Professional building · Bay Ridge, Brooklyn
6740 4th Avenue
Brooklyn, NY 11220
6740 4th Avenue is a 4-floor professional building in Bay Ridge, Brooklyn, built in 1920, with about 52,000 square feet of office space according to city records.
Also at 6734-6748 4th Avenue and 374-384 Senator Street.
- Office space
- 52K SF
- Floors
- 4
- Year built
- 1920
- Zoning
- R7B
No space at 6740 4th Avenue 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.
NYC tax lot records
Building facts
- Other addresses
- 6734-6748 4th Avenue; 374-384 Senator Street
- ZIP code
- 11220
- Building type
- Professional building (city class O7)
- Total floor area
- 51,930 SF
- Commercial floor area
- 51,930 SF
- Office
- 51,930 SF
- Height
- 4 floors
- Year built
- 1920
- Last major alteration
- 2019
- Lot area
- 13,420 SF
- Zoning district
- R7B
- Built FAR
- 3.87
- Tax lot (BBL)
- 3058540036
Nearest subway
- Bay Ridge Av
- 77 St
- 59 St
Source: NYC Department of City Planning, PLUTO 26v2, pulled 2026-09-30; addresses from the Property Address Directory (PAD) 26b; subway stations from the MTA Subway Stations dataset, pulled 2026-09-30. Floor areas are the city's estimates for the whole building, not available space. Walking times are straight-line estimates.
NYC Department of Finance records
Owner, property tax and assessed value
The Department of Finance lists 6740 OWNER LLC as the owner of record. For tax year 2026/27 the city values 6740 4th Avenue at $15.7 million and assesses it at $7.07 million. After phase-ins and exemptions its taxable value is $6.45 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 $699,270 a year before abatements, roughly $13.47 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
- 6740 OWNER LLC
- Tax class
- Class 4 (commercial and industrial)
- City market value
- $15,714,000
- Land market value
- $1,208,000
- Assessed value
- $7,071,300
- Taxable value (phased in)
- $6,446,070
- Estimated yearly tax
- About $699,270
- Tax per SF of floor area
- About $13.47
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 2026-09-30; 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.
NYC energy benchmarking (Local Law 84)
Energy use and emissions
6740 4th Avenue's 2024 Local Law 84 benchmarking filing got no ENERGY STAR score (no single use that ENERGY STAR scores covers more than half of the floor area), 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 146 kBtu per square foot, 2.3 times the national median of 64.8 for a similar property. Its greenhouse gas emissions were about 780 metric tons of CO2e (13.36 kg per square foot).
- ENERGY STAR score (2024)
- None given
- Property type (Portfolio Manager)
- Ambulatory Surgical Center
- Site energy use intensity
- 146 kBtu/SF
- National median for the type
- 64.8 kBtu/SF
- Greenhouse gas emissions
- 780 t CO2e
- Emissions per SF
- 13.36 kg CO2e
- Floor area in the filing
- 58,381 SF
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 2026-09-30; grade cutoffs from the Department of Buildings energy grades page. Figures are as the owner filed them in ENERGY STAR Portfolio Manager.
Before you sign
Plain-English guides to square footage, rent and lease terms in New York, and free calculators to run your own numbers.
How much office space do you need per employee in 2026
About 150 to 260 rentable SF per employee in NYC when everyone comes in, less with shared desks: tables by team size and layout, then how to size from your busiest day.
Rentable vs usable square feet and the loss factor, explained
Rentable vs usable square feet in NYC: what the loss factor is, how to calculate it, and why two 5,000 SF suites at the same rent can be very different deals.
Gross vs net leases in NYC: what tenants actually pay
Gross, modified gross or triple net: how NYC leases split taxes, operating costs and electricity, what the asking rent leaves out, and how to compare two spaces fairly.
Questions about 6740 4th Avenue
How big is 6740 4th Avenue?
6740 4th Avenue has about 52,000 square feet of floor area in total, including 52,000 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 6740 4th Avenue built?
City records list 1920 as the year built, with a major alteration recorded in 2019. The building is 4 floors tall.
What other addresses does 6740 4th Avenue have?
City records list 6734-6748 4th Avenue and 374-384 Senator Street on the same tax lot (BBL 3058540036) as 6740 4th Avenue. A space listed on Leasemark at any of these addresses shows up on this page.
What is the ZIP code of 6740 4th Avenue?
6740 4th Avenue is in ZIP code 11220, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The full mailing address is 6740 4th Avenue, Brooklyn, NY 11220, in Bay Ridge.
What is the zoning at 6740 4th Avenue?
The lot is in the R7B zoning district. PLUTO lists a built floor area ratio (FAR) of 3.87 for this lot.
What subway station is closest to 6740 4th Avenue?
The closest subway station to 6740 4th Avenue is Bay Ridge Av (the R train), about 350 feet away in a straight line, roughly 1 minute on foot. Also nearby: 77 St (the R train), 9 min walk; 59 St (the N and R trains), 9 min walk. Walking times are straight-line estimates; the street route is longer.
Who owns 6740 4th Avenue?
The NYC Department of Finance's 2026/27 assessment roll lists 6740 OWNER LLC as the owner of record of 6740 4th Avenue (BBL 3058540036). 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 6740 4th Avenue have an energy grade?
6740 4th Avenue's 2024 Local Law 84 benchmarking filing got no ENERGY STAR score (no single use that ENERGY STAR scores covers more than half of the floor area), 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 146 kBtu per square foot, 2.3 times the national median of 64.8 for a similar property. Its greenhouse gas emissions were about 780 metric tons of CO2e (13.36 kg per square foot).
What are the property taxes at 6740 4th Avenue?
The Department of Finance's 2026/27 assessment roll lists a taxable value of $6.45 million for 6740 4th Avenue. At the Class 4 rate of 10.848% (tax year 2025/26, the latest rate the Department of Finance lists), that is about $699,270 a year, roughly $13.47 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 3058540036 show the actual bill.
What is the assessed value of 6740 4th Avenue?
For tax year 2026/27, the NYC Department of Finance puts the market value of 6740 4th Avenue at $15.7 million ($1.21 million of it land) and its assessed value at $7.07 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 55% from 2022/23 ($10.1 million) to 2026/27.
Is there office space for lease at 6740 4th Avenue?
No space at 6740 4th 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.
Bay Ridge
Transit hubs in Bay Ridge
- R at 86 St
- R at 77 St
- R at Bay Ridge Av
- R at Bay Ridge-95 St