Office condominium · Upper West Side, Manhattan
521 West 57th Street
New York, NY 10019
521 West 57th Street is a 10-floor office condominium in the Upper West Side, Manhattan, built in 1927, with about 368,000 square feet of office space according to city records.
Also at 521-541 West 57th Street and 518-528 West 58th Street.
- Office space
- 368K SF
- Floors
- 10
- Year built
- 1927
- Zoning
- M1-5
The 6th largest of the 20 office buildings we track in the Upper West Side. Compare it with 6 neighbors
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Compared with its neighbors
How 521 West 57th Street compares
Next to the 6 nearest large office buildings, all within a 3 minute walk, 521 West 57th Street ranks 2nd of 7 by office floor area. It went up in 1927; the median neighbor dates from 1962. Its estimated property tax, about $12.01 a square foot of floor area before abatements, is close to the neighbors' median of $11.63.
| Building | Office space | Floors | Built | Tax / SF |
|---|---|---|---|---|
| 521 West 57th Street | 368K SF | 10 | 1927 | $12.01 |
| 515 West 57th Street | 46K SF | 3 | 1910 | $11.24 |
| 524 West 57th Street | 52K SF | 8 | 1912 | $9.86 |
| 514 West 57th Street | 37K SF | 6 | 1940 | $12.19 |
| 555 West 57th Street | 581K SF | 20 | 2005 | $15.53 |
| 513 West 56th Street | 186K SF | 10 | 1984 | $12.01 |
| 600 West 58th Street | 67K SF | 10 | 2015 | $8.71 |
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
- 521-541 West 57th Street; 518-528 West 58th Street
- ZIP code
- 10019
- Building type
- Office condominium (city class RB)
- Total floor area
- 368,195 SF
- Commercial floor area
- 368,195 SF
- Office
- 368,195 SF
- Height
- 10 floors
- Average floor
- About 36,800 SF (floor area divided by floors)
- Year built
- 1927
- Last major alteration
- 1988
- Lot area
- 42,677 SF
- Zoning district
- M1-5
- Built FAR
- 8.63
- Max commercial FAR
- 5
- Tax lot (BBL)
- 1010867501
Nearest subway
- 59 St-Columbus Circle
- 66 St-Lincoln Center
- 50 St
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 Department of Finance records
Owner, property tax and assessed value
521 West 57th Street is a condominium of 5 tax lots. 521-533 WEST 57TH ST, one of 3 owners of record on the roll, owns the units that make up 51% of its market value. For tax year 2026/27 the city values 521 West 57th Street at $107.2 million and assesses it at $48.2 million. After phase-ins and exemptions its taxable value is $40.8 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 $4.42 million a year before abatements, roughly $12.01 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.
- Largest unit owner
- 521-533 WEST 57TH ST (51% of market value)
- Tax class
- Class 4 (commercial and industrial)
- City market value
- $107,156,000
- Land market value
- $8,540,000
- Assessed value
- $48,220,200
- Taxable value (phased in)
- $40,772,366
- Estimated yearly tax
- About $4.42 million
- Tax per SF of floor area
- About $12.01
- Condominium tax lots
- 5
- Owners of record
- 3
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How to find who owns any NYC buildingSource: NYC Department of Finance, Property Valuation and Assessment Data (2026/27 roll, summed over 5 condominium tax lots; 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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SEC filings (EDGAR)
Companies with offices here
One public company gives 521 West 57th Street as its office address in SEC filings.
Public company
Source: U.S. Securities and Exchange Commission, EDGAR, Financial Statement Data Sets (2025 Q4 to 2026 Q3) and Form 13F Data Sets (through August 2026), pulled 2026-10-24; names as filed. The address is the one each company reports to the SEC. This is not a tenant roster: private companies and most smaller firms do not file with the SEC, a company can report a building it owns, and an address can trail a move by a quarter. Care-of addresses, blank check companies and asset-backed issuers are left out.
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NYC energy benchmarking (Local Law 84)
Energy use and emissions
521 West 57th Street's 2024 Local Law 84 benchmarking filing got no ENERGY STAR score (a campus of several buildings cannot get a score), and Local Law 33 letter grades come from that score, so the filing does not yield an A to D grade. Its site energy use came to 113.5 kBtu per square foot, 80% above the national median of 63.2 for a similar property. Its greenhouse gas emissions were about 4,116 metric tons of CO2e (9.72 kg per square foot).
- ENERGY STAR score (2024)
- None given
- Property type (Portfolio Manager)
- Office
- Site energy use intensity
- 113.5 kBtu/SF
- National median for the type
- 63.2 kBtu/SF
- Greenhouse gas emissions
- 4,116 t CO2e
- Emissions per SF
- 9.72 kg CO2e
- Floor area in the filing
- 423,251 SF
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.
Local Law 97 of 2019, estimated
Local Law 97 emissions limit
At its 2024 energy use, 521 West 57th Street comes to about 2,932 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 3,369 tons for 2024 to 2029 (87% of the limit), so it would owe no penalty. From 2030 the limit drops to 1,256 tons and the same energy use counts as about 2,070 tons, about 814 tons over, or an estimated $218,000 a year unless the building cuts its emissions.
