Office building with commercial space · Union Square, Manhattan
233 Park Avenue South
New York, NY 10003
233 Park Avenue South is a 12-floor office building with commercial space in Union Square, Manhattan, built in 1909, with about 137,000 square feet of office space according to city records.
Also at 100 East 19th Street and 229-233 Park Avenue South.
- Office space
- 137K SF
- Floors
- 12
- Year built
- 1909
- Zoning
- C6-4A
The 15th largest of the 53 office buildings we track in Union Square. Compare it with 6 neighbors
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Compared with its neighbors
How 233 Park Avenue South compares
Next to the 6 nearest large office buildings, all within a 1 minute walk, 233 Park Avenue South ranks 4th of 7 by office floor area. It went up in 1909; the median neighbor dates from 1910. Its estimated property tax, about $20.74 a square foot of floor area before abatements, is above the neighbors' median of $18.84.
| Building | Office space | Floors | Built | Tax / SF | Last sale |
|---|---|---|---|---|---|
| 233 Park Avenue South | 137K SF | 12 | 1909 | $20.74 | n/a |
| 225 Park Avenue South | 181K SF | 19 | 1910 | $18.46 | n/a |
| 235 Park Avenue South | 59K SF | 12 | 1921 | $19.23 | n/a |
| 215 Park Avenue South | 275K SF | 20 | 1910 | $16.60 | n/a |
| 230 Park Avenue South | 311K SF | 13 | 1900 | $23.58 | Sep 2007, $229M |
| 242 Park Avenue South | 103K SF | 12 | 1911 | $20.52 | n/a |
| 67 Irving Place | 46K SF | 12 | 1910 | $11.44 | Oct 2017, $34.3M |
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
- 100 East 19th Street; 229-233 Park Avenue South
- ZIP code
- 10003
- Building type
- Office building with commercial space (city class O6)
- Total floor area
- 142,173 SF
- Commercial floor area
- 142,173 SF
- Office
- 137,173 SF
- Retail
- 5,000 SF
- Height
- 12 floors
- Average floor
- About 11,800 SF (floor area divided by floors)
- Year built
- 1909
- Last major alteration
- 1987
- Lot area
- 12,300 SF
- Zoning district
- C6-4A
- Built FAR
- 11.56
- Max commercial FAR
- 10
- Tax lot (BBL)
- 1008740004
Nearest subway
- 14 St-Union Sq
- 23 St-Baruch College
- 23 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 233 Park Avenue South for December 31, 2025, the newest annual filing the city has published, and none stood vacant that day.
- Storefronts registered for December 31, 2025
- 2
- Vacant that day
- 0
- Share vacant across Union Square
- 11.7%
- Share vacant along Park Avenue South
- 23.4%
- Share vacant citywide
- 9.2%
Vacant on December 31, by year
Need a storefront in Union Square? 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
Owner, property tax and assessed value
The Department of Finance lists 225 FOURTH LLC as the owner of record. For tax year 2026/27 the city values 233 Park Avenue South at $60.4 million and assesses it at $27.2 million. After phase-ins and exemptions its taxable value is $27.2 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 $2.95 million a year before abatements, roughly $20.74 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
- 225 FOURTH LLC
- Tax class
- Class 4 (commercial and industrial)
- City market value
- $60,402,000
- Land market value
- $18,600,000
- Assessed value
- $27,180,900
- Estimated yearly tax
- About $2.95 million
- Tax per SF of floor area
- About $20.74
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.
Own or manage 233 Park Avenue South? 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
233 Park Avenue South'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 50.9 kBtu per square foot, about the same as the national median of 52.8 for a similar property. Its greenhouse gas emissions were about 3,387 metric tons of CO2e (5.14 kg per square foot). The filing covers 2 tax lots together, so these figures are for the whole property.
- ENERGY STAR score (2024)
- None given
- Property type (Portfolio Manager)
- Office
- Site energy use intensity
- 50.9 kBtu/SF
- National median for the type
- 52.8 kBtu/SF
- Greenhouse gas emissions
- 3,387 t CO2e
- Emissions per SF
- 5.14 kg CO2e
- Floor area in the filing
- 658,649 SF
- Tax lots in the filing
- 2
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, one filing for 2 tax lots), 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, 233 Park Avenue South comes to about 2,708 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 5,063 tons for 2024 to 2029 (53% of the limit), so it would owe no penalty. From 2030 the limit drops to 1,773 tons and the same energy use counts as about 1,766 tons, still under the limit.
