Office building with commercial space · Midtown South, Manhattan
366 Fifth Avenue
New York, NY 10001
366 Fifth Avenue is a 12-floor office building with commercial space in Midtown South, Manhattan, built in 1908, with about 135,000 square feet of office space according to city records.
Also at 366-370 Fifth Avenue and 2 West 35th Street.
- Office space
- 135K SF
- Floors
- 12
- Year built
- 1908
- Zoning
- C5-3
The 51st largest of the 184 office buildings we track in Midtown South. Compare it with 6 neighbors
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Compared with its neighbors
How 366 Fifth Avenue compares
Next to the 6 nearest large office buildings, all within a 1 minute walk, 366 Fifth Avenue ranks 2nd of 7 by office floor area. It went up in 1908; the median neighbor dates from 1908. Its estimated property tax, about $12.73 a square foot of floor area before abatements, is below the neighbors' median of $23.17.
| Building | Office space | Floors | Built | Tax / SF |
|---|---|---|---|---|
| 366 Fifth Avenue | 135K SF | 12 | 1908 | $12.73 |
| 358 Fifth Avenue | 106K SF | 13 | 1920 | $22.53 |
| 1 West 34th Street | 50K SF | 12 | 1906 | $34.31 |
| 7 West 34th Street | 408K SF | 12 | 1910 | $23.82 |
| 3 West 35th Street | 81K SF | 12 | 1912 | $11.02 |
| Gorham Building, 386 Fifth Avenue | 125K SF | 9 | 1906 | $13.44 |
| 15 West 34th Street | 37K SF | 8 | 1907 | $34.42 |
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
- 366-370 Fifth Avenue; 2 West 35th Street
- ZIP code
- 10001
- Building type
- Office building with commercial space (city class O6)
- Total floor area
- 147,595 SF
- Commercial floor area
- 147,595 SF
- Office
- 135,368 SF
- Retail
- 12,227 SF
- Height
- 12 floors
- Average floor
- About 12,300 SF (floor area divided by floors)
- Year built
- 1908
- Lot area
- 12,862 SF
- Zoning district
- C5-3
- Built FAR
- 11.48
- Max commercial FAR
- 15
- Tax lot (BBL)
- 1008360043
Nearest subway
- 34 St-Herald Sq
- 33 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 Department of Finance records
Owner, property tax and assessed value
The Department of Finance lists RONBET 366 LLC as the owner of record. For tax year 2026/27 the city values 366 Fifth Avenue at $38.5 million and assesses it at $17.3 million. After phase-ins and exemptions its taxable value is $17.3 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 $1.88 million a year before abatements, roughly $12.73 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
- RONBET 366 LLC
- Tax class
- Class 4 (commercial and industrial)
- City market value
- $38,486,000
- Land market value
- $17,000,000
- Assessed value
- $17,318,700
- Estimated yearly tax
- About $1.88 million
- Tax per SF of floor area
- About $12.73
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.
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NYC energy benchmarking (Local Law 84)
Energy score, grade and emissions
366 Fifth Avenue 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 61.3 kBtu per square foot, 49% below the national median of 121.3 for a similar property. Its greenhouse gas emissions were about 818 metric tons of CO2e (5.3 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
- 61.3 kBtu/SF
- National median for the type
- 121.3 kBtu/SF
- Greenhouse gas emissions
- 818 t CO2e
- Emissions per SF
- 5.3 kg CO2e
- Floor area in the filing
- 154,340 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, 366 Fifth Avenue comes to about 732 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 1,170 tons for 2024 to 2029 (63% of the limit), so it would owe no penalty. From 2030 the limit drops to 408 tons and the same energy use counts as about 612 tons, about 204 tons over, or an estimated $55,000 a year unless the building cuts its emissions.
- Period
- 2024 to 2029
- Emissions limit
- 1,170 t CO2e
- Estimated emissions
- 732 t CO2e
- Under the limit by
- 438 t CO2e
- Estimated penalty a year
- None
- Period
- 2030 to 2034
- Emissions limit
- 408 t CO2e
- Estimated emissions
- 612 t CO2e
- Over the limit by
- 204 t CO2e
- Estimated penalty a year
- $55,000
Estimated from the owner's 2024 Local Law 84 filing, which reports energy by source and floor area by use: Office 141,478 SF; Retail Store 12,862 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 366 Fifth Avenue? 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 4 jobs at 366 Fifth Avenue. In the last two years, interior work was permitted on 4 floors (floors 1, 4, 5 and 10, the cellar and the mezzanine). The newest build-out, on floor 5, was first permitted in September 2026 (construction; filed cost estimate $300,000).
