821 45 STREET
Office building · Brooklyn · 11220
At a glance
821 45 STREET in Brooklyn, NY is listed on the New York City property roll as “Office building”, BBL 3007420069. The roll records 16,837 sq ft of building area, 8 floors, a 2015 build year and an assessed value of $1,347,300.
New York City assessment roll
Parcel record
| Field | Value |
|---|---|
| BBL | 3007420069 |
| Site address | 821 45 STREET |
| Land use (DOR) | O7 — Office building |
| Building area (actual) | 16,837 sq ft |
| Floors / units / buildings | 8 / 8 / 1 |
| Lot size | 3,005 sq ft |
| Year built | 2015 |
| Zoning (primary) | — |
| Land value | $81,000 |
| Building value | — |
| Total assessed value | $1,347,300 |
Recorded owner (assessment roll)
BXMK 821 LLC.
Owner mailing address: not listed
Location
- Address
- 821 45 STREET
- City
- Brooklyn
- ZIP
- 11220
- Coordinates
- 40.64372, -74.00001
Within ~650 m
Nearby office buildings
- 825 39TH STREET0 tenants
47,470 sq ft · 8 fl · 2019
- 4101 8 AVENUE0 tenants
19,200 sq ft · 5 fl · 1912
- 5211 8TH AVENUE0 tenants
18,447 sq ft · 5 fl
- 812 54 STREET0 tenants
18,220 sq ft · 5 fl · 2000
- 867 53 STREET0 tenants
15,965 sq ft · 7 fl
- 4901 FT HAMILTON PARKWAY0 tenants
13,440 sq ft · 3 fl · 1980
How does 821 45 STREET compare with other New York office buildings?
At 16,837 sq ft, 821 45 STREET 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 $80 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 3007420069 as “Office building” (use code O7). 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 821 45 STREET?
The recorded owner on the New York City assessment roll (current) is BXMK 821 LLC..
How big is 821 45 STREET?
The New York City roll records 16,837 sq ft of building area, 8 floors, a build year of 2015. It sits on a 3,005 sq ft lot.
What is the assessed value of 821 45 STREET?
$1,347,300 on the New York City roll. Assessed values are taxable-roll figures, not market prices.
What is the BBL for 821 45 STREET?
BBL 3007420069, site address 821 45 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 821 45 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.
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Dataset updated . Source: New York City assessment roll, BBL 3007420069.
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, “821 45 STREET, Brooklyn, NY (BBL 3007420069)”, https://buildingcensus.com/offices/nyc/office-building-5dd84fc8 (data as of September 11, 2026).