Office condominium · Upper East Side, Manhattan
323 East 61st Street
New York, NY 10065
323 East 61st Street is a 6-floor office condominium in the Upper East Side, Manhattan, built in 2019, with about 50,000 square feet of office space according to city records.
Also at 323-333 East 61st Street.
- Office space
- 50K SF
- Floors
- 6
- Year built
- 2019
- Zoning
- R8B
The 13th largest of the 18 office buildings we track in the Upper East Side. Compare it with 6 neighbors
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Compared with its neighbors
How 323 East 61st Street compares
Next to the 6 nearest large office buildings, all within a 4 minute walk, 323 East 61st Street ranks 4th of 7 by office floor area. Built in 2019, it is the newest of them. Its property tax is fully exempt on the city's assessment roll.
| Building | Office space | Floors | Built | Tax / SF | Last sale |
|---|---|---|---|---|---|
| 323 East 61st Street | 50K SF | 6 | 2019 | Exempt | n/a |
| 321 East 61st Street | 79K SF | 7 | 2017 | Exempt | n/a |
| 306 East 61st Street | 61K SF | 7 | 1901 | $11.71 | Feb 2018, $47M |
| 315 East 62nd Street | 63K SF | 6 | 1930 | $14.77 | Sep 2007, $31.3M |
| 407 East 61st Street | 39K SF | 7 | 1928 | Exempt | n/a |
| 409 East 60th Street | 35K SF | 5 | 1930 | $28.14 | May 2011, $24M |
| 222 East 59th Street | 38K SF | 5 | 2001 | $13.32 | n/a |
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 address
- 323-333 East 61st Street
- ZIP code
- 10065
- Building type
- Office condominium (city class RB)
- Total floor area
- 49,843 SF
- Commercial floor area
- 49,843 SF
- Office
- 49,843 SF
- Height
- 6 floors
- Average floor
- About 8,300 SF (floor area divided by floors)
- Year built
- 2019
- Lot area
- 9,917 SF
- Zoning district
- R8B
- Built FAR
- 5.03
- Tax lot (BBL)
- 1014367506
Nearest subway
- Lexington Av/59 St
- Lexington Av/63 St
- Lexington Av/53 St
Source: NYC Department of City Planning, PLUTO 26v2, pulled 2026-10-05; addresses from the Property Address Directory (PAD) 26b; subway stations from the MTA Subway Stations dataset, pulled 2026-10-05. 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
323 East 61st Street is a condominium of 7 tax lots. MEMORIAL HOSPITAL FOR CANCER AND ALLIED DISEASES owns the units that make up 100% of its market value. For tax year 2026/27 the city values 323 East 61st Street at $18.8 million and assesses it at $8.47 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
- MEMORIAL HOSPITAL FOR CANCER AND ALLIED DISEASES (100% of market value)
- Tax class
- Class 4 (commercial and industrial)
- City market value
- $18,828,999
- Land market value
- $4,138,999
- Assessed value
- $8,473,052
- Exemptions
- $8,473,052
- Estimated yearly tax
- Fully exempt on the roll
- Condominium tax lots
- 7
- Owners of record
- 1
City market value by tax year
Source: NYC Department of Finance, Property Valuation and Assessment Data (2026/27 roll, summed over 7 condominium tax lots; owner names as the roll records them, which cuts some long names short), pulled 2026-10-08. Exempt properties can still owe charges or payments in lieu of taxes that the roll does not show.
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NYC energy benchmarking (Local Law 84)
Energy score, grade and emissions
323 East 61st Street reported an ENERGY STAR score of 53 out of 100 for 2024 in its Local Law 84 benchmarking filing. Under Local Law 33 that score earns a D (under 55). Its site energy use came to 74.2 kBtu per square foot, about the same as the national median of 77.4 for a similar property. Its greenhouse gas emissions were about 419 metric tons of CO2e (6.95 kg per square foot).
- ENERGY STAR score (2024)
- 53 of 100
- Grade this score earns (Local Law 33)
- D (under 55)
- Property type (Portfolio Manager)
- Office
- Site energy use intensity
- 74.2 kBtu/SF
- National median for the type
- 77.4 kBtu/SF
- Greenhouse gas emissions
- 419 t CO2e
- Emissions per SF
- 6.95 kg CO2e
- Floor area in the filing
- 60,808 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 2026-10-08; 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 323 East 61st Street in the 12 months to October 2026; the last one was first permitted in November 2022.
- New jobs, last 12 months
- 0
- Initial permits, last 12 months
- 0
- Newest job first permitted
- November 2022
- 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 2026-10-08 (permits issued through 2026-10-06). 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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Questions about 323 East 61st Street
How big is 323 East 61st Street?
323 East 61st Street has about 50,000 square feet of floor area in total, including 50,000 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 323 East 61st Street built?
City records list 2019 as the year built. The building is 6 floors tall.
What other addresses does 323 East 61st Street have?
City records list 323-333 East 61st Street on the same tax lot (BBL 1014367506) as 323 East 61st Street. A space listed on Leasemark at any of these addresses shows up on this page.
What is the ZIP code of 323 East 61st Street?
323 East 61st Street is in ZIP code 10065, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The full mailing address is 323 East 61st Street, New York, NY 10065, in the Upper East Side.
What is the zoning at 323 East 61st Street?
The lot is in the R8B zoning district. PLUTO lists a built floor area ratio (FAR) of 5.03 for this lot.
What subway station is closest to 323 East 61st Street?
The closest subway station to 323 East 61st Street is Lexington Av/59 St (the N, R, W, 4, 5 and 6 trains, connected to 59 St), about 0.3 miles away in a straight line, roughly 6 minutes on foot. Also nearby: Lexington Av/63 St (the M and Q trains), 6 min walk; Lexington Av/53 St (the E, F and 6 trains, connected to 51 St), 9 min walk. Walking times are straight-line estimates; the street route is longer.
Who owns 323 East 61st Street?
323 East 61st Street is a condominium of 7 tax lots. MEMORIAL HOSPITAL FOR CANCER AND ALLIED DISEASES owns the units that make up 100% of its market value. That is from the NYC Department of Finance's 2026/27 assessment roll (BBL 1014367506). Deeds and mortgages for each unit are public in ACRIS, the city's property records system.
What is the energy grade of 323 East 61st Street?
323 East 61st Street reported an ENERGY STAR score of 53 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 53 earns a D. 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 74.2 kBtu per square foot, about the same as the national median of 77.4 for a similar property. Its greenhouse gas emissions were about 419 metric tons of CO2e (6.95 kg per square foot).
Is there construction at 323 East 61st Street?
The Department of Buildings issued no permits for new jobs at 323 East 61st Street in the 12 months to October 2026; the last one was first permitted in November 2022. These are the Department of Buildings' DOB NOW work permits for tax lot 1014367506. 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 323 East 61st Street?
The Department of Finance's 2026/27 assessment roll lists exemptions covering the whole taxable value of 323 East 61st Street (the sum of its 7 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 1014367506 show what is actually billed.
What is the assessed value of 323 East 61st Street?
For tax year 2026/27, the NYC Department of Finance puts the market value of 323 East 61st Street at $18.8 million ($4.14 million of it land) and its assessed value at $8.47 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 31% from 2022/23 ($14.4 million) to 2026/27.
Is there office space for lease at 323 East 61st Street?
No space at 323 East 61st 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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