Office building · Grand Central, Manhattan
521 Fifth Avenue
New York, NY
521 Fifth Avenue is a 38-floor office building in Grand Central, Manhattan, built in 1929, with about 372,000 square feet of office space according to city records.
Also at 1 East 43rd Street and 519-525 Fifth Avenue.
- Office space
- 372K SF
- Floors
- 38
- Year built
- 1929
- Zoning
- C5-3
The 30th largest of the 83 office buildings we track in Grand Central. Compare it with 6 neighbors
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Compared with its neighbors
How 521 Fifth Avenue compares
Next to the 6 nearest large office buildings, all within a 1 minute walk, 521 Fifth Avenue ranks 2nd of 7 by office floor area. It went up in 1929; the median neighbor dates from 1942. Its estimated property tax, about $18.24 a square foot of floor area before abatements, is above the neighbors' median of $17.23.
| Building | Office space | Floors | Built | Tax / SF | Last sale |
|---|---|---|---|---|---|
| 521 Fifth Avenue | 372K SF | 38 | 1929 | $18.24 | May 2019, $379M |
| 529 Fifth Avenue | 243K SF | 19 | 1958 | $14.68 | Jun 2023, $108M |
| 511 Fifth Avenue | 121K SF | 17 | 1917 | $13.36 | n/a |
| 5 East 42nd Street | 287K SF | 27 | 1968 | $16.96 | Sep 2025, $135M |
| 340 Madison Avenue | 538K SF | 22 | 1922 | $26.41 | Mar 2025, $161M |
| 505 Fifth Avenue | 231K SF | 28 | 2004 | $24.13 | n/a |
| 531 Fifth Avenue | 321K SF | 36 | 1927 | $17.50 | Mar 2006, $116M |
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); ACRIS for the last deed that moved the whole lot for a real price (a price for several lots is their combined price; condominiums sell by the unit and show n/a). 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
- 1 East 43rd Street; 519-525 Fifth Avenue
- ZIP code
- 10175 (PLUTO); 10017 (Finance roll)
- Building type
- Office building (city class O4)
- Total floor area
- 434,152 SF
- Commercial floor area
- 434,152 SF
- Office
- 371,539 SF
- Retail
- 38,092 SF
- Industrial and storage
- 24,521 SF
- Height
- 38 floors
- Average floor
- About 11,400 SF (floor area divided by floors)
- Year built
- 1929
- Last major alteration
- 2019
- Lot area
- 19,047 SF
- Zoning district
- C5-3
- Built FAR
- 22.79
- Max commercial FAR
- 15
- Tax lot (BBL)
- 1012780001
Nearest subway
- Grand Central-42 St
- 5 Av
- 47-50 Sts-Rockefeller Ctr
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
The Department of Finance lists 521 FIFTH AVENUE PROPERTY INVESTORS IV, LLC as the owner of record. For tax year 2026/27 the city values 521 Fifth Avenue at $162.2 million and assesses it at $73 million. After phase-ins and exemptions its taxable value is $73 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 $7.92 million a year before abatements, roughly $18.24 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
- 521 FIFTH AVENUE PROPERTY INVESTORS IV, LLC
- Tax class
- Class 4 (commercial and industrial)
- City market value
- $162,222,200
- Land market value
- $25,696,000
- Assessed value
- $73,000,000
- Estimated yearly tax
- About $7.92 million
- Tax per SF of floor area
- About $18.24
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 property records (ACRIS)
Sales history
521 Fifth Avenue last sold in May 2019 for $379.3 million, according to the deed recorded with the city. 521 FIFTH FEE OWNER LLC sold it to 521 FIFTH AVENUE PROPERTY INVESTORS IV, LLC. That comes to about $874 per square foot of floor area.
- Last sale (deed date)
- May 22, 2019
- Price
- $379,283,537
- Price per SF of floor area
- About $874
- Seller
- 521 FIFTH FEE OWNER LLC
- Buyer
- 521 FIFTH AVENUE PROPERTY INVESTORS IV, LLC
- Deed recorded
- May 23, 2019
- ACRIS document
- 2019052201220001
Recorded sales
Source: NYC Department of Finance, ACRIS, Real Property Master, Legals and Parties, pulled 2026-10-16; prices as the deeds state them, names as recorded (companies and public bodies only). Shown are deeds that move the whole lot for a real price. Transfers between related companies for a nominal sum, sales of partial interests, land sales before the building went up and sales of the company that owns a building are left out.
SEC filings (EDGAR)
Companies with offices here
6 investment managers and funds give 521 Fifth Avenue as their office address in SEC filings.
Investment managers and funds
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 Fifth Avenue's 2024 Local Law 84 benchmarking filing got no ENERGY STAR score (the filing does not cover 12 full months of meter data), and Local Law 33 letter grades come from that score, so the filing does not yield an A to D grade.