- Period
- 2024 to 2029
- Emissions limit
- 5,063 t CO2e
- Estimated emissions
- 2,708 t CO2e
- Under the limit by
- 2,355 t CO2e
- Estimated penalty a year
- None
- Period
- 2030 to 2034
- Emissions limit
- 1,773 t CO2e
- Estimated emissions
- 1,766 t CO2e
- Under the limit by
- 8 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: Restaurant 15,005 SF; Office 600,591 SF; Bank Branch 3,200 SF; Retail Store 39,853 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. The filing covers 2 tax lots together, so these figures are for the whole property.
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 233 Park Avenue South? 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 3 jobs at 233 Park Avenue South. In the last two years, interior work was permitted on 6 floors (floors 2 to 4, 8, 12 and 13). The newest build-out, on floor 2, was first permitted in August 2026 (construction, structural; filed cost estimate $40,000).
- New jobs, last 12 months
- 3
- Initial permits, last 12 months
- 5
- Newest job first permitted
- August 2026
- Interior build-outs, last 24 months
- 4
- Floors with interior work, last 24 months
- 2 to 4, 8, 12 and 13
Recent build-outs
New jobs by year
Build-outs across Union SquareWhere 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 Union Square yet
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Before you sign
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Questions about 233 Park Avenue South
How big is 233 Park Avenue South?
233 Park Avenue South has about 142,000 square feet of floor area in total, including 137,000 square feet of office and 5,000 square feet of retail, according to NYC PLUTO 26v2. These are the city's estimates for the whole building, not space that is available.
When was 233 Park Avenue South built?
City records list 1909 as the year built, with a major alteration recorded in 1987. The building is 12 floors tall.
What other addresses does 233 Park Avenue South have?
City records list 100 East 19th Street and 229-233 Park Avenue South on the same tax lot (BBL 1008740004) as 233 Park Avenue South. A space listed on Leasemark at any of these addresses shows up on this page.
What is the ZIP code of 233 Park Avenue South?
233 Park Avenue South is in ZIP code 10003, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The full mailing address is 233 Park Avenue South, New York, NY 10003, in Union Square.
What is the zoning at 233 Park Avenue South?
The lot is in the C6-4A zoning district. PLUTO lists a built floor area ratio (FAR) of 11.56 and a maximum commercial FAR of 10 for this lot.
What subway station is closest to 233 Park Avenue South?
The closest subway station to 233 Park Avenue South is 14 St-Union Sq (the 4, 5, 6, L, N, Q, R and W trains), about 950 feet away in a straight line, roughly 4 minutes on foot. The MTA lists it as an accessible station. Also nearby: 23 St-Baruch College (the 6 train), 4 min walk; 23 St (the R and W trains), 6 min walk. Walking times are straight-line estimates; the street route is longer.
Who owns 233 Park Avenue South?
The NYC Department of Finance's 2026/27 assessment roll lists 225 FOURTH LLC as the owner of record of 233 Park Avenue South (BBL 1008740004). 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.
Does 233 Park Avenue South have an energy grade?
233 Park Avenue South'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 50.9 kBtu per square foot, about the same as the national median of 52.8 for a similar property. Its greenhouse gas emissions were about 3,387 metric tons of CO2e (5.14 kg per square foot). The filing covers 2 tax lots together, so these figures are for the whole property.
Does 233 Park Avenue South meet Local Law 97?
At its 2024 energy use, 233 Park Avenue South comes to about 2,708 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 5,063 tons for 2024 to 2029 (53% of the limit), so it would owe no penalty. From 2030 the limit drops to 1,773 tons and the same energy use counts as about 1,766 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 233 Park Avenue South?
In the 12 months to October 2026, the Department of Buildings issued first permits for 3 jobs at 233 Park Avenue South. In the last two years, interior work was permitted on 6 floors (floors 2 to 4, 8, 12 and 13). The newest build-out, on floor 2, was first permitted in August 2026 (construction, structural; filed cost estimate $40,000). These are the Department of Buildings' DOB NOW work permits for tax lot 1008740004. 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 233 Park Avenue South?
The Department of Finance's 2026/27 assessment roll lists a taxable value of $27.2 million for 233 Park Avenue South. At the Class 4 rate of 10.848% (tax year 2025/26, the latest rate the Department of Finance lists), that is about $2.95 million a year, roughly $20.74 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1008740004 show the actual bill.
What is the assessed value of 233 Park Avenue South?
For tax year 2026/27, the NYC Department of Finance puts the market value of 233 Park Avenue South at $60.4 million ($18.6 million of it land) and its assessed value at $27.2 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 4% from 2022/23 ($58.3 million) to 2026/27.
Are there vacant storefronts at 233 Park Avenue South?
Owners registered 2 storefronts at 233 Park Avenue South for December 31, 2025, the newest annual filing the city has published, and none stood vacant that day. 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 233 Park Avenue South?
No space at 233 Park Avenue South 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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