Want · Office
Series B fintech needs 8,000 to 12,000 SF
Posted by the tenant · Fintech
- Where
- Midtown South, Flatiron +1
- Size
- 8,000 to 12,000 SF
- Budget
- to $85/SF
- Move in
- Jan 2027
Near subwayHigh ceilings
Owners: got a fit?I have a fit
Office building · Midtown South, Manhattan
451 Park Avenue South
New York, NY 10016
451 Park Avenue South is a 10-floor office building in Midtown South, Manhattan, built in 1915, with about 48,000 square feet of office space according to city records.
Also at 451-453 Park Avenue South.
- Office space
- 48K SF
- Floors
- 10
- Year built
- 1915
- Zoning
- C6-4A
The 162nd largest of the 184 office buildings we track in Midtown South. Compare it with 6 neighbors
No space at 451 Park Avenue South 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. Nothing free right now? Get tenant alerts for Midtown South and hear the moment a tenant posts a requirement there.
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Compared with its neighbors
How 451 Park Avenue South compares
Next to the 6 nearest large office buildings, all within a 1 minute walk, 451 Park Avenue South is the smallest by office floor area. It went up in 1915; the median neighbor dates from 1919. Its estimated property tax, about $11.44 a square foot of floor area before abatements, is close to the neighbors' median of $12.00.
| Building | Office space | Floors | Built | Tax / SF |
|---|---|---|---|---|
| 451 Park Avenue South | 48K SF | 10 | 1915 | $11.44 |
| 443 Park Avenue South | 67K SF | 11 | 1910 | $11.44 |
| 461 Park Avenue South | 50K SF | 12 | 1935 | $10.41 |
| 450 Park Avenue South | 156K SF | 12 | 1912 | $12.41 |
| 471 Park Avenue South | 399K SF | 34 | 1970 | $11.59 |
| 434 Park Avenue South | 136K SF | 16 | 1913 | $14.96 |
| 462 Park Avenue South | 195K SF | 17 | 1925 | $17.56 |
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 address
- 451-453 Park Avenue South
- ZIP code
- 10016
- Building type
- Office building (city class O3)
- Total floor area
- 48,095 SF
- Commercial floor area
- 48,095 SF
- Office
- 48,095 SF
- Height
- 10 floors
- Average floor
- About 4,800 SF (floor area divided by floors)
- Year built
- 1915
- Last major alteration
- 1988
- Lot area
- 4,938 SF
- Zoning district
- C6-4A
- Built FAR
- 9.74
- Max commercial FAR
- 10
- Tax lot (BBL)
- 1008860005
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
The Department of Finance lists 451-453 PARK AVE SOUTH as the owner of record. For tax year 2026/27 the city values 451 Park Avenue South at $12.5 million and assesses it at $5.63 million. After phase-ins and exemptions its taxable value is $5.07 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 $550,400 a year before abatements, roughly $11.44 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
- 451-453 PARK AVE SOUTH
- Tax class
- Class 4 (commercial and industrial)
- City market value
- $12,518,000
- Land market value
- $4,500,000
- Assessed value
- $5,633,100
- Taxable value (phased in)
- $5,073,750
- Estimated yearly tax
- About $550,400
- Tax per SF of floor area
- About $11.44
City market value by tax year
Source: 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 2026-10-08; 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 451 Park Avenue South? List a space here free and we match it against every active requirement.
NYC energy benchmarking (Local Law 84)
Energy score, grade and emissions
451 Park Avenue South reported an ENERGY STAR score of 79 out of 100 for 2024 in its Local Law 84 benchmarking filing. Under Local Law 33 that score earns a B (70 to 84). Its site energy use came to 49.9 kBtu per square foot, 35% below the national median of 76.4 for a similar property. Its greenhouse gas emissions were about 276 metric tons of CO2e (5.03 kg per square foot).