- Period
- 2024 to 2029
- Emissions limit
- 3,369 t CO2e
- Estimated emissions
- 2,932 t CO2e
- Under the limit by
- 437 t CO2e
- Estimated penalty a year
- None
- Period
- 2030 to 2034
- Emissions limit
- 1,256 t CO2e
- Estimated emissions
- 2,070 t CO2e
- Over the limit by
- 814 t CO2e
- Estimated penalty a year
- $218,000
Estimated from the owner's 2024 Local Law 84 filing, which reports energy by source and floor area by use: Office 385,251 SF; Urgent Care/Clinic/Other Outpatient 38,000 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 521 West 57th 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 2 jobs at 521 West 57th Street. In the last two years, interior work was permitted on 10 floors (floors 1 to 10 and the cellar). The newest build-out, on floors 1 to 10 and the roof, was first permitted in August 2025 (boiler; filed cost estimate $77,000). A sidewalk shed permit here is active until December 23, 2026.
- New jobs, last 12 months
- 2
- Initial permits, last 12 months
- 2
- Newest job first permitted
- January 2026
- Interior build-outs, last 24 months
- 9
- Floors with interior work, last 24 months
- 1 to 10, cellar
- Facade and sidewalk jobs, last 24 months
- 5
- Sidewalk shed permit
- Active until Dec 23, 2026
Recent build-outs
New jobs by year
Build-outs across the Upper West SideWhere 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.
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Before you sign
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Questions about 521 West 57th Street
How big is 521 West 57th Street?
521 West 57th Street has about 368,000 square feet of floor area in total, including 368,000 square feet of office, according to NYC PLUTO 26v2. These are the city's estimates for the whole building, not space that is available.
When was 521 West 57th Street built?
City records list 1927 as the year built, with a major alteration recorded in 1988. The building is 10 floors tall.
What other addresses does 521 West 57th Street have?
City records list 521-541 West 57th Street and 518-528 West 58th Street on the same tax lot (BBL 1010867501) as 521 West 57th Street. A space listed on Leasemark at any of these addresses shows up on this page.
What is the ZIP code of 521 West 57th Street?
521 West 57th Street is in ZIP code 10019, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The full mailing address is 521 West 57th Street, New York, NY 10019, in the Upper West Side.
What is the zoning at 521 West 57th Street?
The lot is in the M1-5 zoning district. PLUTO lists a built floor area ratio (FAR) of 8.63 and a maximum commercial FAR of 5 for this lot.
What subway station is closest to 521 West 57th Street?
The closest subway station to 521 West 57th Street is 59 St-Columbus Circle (the 1, A, B, C and D trains), about 0.4 miles away in a straight line, roughly 8 minutes on foot. The MTA lists it as an accessible station. Also nearby: 66 St-Lincoln Center (the 1 train), 9 min walk; 50 St (the C and E trains), 11 min walk. Walking times are straight-line estimates; the street route is longer.
Who owns 521 West 57th Street?
521 West 57th Street is a condominium of 5 tax lots. 521-533 WEST 57TH ST, one of 3 owners of record on the roll, owns the units that make up 51% of its market value. That is from the NYC Department of Finance's 2026/27 assessment roll (BBL 1010867501). Deeds and mortgages for each unit are public in ACRIS, the city's property records system.
Who are the tenants at 521 West 57th Street?
Leasemark does not have the building's tenant roster, but SEC filings name companies with offices at 521 West 57th Street. One public company reports the address as its principal executive office: INTERNATIONAL FLAVORS & FRAGRANCES INC (IFF). Private companies do not file with the SEC, so the full list of tenants is longer, and a company can also report a building it owns.
Does 521 West 57th Street have an energy grade?
521 West 57th Street's 2024 Local Law 84 benchmarking filing got no ENERGY STAR score (a campus of several buildings cannot get a score), and Local Law 33 letter grades come from that score, so the filing does not yield an A to D grade. Its site energy use came to 113.5 kBtu per square foot, 80% above the national median of 63.2 for a similar property. Its greenhouse gas emissions were about 4,116 metric tons of CO2e (9.72 kg per square foot).
Does 521 West 57th Street meet Local Law 97?
At its 2024 energy use, 521 West 57th Street comes to about 2,932 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 3,369 tons for 2024 to 2029 (87% of the limit), so it would owe no penalty. From 2030 the limit drops to 1,256 tons and the same energy use counts as about 2,070 tons, about 814 tons over, or an estimated $218,000 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 521 West 57th Street?
In the 12 months to October 2026, the Department of Buildings issued first permits for 2 jobs at 521 West 57th Street. In the last two years, interior work was permitted on 10 floors (floors 1 to 10 and the cellar). The newest build-out, on floors 1 to 10 and the roof, was first permitted in August 2025 (boiler; filed cost estimate $77,000). A sidewalk shed permit here is active until December 23, 2026. These are the Department of Buildings' DOB NOW work permits for tax lot 1010867501. 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 521 West 57th Street?
The Department of Finance's 2026/27 assessment roll lists a taxable value of $40.8 million for 521 West 57th Street (the sum of its 5 condominium tax lots). At the Class 4 rate of 10.848% (tax year 2025/26, the latest rate the Department of Finance lists), that is about $4.42 million a year, roughly $12.01 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1010867501 show the actual bill.
What is the assessed value of 521 West 57th Street?
For tax year 2026/27, the NYC Department of Finance puts the market value of 521 West 57th Street at $107.2 million ($8.54 million of it land) and its assessed value at $48.2 million, the 45% of market value the city assesses for Class 4 property.
Is there office space for lease at 521 West 57th Street?
No space at 521 West 57th 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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