350 CLASSON AVENUE
Office building · Brooklyn · 11238
At a glance
350 CLASSON AVENUE in Brooklyn, NY is listed on the New York City property roll as “Office building”, BBL 3019480035. The roll records 30,238 sq ft of building area, 5 floors, a 1948 build year and an assessed value of $1,688,850.
New York City assessment roll
Parcel record
| Field | Value |
|---|---|
| BBL | 3019480035 |
| Site address | 350 CLASSON AVENUE |
| Land use (DOR) | O5 — Office building |
| Building area (actual) | 30,238 sq ft |
| Floors / units / buildings | 5 / 2 / 3 |
| Lot size | 10,200 sq ft |
| Year built | 1948 |
| Zoning (primary) | — |
| Land value | $183,600 |
| Building value | — |
| Total assessed value | $1,688,850 |
Recorded owner (assessment roll)
CHILD DEVELOPMENT SUPPORT CORPORATION
Owner mailing address: not listed
Location
- Address
- 350 CLASSON AVENUE
- City
- Brooklyn
- ZIP
- 11238
- Coordinates
- 40.68839, -73.96019
Within ~650 m
Nearby office buildings
- 500 DEKALB AVENUE0 tenants
56,112 sq ft · 6 fl · 1969
- 937 FULTON STREET0 tenants
27,450 sq ft · 3 fl · 1930
- 391 WILLOUGHBY AVENUE0 tenants
21,216 sq ft · 6 fl · 2014
- 223 SPENCER STREET0 tenants
19,706 sq ft · 7 fl · 2018
- 31 QUINCY STREET0 tenants
9,966 sq ft · 2 fl · 1930
- 32 MADISON STREET0 tenants
7,760 sq ft · 3 fl · 1930
How does 350 CLASSON AVENUE compare with other New York office buildings?
At 30,238 sq ft, 350 CLASSON AVENUE is about 55% 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 $56 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 3019480035 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 350 CLASSON AVENUE?
The recorded owner on the New York City assessment roll (current) is CHILD DEVELOPMENT SUPPORT CORPORATION.
How big is 350 CLASSON AVENUE?
The New York City roll records 30,238 sq ft of building area, 5 floors, a build year of 1948. It sits on a 10,200 sq ft lot.
What is the assessed value of 350 CLASSON AVENUE?
$1,688,850 on the New York City roll. Assessed values are taxable-roll figures, not market prices.
What is the BBL for 350 CLASSON AVENUE?
BBL 3019480035, site address 350 CLASSON 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 350 CLASSON 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.
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Dataset updated . Source: New York City assessment roll, BBL 3019480035.
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, “350 CLASSON AVENUE, Brooklyn, NY (BBL 3019480035)”, https://buildingcensus.com/offices/nyc/office-building-ded39fe2 (data as of September 11, 2026).