- ENERGY STAR score (2024)
- 79 of 100
- Grade this score earns (Local Law 33)
- B (70 to 84)
- Property type (Portfolio Manager)
- Office
- Site energy use intensity
- 49.9 kBtu/SF
- National median for the type
- 76.4 kBtu/SF
- Greenhouse gas emissions
- 276 t CO2e
- Emissions per SF
- 5.03 kg CO2e
- Floor area in the filing
- 48,095 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
In the 12 months to October 2026, the Department of Buildings issued first permits for 1 job at 451 Park Avenue South.
- New jobs, last 12 months
- 1
- Initial permits, last 12 months
- 1
- Newest job first permitted
- January 2026
- Interior build-outs, last 24 months
- 0
- Facade and sidewalk jobs, last 24 months
- 1
New jobs by year
Build-outs across Midtown SouthWhere 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.
Office space nearby in Midtown South
Nothing is listed nearby yet. The labeled examples below show how a space appears; they are not on the market.
What a requirement here looks like
No live requirements for office space in Midtown South yet. These labeled examples show what tenants post. List a space in 451 Park Avenue South and we match it against every new one automatically.
Want · Office
Startup seeking furnished sublease
Posted by the tenant · Software
- Where
- Flatiron, Midtown South +1
- Size
- 6,000 to 11,000 SF
- Budget
- to $60/SF
- Move in
- Nov 2026
Furnished
Owners: got a fit?I have a fit
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Questions about 451 Park Avenue South
How big is 451 Park Avenue South?
451 Park Avenue South has about 48,000 square feet of floor area in total, including 48,000 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 451 Park Avenue South built?
City records list 1915 as the year built, with a major alteration recorded in 1988. The building is 10 floors tall.
What other addresses does 451 Park Avenue South have?
City records list 451-453 Park Avenue South on the same tax lot (BBL 1008860005) as 451 Park Avenue South. A space listed on Leasemark at any of these addresses shows up on this page.
What is the ZIP code of 451 Park Avenue South?
451 Park Avenue South is in ZIP code 10016, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The full mailing address is 451 Park Avenue South, New York, NY 10016, in Midtown South.
What is the zoning at 451 Park Avenue South?
The lot is in the C6-4A zoning district. PLUTO lists a built floor area ratio (FAR) of 9.74 and a maximum commercial FAR of 10 for this lot.
What subway station is closest to 451 Park Avenue South?
The closest subway station to 451 Park Avenue South is 33 St (the 6 train), about 500 feet away in a straight line, roughly 2 minutes on foot. Also nearby: 28 St (the 6 train), 3 min walk; 28 St (the R and W trains), 6 min walk. Walking times are straight-line estimates; the street route is longer.
Who owns 451 Park Avenue South?
The NYC Department of Finance's 2026/27 assessment roll lists 451-453 PARK AVE SOUTH as the owner of record of 451 Park Avenue South (BBL 1008860005). Deeds and mortgages for the lot are public in ACRIS, the city's property records system.
What is the energy grade of 451 Park Avenue South?
451 Park Avenue South reported an ENERGY STAR score of 79 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 79 earns a B. 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 49.9 kBtu per square foot, 35% below the national median of 76.4 for a similar property. Its greenhouse gas emissions were about 276 metric tons of CO2e (5.03 kg per square foot).
Is there construction at 451 Park Avenue South?
In the 12 months to October 2026, the Department of Buildings issued first permits for 1 job at 451 Park Avenue South. These are the Department of Buildings' DOB NOW work permits for tax lot 1008860005. 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 451 Park Avenue South?
The Department of Finance's 2026/27 assessment roll lists a taxable value of $5.07 million for 451 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 $550,400 a year, roughly $11.44 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1008860005 show the actual bill.
What is the assessed value of 451 Park Avenue South?
For tax year 2026/27, the NYC Department of Finance puts the market value of 451 Park Avenue South at $12.5 million ($4.5 million of it land) and its assessed value at $5.63 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 40% from 2022/23 ($8.97 million) to 2026/27.
Is there office space for lease at 451 Park Avenue South?
No space at 451 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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Midtown South
Transit hubs in Midtown South
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