Office building with commercial space · Long Island City, Queens
21-01 51st Avenue
Long Island City, NY 11101
21-01 51st Avenue is a 3-floor office building with commercial space in Long Island City, Queens, built in 1913, with about 46,000 square feet of office space according to city records.
Also at 21-01 to 21-17 51st Avenue.
- Office space
- 46K SF
- Floors
- 3
- Year built
- 1913
- Zoning
- M3-2
The 43rd largest of the 48 office buildings we track in Long Island City. Compare it with 6 neighbors
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Compared with its neighbors
How 21-01 51st Avenue compares
Next to the 6 nearest large office buildings, all within a 6 minute walk, 21-01 51st Avenue is the smallest by office floor area. Built in 1913, it is the oldest of them. Its estimated property tax, about $12.96 a square foot of floor area before abatements, is above the neighbors' median of $8.96.
| Building | Office space | Floors | Built | Tax / SF | Last sale |
|---|---|---|---|---|---|
| 21-01 51st Avenue | 46K SF | 3 | 1913 | $12.96 | n/a |
| 21-09 Borden Avenue | 164K SF | 7 | 1930 | $8.78 | Dec 2025, $21.5M |
| 21-02 49th Avenue | 115K SF | 7 | 1916 | $9.15 | Mar 2026, $28M |
| 47-40 21st Street | 180K SF | 10 | 1930 | $9.89 | n/a |
| 24-02 49th Avenue | 655K SF | 7 | 1928 | $0.96 | n/a |
| 25-20 Borden Avenue | 89K SF | 1 | 1952 | $4.96 | n/a |
| 25-11 49th Avenue | 193K SF | 9 | 2019 | $10.81 | Jan 2022, $82.5M |
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 address
- 21-01 to 21-17 51st Avenue
- ZIP code
- 11101
- Building type
- Office building with commercial space (city class O5)
- Total floor area
- 45,977 SF
- Commercial floor area
- 45,977 SF
- Office
- 45,977 SF
- Height
- 3 floors
- Average floor
- About 15,300 SF (floor area divided by floors)
- Year built
- 1913
- Last major alteration
- 2019
- Lot area
- 18,766 SF
- Zoning district
- M3-2
- Built FAR
- 2.45
- Max commercial FAR
- 2
- Tax lot (BBL)
- 4000700001
Nearest subway
- Hunters Point Av
- 21 St
- Vernon Blvd-Jackson Av
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 MARTIAL ENTERPRISES INC as the owner of record. For tax year 2026/27 the city values 21-01 51st Avenue at $13.2 million and assesses it at $5.92 million. After phase-ins and exemptions its taxable value is $5.49 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 $596,082 a year before abatements, roughly $12.96 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
- MARTIAL ENTERPRISES INC
- Tax class
- Class 4 (commercial and industrial)
- City market value
- $13,151,000
- Land market value
- $1,501,000
- Assessed value
- $5,917,950
- Taxable value (phased in)
- $5,494,860
- Estimated yearly tax
- About $596,082
- Tax per SF of floor area
- About $12.96
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 2026-10-09; 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 21-01 51st Avenue? List a space here free and we match it against every active requirement.
NYC energy benchmarking (Local Law 84)
Energy score, grade and emissions
21-01 51st Avenue reported an ENERGY STAR score of 98 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 17.6 kBtu per square foot, less than half the national median of 57.2 for a similar property. Its greenhouse gas emissions were about 93.2 metric tons of CO2e (2.03 kg per square foot).
- ENERGY STAR score (2024)
- 98 of 100
- Grade this score earns (Local Law 33)
- A (85 or higher)
- Property type (Portfolio Manager)
- Office
- Site energy use intensity
- 17.6 kBtu/SF
- National median for the type
- 57.2 kBtu/SF
- Greenhouse gas emissions
- 93.2 t CO2e
- Emissions per SF
- 2.03 kg CO2e
- Floor area in the filing
- 45,977 SF
- ENERGY STAR certified
- 2025
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 2026-10-09; 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, 21-01 51st Avenue comes to about 69 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 349 tons for 2024 to 2029 (20% of the limit), so it would owe no penalty. From 2030 the limit drops to 124 tons and the same energy use counts as about 34 tons, still under the limit.