- New jobs, last 12 months
- 4
- Initial permits, last 12 months
- 12
- Newest job first permitted
- September 2026
- Interior build-outs, last 24 months
- 4
- Floors with interior work, last 24 months
- 1, 4, 5 and 10, cellar, mezzanine
Recent build-outs
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 2026-10-24 (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 Midtown South yet
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Before you sign
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Questions about 366 Fifth Avenue
How big is 366 Fifth Avenue?
366 Fifth Avenue has about 148,000 square feet of floor area in total, including 135,000 square feet of office and 12,000 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 366 Fifth Avenue built?
City records list 1908 as the year built. The building is 12 floors tall.
What other addresses does 366 Fifth Avenue have?
City records list 366-370 Fifth Avenue and 2 West 35th Street on the same tax lot (BBL 1008360043) as 366 Fifth Avenue. A space listed on Leasemark at any of these addresses shows up on this page.
What is the ZIP code of 366 Fifth Avenue?
366 Fifth Avenue is in ZIP code 10001, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The full mailing address is 366 Fifth Avenue, New York, NY 10001, in Midtown South.
What is the zoning at 366 Fifth Avenue?
The lot is in the C5-3 zoning district. PLUTO lists a built floor area ratio (FAR) of 11.48 and a maximum commercial FAR of 15 for this lot.
What subway station is closest to 366 Fifth Avenue?
The closest subway station to 366 Fifth Avenue is 34 St-Herald Sq (the B, D, F, M, N, Q, R and W trains), about 900 feet away in a straight line, roughly 4 minutes on foot. The MTA lists it as an accessible station. Also nearby: 33 St (the 6 train), 5 min walk; 28 St (the R and W trains), 7 min walk. Walking times are straight-line estimates; the street route is longer.
Who owns 366 Fifth Avenue?
The NYC Department of Finance's 2026/27 assessment roll lists RONBET 366 LLC as the owner of record of 366 Fifth Avenue (BBL 1008360043). 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.
What is the energy grade of 366 Fifth Avenue?
366 Fifth Avenue 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 61.3 kBtu per square foot, 49% below the national median of 121.3 for a similar property. Its greenhouse gas emissions were about 818 metric tons of CO2e (5.3 kg per square foot).
Does 366 Fifth Avenue meet Local Law 97?
At its 2024 energy use, 366 Fifth Avenue comes to about 732 metric tons of CO2e a year under Local Law 97's coefficients, against a limit of 1,170 tons for 2024 to 2029 (63% of the limit), so it would owe no penalty. From 2030 the limit drops to 408 tons and the same energy use counts as about 612 tons, about 204 tons over, or an estimated $55,000 a year unless the building cuts its emissions. 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 366 Fifth Avenue?
In the 12 months to October 2026, the Department of Buildings issued first permits for 4 jobs at 366 Fifth Avenue. In the last two years, interior work was permitted on 4 floors (floors 1, 4, 5 and 10, the cellar and the mezzanine). The newest build-out, on floor 5, was first permitted in September 2026 (construction; filed cost estimate $300,000). These are the Department of Buildings' DOB NOW work permits for tax lot 1008360043. 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 366 Fifth Avenue?
The Department of Finance's 2026/27 assessment roll lists a taxable value of $17.3 million for 366 Fifth Avenue. At the Class 4 rate of 10.848% (tax year 2025/26, the latest rate the Department of Finance lists), that is about $1.88 million a year, roughly $12.73 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1008360043 show the actual bill.
What is the assessed value of 366 Fifth Avenue?
For tax year 2026/27, the NYC Department of Finance puts the market value of 366 Fifth Avenue at $38.5 million ($17 million of it land) and its assessed value at $17.3 million, the 45% of market value the city assesses for Class 4 property. The city's market value fell 12% from 2022/23 ($43.8 million) to 2026/27.
Is there office space for lease at 366 Fifth Avenue?
No space at 366 Fifth 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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Midtown South
Transit hubs in Midtown South
- R W at 28 St
- 6 at 28 St
- F M at 23 St