140 21 STREET
Office building · Brooklyn · 11232
At a glance
140 21 STREET in Brooklyn, NY is listed on the New York City property roll as “Office building”, BBL 3006420019. The roll records 10,000 sq ft of building area, 1 floors, a 1935 build year and an assessed value of $757,800.
New York City assessment roll
Parcel record
| Field | Value |
|---|---|
| BBL | 3006420019 |
| Site address | 140 21 STREET |
| Land use (DOR) | O5 — Office building |
| Building area (actual) | 10,000 sq ft |
| Floors / units / buildings | 1 / 2 / 1 |
| Lot size | 10,017 sq ft |
| Year built | 1935 |
| Zoning (primary) | — |
| Land value | $157,950 |
| Building value | — |
| Total assessed value | $757,800 |
Recorded owner (assessment roll)
21ST STREET REALTY
Owner mailing address: not listed
Location
- Address
- 140 21 STREET
- City
- Brooklyn
- ZIP
- 11232
- Coordinates
- 40.66326, -73.99705
Within ~650 m
Nearby office buildings
- 20 STREET0 tenants
218,566 sq ft · 5 fl · 2023
- 84 14 STREET0 tenants
27,822 sq ft · 4 fl · 2018
- 19 STREET0 tenants
27,270 sq ft · 1 fl · 1930
- 164 20 STREET0 tenants
26,520 sq ft · 4 fl · 2005
- 157 13 STREET0 tenants
24,840 sq ft · 3 fl · 1931
- 159 20 STREET0 tenants
19,015 sq ft · 4 fl · 1971
How does 140 21 STREET compare with other New York office buildings?
At 10,000 sq ft, 140 21 STREET is less than a fifth the size of 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 $76 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 3006420019 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 140 21 STREET?
The recorded owner on the New York City assessment roll (current) is 21ST STREET REALTY.
How big is 140 21 STREET?
The New York City roll records 10,000 sq ft of building area, 1 floors, a build year of 1935. It sits on a 10,017 sq ft lot.
What is the assessed value of 140 21 STREET?
$757,800 on the New York City roll. Assessed values are taxable-roll figures, not market prices.
What is the BBL for 140 21 STREET?
BBL 3006420019, site address 140 21 STREET, 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 140 21 STREET
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 3006420019.
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, “140 21 STREET, Brooklyn, NY (BBL 3006420019)”, https://buildingcensus.com/offices/nyc/office-building-f76e5499 (data as of September 11, 2026).