Office building · Flatiron, Manhattan
120 East 23rd Street
New York, NY 10010
120 East 23rd Street is a 12-floor office building in Flatiron, Manhattan, built in 1913, with about 201,000 square feet of office space according to city records.
Also at 115-119 East 22nd Street and 114-120 East 23rd Street.
- Office space
- 201K SF
- Floors
- 12
- Year built
- 1913
- Zoning
- C6-4A
The 14th largest of the 90 office buildings we track in Flatiron. Compare it with 6 neighbors
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Compared with its neighbors
How 120 East 23rd Street compares
Next to the 6 nearest large office buildings, all within a 2 minute walk, 120 East 23rd Street ranks 2nd of 7 by office floor area. It went up in 1913; the median neighbor dates from 1912. Its estimated property tax, about $11.56 a square foot of floor area before abatements, is below the neighbors' median of $16.69.
| Building | Office space | Floors | Built | Tax / SF | Last sale |
|---|---|---|---|---|---|
| 120 East 23rd Street | 201K SF | 12 | 1913 | $11.56 | n/a |
| 287 Park Avenue South | 96K SF | 9 | 1893 | $16.81 | Aug 2014, $128M |
| 115 East 23rd Street | 65K SF | 12 | 1913 | $11.52 | n/a |
| 315 Park Avenue South | 344K SF | 20 | 1911 | $20.93 | Jan 2015, $354M |
| 286 Park Avenue South | 148K SF | 14 | 1911 | $16.56 | n/a |
| 304 Park Avenue South | 159K SF | 12 | 1930 | $22.65 | Jun 2012, $67M |
| 121 East 24th Street | 55K SF | 12 | 1913 | $12.23 | 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 addresses
- 115-119 East 22nd Street; 114-120 East 23rd Street
- ZIP code
- 10010
- Building type
- Office building (city class O3)
- Total floor area
- 200,757 SF
- Commercial floor area
- 200,757 SF
- Office
- 200,757 SF
- Height
- 12 floors
- Average floor
- About 16,700 SF (floor area divided by floors)
- Year built
- 1913
- Last major alteration
- 2011
- Lot area
- 17,281 SF
- Zoning district
- C6-4A
- Built FAR
- 11.62
- Max commercial FAR
- 10
- Tax lot (BBL)
- 1008780065
Nearest subway
- 23 St-Baruch College
- 23 St
- 28 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 storefront registry (Local Law 157)
Storefronts and vacancy
Owners registered 2 storefronts at 120 East 23rd Street for December 31, 2025, the newest annual filing the city has published, and none stood vacant that day. A year earlier, 1 of 2 stood vacant.
- Storefronts registered for December 31, 2025
- 2
- Vacant that day
- 0
- Share vacant across Flatiron
- 11.8%
- Share vacant citywide
- 9.2%
Vacant on December 31, by year
Need a storefront in Flatiron? Get matchedNYC storefront vacancy report
Source: NYC Department of Finance, Storefronts Reported Vacant or Not (Local Law 157), annual filings for 2019 to 2025, pulled 2026-10-16. Owners of buildings with ground- or second-floor storefronts register each one every year with its status on December 31; counts are by tax lot, as the owners filed them. The 2025 filing was due June 1, 2026, so a storefront vacant then may have been leased since. A vacant storefront is not always on the market, and none here is listed on Leasemark unless it shows above.
NYC Department of Finance records
Property tax and assessed value
For tax year 2026/27 the city values 120 East 23rd Street at $47.5 million and assesses it at $21.4 million. After phase-ins and exemptions its taxable value is $21.4 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 $2.32 million a year before abatements, roughly $11.56 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.
- Tax class
- Class 4 (commercial and industrial)
- City market value
- $47,537,000
- Land market value
- $25,600,000
- Assessed value
- $21,391,650
- Estimated yearly tax
- About $2.32 million
- Tax per SF of floor area
- About $11.56
City market value by tax year
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Source: NYC Department of Finance, Property Valuation and Assessment Data (2026/27 roll), 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 energy benchmarking (Local Law 84)
Energy score, grade and emissions
120 East 23rd Street reported an ENERGY STAR score of 89 out of 100 for 2024 in its Local Law 84 benchmarking filing. Under Local Law 33 that score earns an A (85 or higher). Its site energy use came to 42.5 kBtu per square foot, less than half the national median of 86.8 for a similar property. Its greenhouse gas emissions were about 970 metric tons of CO2e (4.31 kg per square foot).
- ENERGY STAR score (2024)
- 89 of 100
- Grade this score earns (Local Law 33)
- A (85 or higher)
- Property type (Portfolio Manager)
- Office
- Site energy use intensity
- 42.5 kBtu/SF
- National median for the type
- 86.8 kBtu/SF
- Greenhouse gas emissions
- 970 t CO2e
- Emissions per SF
- 4.31 kg CO2e
- Floor area in the filing
- 225,001 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 2026-10-16; 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.