- Period
- 2024 to 2029
- Emissions limit
- 349 t CO2e
- Estimated emissions
- 69 t CO2e
- Under the limit by
- 280 t CO2e
- Estimated penalty a year
- None
- Period
- 2030 to 2034
- Emissions limit
- 124 t CO2e
- Estimated emissions
- 34 t CO2e
- Under the limit by
- 89 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 45,977 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.
Own or manage 21-01 51st Avenue? 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 21-01 51st Avenue in the 12 months to October 2026; the last one was first permitted in August 2025. In the last two years, interior work was permitted on one floor (floor 3). The newest build-out, on floor 3, was first permitted in August 2025 (mechanical; filed cost estimate $75,000).
- New jobs, last 12 months
- 0
- Initial permits, last 12 months
- 0
- Newest job first permitted
- August 2025
- Interior build-outs, last 24 months
- 1
- Floors with interior work, last 24 months
- 3
Recent build-outs
New jobs by year
Build-outs across Long Island CityWhere NYC offices are being built out
Source: NYC Department of Buildings, DOB NOW: Build Approved Permits, pulled 2026-10-09 (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 Long Island City
Nothing is listed nearby yet. The labeled examples below show how a space appears; they are not on the market.
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Questions about 21-01 51st Avenue
How big is 21-01 51st Avenue?
21-01 51st Avenue has about 46,000 square feet of floor area in total, including 46,000 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 21-01 51st Avenue built?
City records list 1913 as the year built, with a major alteration recorded in 2019. The building is 3 floors tall.
What other addresses does 21-01 51st Avenue have?
City records list 21-01 to 21-17 51st Avenue on the same tax lot (BBL 4000700001) as 21-01 51st Avenue. A space listed on Leasemark at any of these addresses shows up on this page.
What is the ZIP code of 21-01 51st Avenue?
21-01 51st Avenue is in ZIP code 11101, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The full mailing address is 21-01 51st Avenue, Long Island City, NY 11101.
What is the zoning at 21-01 51st Avenue?
The lot is in the M3-2 zoning district. PLUTO lists a built floor area ratio (FAR) of 2.45 and a maximum commercial FAR of 2 for this lot.
What subway station is closest to 21-01 51st Avenue?
The closest subway station to 21-01 51st Avenue is Hunters Point Av (the 7 train), about 350 feet away in a straight line, roughly 1 minute on foot. Also nearby: 21 St (the G train), 4 min walk; Vernon Blvd-Jackson Av (the 7 train), 5 min walk. Walking times are straight-line estimates; the street route is longer.
Who owns 21-01 51st Avenue?
The NYC Department of Finance's 2026/27 assessment roll lists MARTIAL ENTERPRISES INC as the owner of record of 21-01 51st Avenue (BBL 4000700001). Deeds and mortgages for the lot are public in ACRIS, the city's property records system.
What is the energy grade of 21-01 51st Avenue?
21-01 51st Avenue reported an ENERGY STAR score of 98 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 98 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 17.6 kBtu per square foot, less than half the national median of 57.2 for a similar property. Its greenhouse gas emissions were about 93.2 metric tons of CO2e (2.03 kg per square foot).
Does 21-01 51st Avenue meet Local Law 97?
At its 2024 energy use, 21-01 51st Avenue comes to about 69 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 349 tons for 2024 to 2029 (20% of the limit), so it would owe no penalty. From 2030 the limit drops to 124 tons and the same energy use counts as about 34 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 21-01 51st Avenue?
The Department of Buildings issued no permits for new jobs at 21-01 51st Avenue in the 12 months to October 2026; the last one was first permitted in August 2025. In the last two years, interior work was permitted on one floor (floor 3). The newest build-out, on floor 3, was first permitted in August 2025 (mechanical; filed cost estimate $75,000). These are the Department of Buildings' DOB NOW work permits for tax lot 4000700001. 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 21-01 51st Avenue?
The Department of Finance's 2026/27 assessment roll lists a taxable value of $5.49 million for 21-01 51st Avenue. At the Class 4 rate of 10.848% (tax year 2025/26, the latest rate the Department of Finance lists), that is about $596,082 a year, roughly $12.96 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 4000700001 show the actual bill.
What is the assessed value of 21-01 51st Avenue?
For tax year 2026/27, the NYC Department of Finance puts the market value of 21-01 51st Avenue at $13.2 million ($1.5 million of it land) and its assessed value at $5.92 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 26% from 2022/23 ($10.4 million) to 2026/27.
Is there office space for lease at 21-01 51st Avenue?
No space at 21-01 51st Avenue 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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