5901 FLATLANDS AVENUE
Office building · Brooklyn · 11234
At a glance
5901 FLATLANDS AVENUE in Brooklyn, NY is listed on the New York City property roll as “Office building”, BBL 3077630012. The roll records 17,075 sq ft of building area, 2 floors, a 2021 build year and an assessed value of $1,628,100.
New York City assessment roll
Parcel record
| Field | Value |
|---|---|
| BBL | 3077630012 |
| Site address | 5901 FLATLANDS AVENUE |
| Land use (DOR) | O5 — Office building |
| Building area (actual) | 17,075 sq ft |
| Floors / units / buildings | 2 / 2 / 1 |
| Lot size | 25,921 sq ft |
| Year built | 2021 |
| Zoning (primary) | — |
| Land value | $583,200 |
| Building value | — |
| Total assessed value | $1,628,100 |
Recorded owner (assessment roll)
99 JAMES LLC
Owner mailing address: not listed
Location
- Address
- 5901 FLATLANDS AVENUE
- City
- Brooklyn
- ZIP
- 11234
- Coordinates
- 40.63219, -73.91934
Within ~650 m
Nearby office buildings
- 5613 FLATLANDS AVENUE0 tenants
27,600 sq ft · 2 fl · 1961
- 2035 RALPH AVENUE0 tenants
22,000 sq ft · 2 fl · 1986
- 5501 FOSTER AVENUE0 tenants
18,900 sq ft · 1 fl · 1970
- 1713 RALPH AVENUE0 tenants
9,056 sq ft · 2 fl · 1988
- 840 EAST 59 STREET0 tenants
8,490 sq ft · 2 fl · 2005
- 2004 RALPH AVENUE0 tenants
4,377 sq ft · 3 fl · 1975
How does 5901 FLATLANDS AVENUE compare with other New York office buildings?
At 17,075 sq ft, 5901 FLATLANDS AVENUE is about 75% smaller than the average office building on the New York City roll, which comes to 67,377 sq ft across 7,166 buildings.
Its assessed value works out to $95 per square foot of building area, against $157 across all office floor area on the roll.
What does “Office building” mean for this parcel?
The New York City roll classifies BBL 3077630012 as “Office building” (use code O5). BuildingCensus includes a parcel in its office census when the roll gives it an office-class use, so the label is the county's, not an inference.
Frequently asked questions
Who owns 5901 FLATLANDS AVENUE?
The recorded owner on the New York City assessment roll (current) is 99 JAMES LLC.
How big is 5901 FLATLANDS AVENUE?
The New York City roll records 17,075 sq ft of building area, 2 floors, a build year of 2021. It sits on a 25,921 sq ft lot.
What is the assessed value of 5901 FLATLANDS AVENUE?
$1,628,100 on the New York City roll. Assessed values are taxable-roll figures, not market prices.
What is the BBL for 5901 FLATLANDS AVENUE?
BBL 3077630012, site address 5901 FLATLANDS AVENUE, Brooklyn. It is the key to look the parcel up in the Department of City Planning PLUTO extract and Department of Finance rolling sales (New York City).
More around 5901 FLATLANDS AVENUE
Everything here comes from public records, and public records go stale. If you know better, say so.
Data provenance — public records only
- New York City — Department of City Planning PLUTO extract and Department of Finance rolling sales. The city publishes no owner mailing address, so landlord portfolios cannot be grouped here, and its business licences cover regulated trades rather than office tenants.
Every fact on this page is drawn from the government records above — no listing sites, no scraped platforms, no third-party images. Facts from public records are uncopyrightable; each tenancy row carries its source and match confidence. Records can lag reality — a business-tax receipt or registration at an address is evidence of occupancy, not a lease confirmation.
Working with New York office parcels? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
Dataset updated . Source: New York City assessment roll, BBL 3077630012.
About this data
Source: Department of City Planning PLUTO extract and Department of Finance rolling sales (New York City), as published September 11, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “5901 FLATLANDS AVENUE, Brooklyn, NY (BBL 3077630012)”, https://buildingcensus.com/offices/nyc/office-building-f4f479d1 (data as of September 11, 2026).