Office condominium · Midtown, Manhattan
809 First Avenue
New York, NY 10017
809 First Avenue is an 11-floor office condominium in Midtown, Manhattan, built in 1964, with about 103,000 square feet of office space according to city records.
Also at 809-817 First Avenue and 809-817 United Nations Plaza.
- Office space
- 103K SF
- Floors
- 11
- Year built
- 1964
- Zoning
- C5-2
The 231st largest of the 351 office buildings we track in Midtown. Compare it with 6 neighbors
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Compared with its neighbors
How 809 First Avenue compares
Next to the 6 nearest large office buildings, all within a 2 minute walk, 809 First Avenue ranks 6th of 7 by office floor area. It went up in 1964; the median neighbor dates from 1995. Its property tax is fully exempt on the city's assessment roll.
| Building | Office space | Floors | Built | Tax / SF |
|---|---|---|---|---|
| 809 First Avenue | 103K SF | 11 | 1964 | Exempt |
| 821 First Avenue | 116K SF | 35 | 2018 | Exempt |
| 799 First Avenue | 325K SF | 26 | 2006 | Exempt |
| 787 First Avenue | 373K SF | 39 | 1977 | $3.68 |
| 323 East 44th Street | 365K SF | 39 | 1984 | $2.68 |
| 315 East 46th Street | 50K SF | 9 | 2018 | Exempt |
| 304 East 45th Street | 232K SF | 17 | 1929 | $0.32 |
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
- 809-817 First Avenue; 809-817 United Nations Plaza
- ZIP code
- 10017
- Building type
- Office condominium (city class RB)
- Total floor area
- 102,986 SF
- Commercial floor area
- 102,986 SF
- Office
- 102,986 SF
- Height
- 11 floors
- Average floor
- About 9,400 SF (floor area divided by floors)
- Year built
- 1964
- Lot area
- 9,200 SF
- Zoning district
- C5-2
- Built FAR
- 11.19
- Max commercial FAR
- 10
- Tax lot (BBL)
- 1013387503
Nearest subway
- Grand Central-42 St
- Lexington Av/53 St
- 5 Av/53 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
809 First Avenue is a condominium of 8 tax lots. STATE OF QATAR, one of 2 owners of record on the roll, owns the units that make up 83% of its market value. For tax year 2026/27 the city values 809 First Avenue at $47.6 million and assesses it at $21.4 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
- STATE OF QATAR (83% of market value)
- Tax class
- Class 4 (commercial and industrial)
- City market value
- $47,605,000
- Land market value
- $7,570,000
- Assessed value
- $21,422,250
- Exemptions
- $21,422,250
- Estimated yearly tax
- Fully exempt on the roll
- Condominium tax lots
- 8
- Owners of record
- 2
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 8 condominium tax lots; owner names as the roll records them, which cuts some long names short), pulled 2026-10-16. 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
809 First Avenue reported an ENERGY STAR score of 70 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 60.8 kBtu per square foot, 25% below the national median of 80.8 for a similar property. Its greenhouse gas emissions were about 778 metric tons of CO2e (6.17 kg per square foot).
- ENERGY STAR score (2024)
- 70 of 100
- Grade this score earns (Local Law 33)
- B (70 to 84)
- Property type (Portfolio Manager)
- Office
- Site energy use intensity
- 60.8 kBtu/SF
- National median for the type
- 80.8 kBtu/SF
- Greenhouse gas emissions
- 778 t CO2e
- Emissions per SF
- 6.17 kg CO2e
- Floor area in the filing
- 126,086 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.
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 6 jobs at 809 First Avenue. In the last two years, interior work was permitted on 13 floors (floors 1 to 13). The newest build-out, on floors 2 to 13 and the facade, was first permitted in September 2026 (construction; filed cost estimate $3 million). A sidewalk shed permit here is active until October 29, 2026.
- New jobs, last 12 months
- 6
- Initial permits, last 12 months
- 6
- Newest job first permitted
- September 2026
- Interior build-outs, last 24 months
- 5
- Floors with interior work, last 24 months
- 1 to 13
- Facade and sidewalk jobs, last 24 months
- 3
- Sidewalk shed permit
- Active until Oct 29, 2026
Recent build-outs
New jobs by year
Build-outs across MidtownWhere 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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Next door, in the Upper East Side
783 Madison 4th Floor
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Questions about 809 First Avenue
How big is 809 First Avenue?
809 First Avenue has about 103,000 square feet of floor area in total, including 103,000 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 809 First Avenue built?
City records list 1964 as the year built. The building is 11 floors tall.
What other addresses does 809 First Avenue have?
City records list 809-817 First Avenue and 809-817 United Nations Plaza on the same tax lot (BBL 1013387503) as 809 First Avenue. A space listed on Leasemark at any of these addresses shows up on this page.
What is the ZIP code of 809 First Avenue?
809 First Avenue is in ZIP code 10017, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The full mailing address is 809 First Avenue, New York, NY 10017, in Midtown.
What is the zoning at 809 First Avenue?
The lot is in the C5-2 zoning district. PLUTO lists a built floor area ratio (FAR) of 11.19 and a maximum commercial FAR of 10 for this lot.
What subway station is closest to 809 First Avenue?
The closest subway station to 809 First Avenue is Grand Central-42 St (the 4, 5, 6, 7 and S trains), about 0.4 miles away in a straight line, roughly 8 minutes on foot. The MTA lists it as an accessible station. Also nearby: Lexington Av/53 St (the E, F and 6 trains, connected to 51 St), 9 min walk; 5 Av/53 St (the E and F trains), 14 min walk. Walking times are straight-line estimates; the street route is longer.
Who owns 809 First Avenue?
809 First Avenue is a condominium of 8 tax lots. STATE OF QATAR, one of 2 owners of record on the roll, owns the units that make up 83% of its market value. That is from the NYC Department of Finance's 2026/27 assessment roll (BBL 1013387503). Deeds and mortgages for each unit are public in ACRIS, the city's property records system.
What is the energy grade of 809 First Avenue?
809 First Avenue reported an ENERGY STAR score of 70 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 70 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 60.8 kBtu per square foot, 25% below the national median of 80.8 for a similar property. Its greenhouse gas emissions were about 778 metric tons of CO2e (6.17 kg per square foot).
Is there construction at 809 First Avenue?
In the 12 months to October 2026, the Department of Buildings issued first permits for 6 jobs at 809 First Avenue. In the last two years, interior work was permitted on 13 floors (floors 1 to 13). The newest build-out, on floors 2 to 13 and the facade, was first permitted in September 2026 (construction; filed cost estimate $3 million). A sidewalk shed permit here is active until October 29, 2026. These are the Department of Buildings' DOB NOW work permits for tax lot 1013387503. 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 809 First Avenue?
The Department of Finance's 2026/27 assessment roll lists exemptions covering the whole taxable value of 809 First Avenue (the sum of its 8 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 1013387503 show what is actually billed.
What is the assessed value of 809 First Avenue?
For tax year 2026/27, the NYC Department of Finance puts the market value of 809 First Avenue at $47.6 million ($7.57 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 39% from 2022/23 ($34.1 million) to 2026/27.
Is there office space for lease at 809 First Avenue?
No space at 809 First Avenue is listed on Leasemark right now. Nearby on Leasemark: office space for lease at 783 Madison 4th Floor in the Upper East Side (994 SF, $66.40/SF/yr). 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
Transit hubs in Midtown
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- N Q R W at Times Sq