- ENERGY STAR score (2024)
- None given
- Property type (Portfolio Manager)
- Office
- Floor area in the filing
- 446,045 SF
- ENERGY STAR certified
- 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
ENERGY STAR score by year
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.
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 4 jobs at 521 Fifth Avenue. In the last two years, interior work was permitted on 2 floors (floors 8 and 14). The newest build-out, on floor 8, was first permitted in June 2026 (construction; filed cost estimate $48,000).
- New jobs, last 12 months
- 4
- Initial permits, last 12 months
- 4
- Newest job first permitted
- August 2026
- Interior build-outs, last 24 months
- 2
- Floors with interior work, last 24 months
- 8 and 14
- Facade and sidewalk jobs, last 24 months
- 1
Recent build-outs
New jobs by year
Build-outs across Grand CentralWhere 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.
No office space listed in Grand Central yet
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Before you sign
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Questions about 521 Fifth Avenue
How big is 521 Fifth Avenue?
521 Fifth Avenue has about 434,000 square feet of floor area in total, including 372,000 square feet of office, 38,000 square feet of retail and 25,000 square feet of industrial and storage space, according to NYC PLUTO 26v2. These are the city's estimates for the whole building, not space that is available.
When was 521 Fifth Avenue built?
City records list 1929 as the year built, with a major alteration recorded in 2019. The building is 38 floors tall.
What other addresses does 521 Fifth Avenue have?
City records list 1 East 43rd Street and 519-525 Fifth Avenue on the same tax lot (BBL 1012780001) as 521 Fifth Avenue. A space listed on Leasemark at any of these addresses shows up on this page.
What is the ZIP code of 521 Fifth Avenue?
City records give two ZIP codes for this tax lot: 10175 in NYC PLUTO 26v2 and 10017 on the Department of Finance's assessment roll. Some large New York buildings have a ZIP code of their own beside the area's, so check with the building's management which one it uses before you rely on either.
What is the zoning at 521 Fifth Avenue?
The lot is in the C5-3 zoning district. PLUTO lists a built floor area ratio (FAR) of 22.79 and a maximum commercial FAR of 15 for this lot.
What subway station is closest to 521 Fifth Avenue?
The closest subway station to 521 Fifth Avenue is Grand Central-42 St (the 4, 5, 6, 7 and S trains), about 550 feet away in a straight line, roughly 2 minutes on foot. The MTA lists it as an accessible station. Also nearby: 5 Av (the 7, B, D, F and M trains, connected to 42 St-Bryant Pk), 2 min walk; 47-50 Sts-Rockefeller Ctr (the B, D, F and M trains), 6 min walk. Walking times are straight-line estimates; the street route is longer.
Who owns 521 Fifth Avenue?
The NYC Department of Finance's 2026/27 assessment roll lists 521 FIFTH AVENUE PROPERTY INVESTORS IV, LLC as the owner of record of 521 Fifth Avenue (BBL 1012780001). 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.
Who are the tenants at 521 Fifth Avenue?
Leasemark does not have the building's tenant roster, but SEC filings name companies with offices at 521 Fifth Avenue. 6 investment managers and funds file 13F holdings reports from the address, including Bienville Capital Management, LLC; Douglass Winthrop Advisors, LLC; and Greenline Partners, LLC. 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.
When was 521 Fifth Avenue last sold?
521 Fifth Avenue last sold in May 2019 for $379.3 million, according to the deed recorded with the city. 521 FIFTH FEE OWNER LLC sold it to 521 FIFTH AVENUE PROPERTY INVESTORS IV, LLC. That comes to about $874 per square foot of floor area. The deed is ACRIS document 2019052201220001 (BBL 1012780001) in the city's property records. A sale of the company that owns a building is not recorded as a deed, so it would not show there.
Does 521 Fifth Avenue have an energy grade?
521 Fifth Avenue's 2024 Local Law 84 benchmarking filing got no ENERGY STAR score (the filing does not cover 12 full months of meter data), and Local Law 33 letter grades come from that score, so the filing does not yield an A to D grade.
Is there construction at 521 Fifth Avenue?
In the 12 months to October 2026, the Department of Buildings issued first permits for 4 jobs at 521 Fifth Avenue. In the last two years, interior work was permitted on 2 floors (floors 8 and 14). The newest build-out, on floor 8, was first permitted in June 2026 (construction; filed cost estimate $48,000). These are the Department of Buildings' DOB NOW work permits for tax lot 1012780001. 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 Fifth Avenue?
The Department of Finance's 2026/27 assessment roll lists a taxable value of $73 million for 521 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 $7.92 million a year, roughly $18.24 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1012780001 show the actual bill.
What is the assessed value of 521 Fifth Avenue?
For tax year 2026/27, the NYC Department of Finance puts the market value of 521 Fifth Avenue at $162.2 million ($25.7 million of it land) and its assessed value at $73 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 7% from 2022/23 ($151 million) to 2026/27.
Is there office space for lease at 521 Fifth Avenue?
No space at 521 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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Grand Central
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