Office condominium · Upper West Side, Manhattan
320 West 66th Street
New York, NY 10023
320 West 66th Street is a 7-floor office condominium in the Upper West Side, Manhattan, built in 1989, with about 474,000 square feet of office space according to city records.
Also at 300-312 West 66th Street and 121-135 West End Avenue.
- Office space
- 474K SF
- Floors
- 7
- Year built
- 1989
- Zoning
- C4-2F
The 3rd 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 320 West 66th Street compares
Next to the 6 nearest large office buildings, all within a 8 minute walk, 320 West 66th Street ranks 2nd of 7 by office floor area. It went up in 1989; the median neighbor dates from 1951. Its estimated property tax, about $8.13 a square foot of floor area before abatements, is below the neighbors' median of $13.77.
| Building | Office space | Floors | Built | Tax / SF |
|---|---|---|---|---|
| 320 West 66th Street | 474K SF | 7 | 1989 | $8.13 |
| 80 West End Avenue | 145K SF | 7 | 1913 | $0.00 |
| 1995 Broadway | 102K SF | 18 | 1974 | $19.01 |
| 600 West 58th Street | 67K SF | 10 | 2015 | $8.71 |
| 555 West 57th Street | 581K SF | 20 | 2005 | $15.53 |
| 521 West 57th Street | 368K SF | 10 | 1927 | $12.01 |
| 41 West 65th Street | 43K SF | 7 | 1928 | $17.93 |
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
- 300-312 West 66th Street; 121-135 West End Avenue
- ZIP code
- 10023
- Building type
- Office condominium (city class RB)
- Total floor area
- 474,496 SF
- Commercial floor area
- 474,496 SF
- Office
- 474,496 SF
- Height
- 7 floors
- Average floor
- About 67,800 SF (floor area divided by floors)
- Year built
- 1989
- Lot area
- 99,015 SF
- Zoning district
- C4-2F
- Built FAR
- 4.79
- Max commercial FAR
- 3.4
- Tax lot (BBL)
- 1011717514
Nearest subway
- 66 St-Lincoln Center
- 72 St
- 72 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
320 West 66th Street is a condominium of 2 tax lots. 125 WEST END ASSOCIATES LLC owns the units that make up 100% of its market value. For tax year 2026/27 the city values 320 West 66th Street at $85.6 million and assesses it at $38.5 million. After phase-ins and exemptions its taxable value is $35.6 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 $3.86 million a year before abatements, roughly $8.13 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
- 125 WEST END ASSOCIATES LLC (100% of market value)
- Tax class
- Class 4 (commercial and industrial)
- City market value
- $85,594,000
- Land market value
- $21,900,000
- Assessed value
- $38,517,300
- Taxable value (phased in)
- $35,572,860
- Estimated yearly tax
- About $3.86 million
- Tax per SF of floor area
- About $8.13
- Condominium tax lots
- 2
- Owners of record
- 1
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, summed over 2 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.
Own or manage 320 West 66th Street? List a space here free and we match it against every active requirement. Renting it out yourself? Read the landlord's checklist.
NYC energy benchmarking (Local Law 84)
Energy use and emissions
320 West 66th 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 32.9 kBtu per square foot, 39% below the national median of 53.8 for a similar property. Its greenhouse gas emissions were about 1,587 metric tons of CO2e (3.15 kg per square foot).
- ENERGY STAR score (2024)
- None given
- Property type (Portfolio Manager)
- Office
- Site energy use intensity
- 32.9 kBtu/SF
- National median for the type
- 53.8 kBtu/SF
- Greenhouse gas emissions
- 1,587 t CO2e
- Emissions per SF
- 3.15 kg CO2e
- Floor area in the filing
- 504,664 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, 320 West 66th Street comes to about 1,142 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 4,695 tons for 2024 to 2029 (24% of the limit), so it would owe no penalty. From 2030 the limit drops to 2,595 tons and the same energy use counts as about 710 tons, still under the limit.
- Period
- 2024 to 2029
- Emissions limit
- 4,695 t CO2e
- Estimated emissions
- 1,142 t CO2e
- Under the limit by
- 3,553 t CO2e
- Estimated penalty a year
- None
- Period
- 2030 to 2034
- Emissions limit
- 2,595 t CO2e
- Estimated emissions
- 710 t CO2e
- Under the limit by
- 1,885 t CO2e
- Estimated penalty a year
- None
Estimated from the owner's 2024 Local Law 84 filing, which reports energy by source and floor area by use: Office 440,672 SF; Food Service 14,042 SF; Laboratory 49,950 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 320 West 66th Street? List a space here free and we match it against every active requirement.
