts as about 678 tons, about 151 tons over, or an estimated $41,000 a year unless the building cuts its emissions.
- Period
- 2024 to 2029
- Emissions limit
- 1,480 t CO2e
- Estimated emissions
- 921 t CO2e
- Under the limit by
- 559 t CO2e
- Estimated penalty a year
- None
- Period
- 2030 to 2034
- Emissions limit
- 526 t CO2e
- Estimated emissions
- 678 t CO2e
- Over the limit by
- 151 t CO2e
- Estimated penalty a year
- $41,000
Estimated from the owner's 2024 Local Law 84 filing, which reports energy by source and floor area by use: Office 138,000 SF; Other - Restaurant/Bar 18,221 SF. It applies the coefficients and per-use limits in Department of Buildings rule 1 RCNY 103-14 and Administrative Code 28-320.3.1.1 (as the Department lists them) and the $268 per ton penalty, checked 2026-10-04. It is not the building's Local Law 97 report: that report can count renewable energy credits, solar and storage deductions and, for 2024 and 2025, the law's occupancy group limits where higher, and penalties can be reduced for good faith efforts.
Change these numbers in the Local Law 97 calculator to see what a cut in energy use would do to the penalty.
How Local Law 97 works: who is covered, the 2030 limits and what owners, tenants and buyers should check.
Own or manage 15 West 21st Street? List a space here free and we match it against every active requirement.
NYC Department of Buildings permits
Work permits and build-outs
In the 12 months to October 2026, the Department of Buildings issued first permits for 3 jobs at 15 West 21st Street. In the last two years, interior work was permitted on 4 floors (floors 2, 4, 7 and 8 and the lobby). The newest build-out, on floor 4, was first permitted in August 2026 (construction, mechanical, plumbing, sprinklers; filed cost estimate $1.3 million).
- New jobs, last 12 months
- 3
- Initial permits, last 12 months
- 6
- Newest job first permitted
- September 2026
- Interior build-outs, last 24 months
- 5
- Floors with interior work, last 24 months
- 2, 4, 7 and 8, lobby
Recent build-outs
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 2026-10-24 (permits issued through 2026-10-22). 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
15 West 21st Street was designed by William Harvey Birkmire and built in 1910 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
- William Harvey Birkmire
- Constructed
- 1910
- Style
- neo-Renaissance
- Primary material
- Terra cotta
- Built as
- Store and lofts
Source: NYC Landmarks Preservation Commission, Individual Landmark and Historic District Building Database on NYC Open Data, pulled 2026-10-16. A designation can cover part of a lot, such as a facade or a lobby interior.
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Questions about 15 West 21st Street
How big is 15 West 21st Street?
15 West 21st Street has about 137,000 square feet of floor area in total, including 117,000 square feet of office and 20,000 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 15 West 21st Street built?
The Landmarks Preservation Commission's building records date 15 West 21st Street to 1910, designed by William Harvey Birkmire. The building is 12 floors tall.
Who designed 15 West 21st Street?
William Harvey Birkmire, 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 15 West 21st Street have?
City records list 15-17 West 21st Street and 16-18 West 22nd Street on the same tax lot (BBL 1008230029) as 15 West 21st Street. A space listed on Leasemark at any of these addresses shows up on this page.
What is the ZIP code of 15 West 21st Street?
15 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 15 West 21st Street, New York, NY 10010, in Flatiron.
What is the zoning at 15 West 21st Street?
The lot is in the C6-4A zoning district. PLUTO lists a built floor area ratio (FAR) of 12.23 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 15 West 21st Street?
The closest subway station to 15 West 21st Street is 23 St (the R and W trains), about 600 feet away in a straight line, roughly 2 minutes on foot. Also nearby: 23 St (the F and M trains), 3 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 15 West 21st Street?
The NYC Department of Finance's 2026/27 assessment roll lists MEYSAR REALTY CORP as the owner of record of 15 West 21st Street (BBL 1008230029). Deeds and mortgages for the lot are public in ACRIS, the city's property records system.
What is the energy grade of 15 West 21st Street?
15 West 21st Street reported an ENERGY STAR score of 69 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 69 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 82.1 kBtu per square foot, 23% below the national median of 107.1 for a similar property. Its greenhouse gas emissions were about 1,096 metric tons of CO2e (7.02 kg per square foot).
Does 15 West 21st Street meet Local Law 97?
At its 2024 energy use, 15 West 21st Street comes to about 921 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 1,480 tons for 2024 to 2029 (62% of the limit), so it would owe no penalty. From 2030 the limit drops to 526 tons and the same energy use counts as about 678 tons, about 151 tons over, or an estimated $41,000 a year unless the building cuts its emissions. This is an estimate from the owner's 2024 benchmarking filing using the coefficients and per-use limits in the law and the Department of Buildings rule, at $268 per ton over. It is not the building's Local Law 97 report, which can count credits and deductions this estimate cannot.
Is there construction at 15 West 21st Street?
In the 12 months to October 2026, the Department of Buildings issued first permits for 3 jobs at 15 West 21st Street. In the last two years, interior work was permitted on 4 floors (floors 2, 4, 7 and 8 and the lobby). The newest build-out, on floor 4, was first permitted in August 2026 (construction, mechanical, plumbing, sprinklers; filed cost estimate $1.3 million). These are the Department of Buildings' DOB NOW work permits for tax lot 1008230029. 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 15 West 21st Street?
The Department of Finance's 2026/27 assessment roll lists a taxable value of $13.3 million for 15 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 $1.44 million a year, roughly $10.52 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1008230029 show the actual bill.
What is the assessed value of 15 West 21st Street?
For tax year 2026/27, the NYC Department of Finance puts the market value of 15 West 21st Street at $31.7 million ($3.6 million of it land) and its assessed value at $14.3 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 19% from 2022/23 ($26.7 million) to 2026/27.
Are there vacant storefronts at 15 West 21st Street?
Owners registered 2 storefronts at 15 West 21st Street 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.
Is there office space for lease at 15 West 21st Street?
No space at 15 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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