Local Law 97 of 2019, estimated
Local Law 97 emissions limit
At its 2024 energy use, 120 East 23rd Street comes to about 776 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 1,706 tons for 2024 to 2029 (45% of the limit), so it would owe no penalty. From 2030 the limit drops to 605 tons and the same energy use counts as about 506 tons, still under the limit.
- Period
- 2024 to 2029
- Emissions limit
- 1,706 t CO2e
- Estimated emissions
- 776 t CO2e
- Under the limit by
- 930 t CO2e
- Estimated penalty a year
- None
- Period
- 2030 to 2034
- Emissions limit
- 605 t CO2e
- Estimated emissions
- 506 t CO2e
- Under the limit by
- 99 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 225,001 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 120 East 23rd 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 9 jobs at 120 East 23rd Street. In the last two years, interior work was permitted on 6 floors (floors 1 to 4, 7 and 11 and the cellar). The newest build-out, on floor 1 and the cellar, was first permitted in June 2026 (construction, structural; filed cost estimate $2.2 million).
- New jobs, last 12 months
- 9
- Initial permits, last 12 months
- 13
- Newest job first permitted
- September 2026
- Interior build-outs, last 24 months
- 10
- Floors with interior work, last 24 months
- 1 to 4, 7 and 11, cellar
- Facade and sidewalk jobs, last 24 months
- 6
Recent build-outs
New jobs by year
Build-outs across FlatironWhere 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 120 East 23rd Street
How big is 120 East 23rd Street?
120 East 23rd Street has about 201,000 square feet of floor area in total, including 201,000 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 120 East 23rd Street built?
City records list 1913 as the year built, with a major alteration recorded in 2011. The building is 12 floors tall.
What other addresses does 120 East 23rd Street have?
City records list 115-119 East 22nd Street and 114-120 East 23rd Street on the same tax lot (BBL 1008780065) as 120 East 23rd Street. A space listed on Leasemark at any of these addresses shows up on this page.
What is the ZIP code of 120 East 23rd Street?
120 East 23rd Street is in ZIP code 10010, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The full mailing address is 120 East 23rd Street, New York, NY 10010, in Flatiron.
What is the zoning at 120 East 23rd Street?
The lot is in the C6-4A zoning district. PLUTO lists a built floor area ratio (FAR) of 11.62 and a maximum commercial FAR of 10 for this lot.
What subway station is closest to 120 East 23rd Street?
The closest subway station to 120 East 23rd Street is 23 St-Baruch College (the 6 train), about 300 feet away in a straight line, roughly 1 minute on foot. The MTA lists it as an accessible station. Also nearby: 23 St (the R and W trains), 5 min walk; 28 St (the 6 train), 5 min walk. Walking times are straight-line estimates; the street route is longer.
What is the energy grade of 120 East 23rd Street?
120 East 23rd Street reported an ENERGY STAR score of 89 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 89 earns an A. 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 42.5 kBtu per square foot, less than half the national median of 86.8 for a similar property. Its greenhouse gas emissions were about 970 metric tons of CO2e (4.31 kg per square foot).
Does 120 East 23rd Street meet Local Law 97?
At its 2024 energy use, 120 East 23rd Street comes to about 776 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 1,706 tons for 2024 to 2029 (45% of the limit), so it would owe no penalty. From 2030 the limit drops to 605 tons and the same energy use counts as about 506 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 120 East 23rd Street?
In the 12 months to October 2026, the Department of Buildings issued first permits for 9 jobs at 120 East 23rd Street. In the last two years, interior work was permitted on 6 floors (floors 1 to 4, 7 and 11 and the cellar). The newest build-out, on floor 1 and the cellar, was first permitted in June 2026 (construction, structural; filed cost estimate $2.2 million). These are the Department of Buildings' DOB NOW work permits for tax lot 1008780065. 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 120 East 23rd Street?
The Department of Finance's 2026/27 assessment roll lists a taxable value of $21.4 million for 120 East 23rd Street. At the Class 4 rate of 10.848% (tax year 2025/26, the latest rate the Department of Finance lists), that is about $2.32 million a year, roughly $11.56 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1008780065 show the actual bill.
What is the assessed value of 120 East 23rd Street?
For tax year 2026/27, the NYC Department of Finance puts the market value of 120 East 23rd Street at $47.5 million ($25.6 million of it land) and its assessed value at $21.4 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 5% from 2022/23 ($45.4 million) to 2026/27.
Are there vacant storefronts at 120 East 23rd Street?
Owners registered 2 storefronts at 120 East 23rd Street for December 31, 2025, the newest annual filing the city has published, and none stood vacant that day. A year earlier, 1 of 2 stood vacant. These are the owners' filings with the Department of Finance under Local Law 157, so a storefront may have come free since. Owners and brokers can list a storefront on Leasemark for free.
Is there office space for lease at 120 East 23rd Street?
No space at 120 East 23rd 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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Flatiron
Transit hubs in Flatiron
- R W at 23 St
- 4 5 6 L N Q R W at 14 St-Union Sq
- F M at 23 St