NYC Department of Buildings permits
Work permits and build-outs
The Department of Buildings issued no permits for new jobs at 320 West 66th Street in the 12 months to October 2026; the last one was first permitted in December 2024. In the last two years, interior work was permitted on one floor (floor 7). The newest build-out, on floor 7, was first permitted in November 2024 (construction, mechanical, plumbing, sprinklers; filed cost estimate $4.3 million).
- New jobs, last 12 months
- 0
- Initial permits, last 12 months
- 0
- Newest job first permitted
- December 2024
- Interior build-outs, last 24 months
- 1
- Floors with interior work, last 24 months
- 7
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.
No office space listed in the Upper West Side yet
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Before you sign
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Questions about 320 West 66th Street
How big is 320 West 66th Street?
320 West 66th Street has about 474,000 square feet of floor area in total, including 474,000 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 320 West 66th Street built?
City records list 1989 as the year built. The building is 7 floors tall.
What other addresses does 320 West 66th Street have?
City records list 300-312 West 66th Street and 121-135 West End Avenue on the same tax lot (BBL 1011717514) as 320 West 66th Street. A space listed on Leasemark at any of these addresses shows up on this page.
What is the ZIP code of 320 West 66th Street?
320 West 66th Street is in ZIP code 10023, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The full mailing address is 320 West 66th Street, New York, NY 10023, in the Upper West Side.
What is the zoning at 320 West 66th Street?
The lot is in the C4-2F zoning district. PLUTO lists a built floor area ratio (FAR) of 4.79 and a maximum commercial FAR of 3.4 for this lot.
What subway station is closest to 320 West 66th Street?
The closest subway station to 320 West 66th Street is 66 St-Lincoln Center (the 1 train), about 0.4 miles away in a straight line, roughly 7 minutes on foot. The MTA lists it as an accessible station. Also nearby: 72 St (the 1, 2 and 3 trains), 7 min walk; 72 St (the B and C trains), 12 min walk. Walking times are straight-line estimates; the street route is longer.
Who owns 320 West 66th Street?
320 West 66th Street is a condominium of 2 tax lots. 125 WEST END ASSOCIATES LLC 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 1011717514). Deeds and mortgages for each unit are public in ACRIS, the city's property records system.
Does 320 West 66th Street have an energy grade?
320 West 66th 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 32.9 kBtu per square foot, 39% below the national median of 53.8 for a similar property. Its greenhouse gas emissions were about 1,587 metric tons of CO2e (3.15 kg per square foot).
Does 320 West 66th Street meet Local Law 97?
At its 2024 energy use, 320 West 66th Street comes to about 1,142 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 4,695 tons for 2024 to 2029 (24% of the limit), so it would owe no penalty. From 2030 the limit drops to 2,595 tons and the same energy use counts as about 710 tons, still under the limit. 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 320 West 66th Street?
The Department of Buildings issued no permits for new jobs at 320 West 66th Street in the 12 months to October 2026; the last one was first permitted in December 2024. In the last two years, interior work was permitted on one floor (floor 7). The newest build-out, on floor 7, was first permitted in November 2024 (construction, mechanical, plumbing, sprinklers; filed cost estimate $4.3 million). These are the Department of Buildings' DOB NOW work permits for tax lot 1011717514. 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 320 West 66th Street?
The Department of Finance's 2026/27 assessment roll lists a taxable value of $35.6 million for 320 West 66th Street (the sum of its 2 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 $3.86 million a year, roughly $8.13 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1011717514 show the actual bill.
What is the assessed value of 320 West 66th Street?
For tax year 2026/27, the NYC Department of Finance puts the market value of 320 West 66th Street at $85.6 million ($21.9 million of it land) and its assessed value at $38.5 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 24% from 2022/23 ($69.2 million) to 2026/27.
Is there office space for lease at 320 West 66th Street?
No space at 320 West 66th 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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Upper West Side
Transit hubs in the Upper West Side
- 1 2 3 at 72 St
- B C at 81 St