Office condominium · Upper East Side, Manhattan
511 East 71st Street
New York, NY 10021
511 East 71st Street is an 11-floor office condominium in the Upper East Side, Manhattan, built in 1958, with about 82,000 square feet of office space according to city records.
Also at 511-515 East 71st Street and 510-516 East 72nd Street.
- Office space
- 82K SF
- Floors
- 11
- Year built
- 1958
- Zoning
- R9
The 5th largest of the 12 office buildings we track in the Upper East Side. Compare it with 6 neighbors
No space at 511 East 71st 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 511 East 71st Street compares
Next to the 6 nearest large office buildings, all within a 12 minute walk, 511 East 71st Street ranks 4th of 7 by office floor area. It went up in 1958; the median neighbor dates from 1940. Its property tax is fully exempt on the city's assessment roll.
| Building | Office space | Floors | Built | Tax / SF | Last sale |
|---|---|---|---|---|---|
| 511 East 71st Street | 82K SF | 11 | 1958 | Exempt | n/a |
| 1334 York Avenue | 223K SF | 10 | 1921 | $19.26 | n/a |
| 413 East 69th Street | 243K SF | 18 | 2011 | Exempt | n/a |
| 205 East 67th Street | 149K SF | 7 | 1950 | $11.09 | n/a |
| 315 East 62nd Street | 63K SF | 6 | 1930 | $14.77 | Sep 2007, $31.3M |
| 321 East 61st Street | 79K SF | 7 | 2017 | Exempt | n/a |
| 306 East 61st Street | 61K SF | 7 | 1901 | $11.71 | Feb 2018, $47M |
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 50,000 SF of the building's main use. Walking times are straight-line estimates.
NYC tax lot records
Building facts
- Other addresses
- 511-515 East 71st Street; 510-516 East 72nd Street
- ZIP code
- 10021
- Building type
- Office condominium (city class RB)
- Total floor area
- 81,980 SF
- Commercial floor area
- 81,980 SF
- Office
- 81,980 SF
- Height
- 11 floors
- Average floor
- About 7,500 SF (floor area divided by floors)
- Year built
- 1958
- Lot area
- 17,880 SF
- Zoning district
- R9
- Built FAR
- 4.59
- Tax lot (BBL)
- 1014837502
Nearest subway
- 72 St
- Roosevelt Island
- 68 St-Hunter 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 Department of Finance records
Owner, property tax and assessed value
511 East 71st Street is a condominium of 3 tax lots. CORNELL UNIVERSITY, one of 2 owners of record on the roll, owns the units that make up 60% of its market value. For tax year 2026/27 the city values 511 East 71st Street at $36.7 million and assesses it at $16.5 million. Exemptions on the roll cover the whole taxable value, which is common for government, nonprofit and payment-in-lieu-of-taxes properties.
- Largest unit owner
- CORNELL UNIVERSITY (60% of market value)
- Tax class
- Class 4 (commercial and industrial)
- City market value
- $36,678,012
- Land market value
- $10,125,012
- Assessed value
- $16,505,106
- Exemptions
- $16,505,106
- Estimated yearly tax
- Fully exempt on the roll
- Condominium tax lots
- 3
- Owners of record
- 2
City market value by tax year
Source: NYC Department of Finance, Property Valuation and Assessment Data (2026/27 roll, summed over 3 condominium tax lots; owner names as the roll records them, which cuts some long names short), pulled 2026-10-02. Exempt properties can still owe charges or payments in lieu of taxes that the roll does not show.
NYC energy benchmarking (Local Law 84)
Energy use and emissions
511 East 71st Street's 2024 Local Law 84 benchmarking filing got no ENERGY STAR score (no single use that ENERGY STAR scores covers more than half of the floor area), and Local Law 33 letter grades come from that score, so the filing does not yield an A to D grade. The filing covers 6 tax lots together, so these figures are for the whole property.
- ENERGY STAR score (2024)
- None given
- Property type (Portfolio Manager)
- Laboratory
- Floor area in the filing
- 1,862,814 SF
- Tax lots in the filing
- 6
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, one filing for 6 tax lots), 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.
NYC Department of Buildings permits
Work permits and build-outs
The Department of Buildings issued no permits for new jobs at 511 East 71st Street in the 12 months to September 2026; the last one was first permitted in January 2024.
- New jobs, last 12 months
- 0
- Initial permits, last 12 months
- 0
- Newest job first permitted
- January 2024
- Interior build-outs, last 24 months
- 0
New jobs by year
Build-outs across the Upper East SideWhere 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.
Before you sign
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Questions about 511 East 71st Street
How big is 511 East 71st Street?
511 East 71st Street has about 82,000 square feet of floor area in total, including 82,000 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 511 East 71st Street built?
City records list 1958 as the year built. The building is 11 floors tall.
What other addresses does 511 East 71st Street have?
City records list 511-515 East 71st Street and 510-516 East 72nd Street on the same tax lot (BBL 1014837502) as 511 East 71st Street. A space listed on Leasemark at any of these addresses shows up on this page.
What is the ZIP code of 511 East 71st Street?
511 East 71st Street is in ZIP code 10021, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The full mailing address is 511 East 71st Street, New York, NY 10021, in the Upper East Side.
What is the zoning at 511 East 71st Street?
The lot is in the R9 zoning district. PLUTO lists a built floor area ratio (FAR) of 4.59 for this lot.
What subway station is closest to 511 East 71st Street?
The closest subway station to 511 East 71st Street is 72 St (the Q train), about 0.3 miles away in a straight line, roughly 7 minutes on foot. The MTA lists it as an accessible station. Also nearby: Roosevelt Island (the M train), 10 min walk; 68 St-Hunter College (the 6 train), 12 min walk. Walking times are straight-line estimates; the street route is longer.
Who owns 511 East 71st Street?
511 East 71st Street is a condominium of 3 tax lots. CORNELL UNIVERSITY, one of 2 owners of record on the roll, owns the units that make up 60% of its market value. That is from the NYC Department of Finance's 2026/27 assessment roll (BBL 1014837502). Deeds and mortgages for each unit are public in ACRIS, the city's property records system.
Does 511 East 71st Street have an energy grade?
511 East 71st Street's 2024 Local Law 84 benchmarking filing got no ENERGY STAR score (no single use that ENERGY STAR scores covers more than half of the floor area), and Local Law 33 letter grades come from that score, so the filing does not yield an A to D grade. The filing covers 6 tax lots together, so these figures are for the whole property.
Is there construction at 511 East 71st Street?
The Department of Buildings issued no permits for new jobs at 511 East 71st Street in the 12 months to September 2026; the last one was first permitted in January 2024. These are the Department of Buildings' DOB NOW work permits for tax lot 1014837502. 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 511 East 71st Street?
The Department of Finance's 2026/27 assessment roll lists exemptions covering the whole taxable value of 511 East 71st Street (the sum of its 3 condominium tax lots), so there is no property tax on the roll to estimate. That is common for government, nonprofit and payment-in-lieu-of-taxes (PILOT) properties. The city's property tax records for BBL 1014837502 show what is actually billed.
What is the assessed value of 511 East 71st Street?
For tax year 2026/27, the NYC Department of Finance puts the market value of 511 East 71st Street at $36.7 million ($10.1 million of it land) and its assessed value at $16.5 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 22% from 2022/23 ($30.2 million) to 2026/27.
Is there office space for lease at 511 East 71st Street?
No space at 511 East 71st 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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