640 KOSCIUSZKO STREET
640 KOSCIUSZKO STREET is a Class C2 (walk-up, five to six) building in Brooklyn (BBL 3032520016) built in 1931, with 6 residential units across 3 floors.
The building is in NYC community district 304, council district 34, zoning district R6, on a 2,469-square-foot lot with a building footprint of 4,500 square feet.
The current registered owner of record per NYC PLUTO is 640 KOSCIUSKO LLC.
MetroDeeds shows no confirmed ACRIS deed transfer for this BBL in the last 5 years of recorded NYC public-records data.
The building is registered with NYC HPD's landlord-registration system and has no open HPD housing-maintenance code violations on record as of May 18, 2026.
Data sourced daily from NYC PLUTO (Department of City Planning), NYC ACRIS (Department of Finance), and NYC HPD housing-maintenance code violations.
Owner of record
HPD registered contacts
- Head OfficerDAVID RUBIN
- Corporate Owner640 KOSCIUSZKO LLC
- Managing AgentMark HALPERN
Most recent deed
Recent ACRIS documents (last 4)
Building stats
- Zoning:
- R6
- Lot size:
- 2,469 sqft
- Building area:
- 4,500 sqft
- Floors:
- 3
- Assessed value:
- $499K
- Community district:
- 304
- Council district:
- 34
HPD violations
Recent HPD violation details
- Class AInspected Oct 14, 2024§ 27-2104 ADM CODE POST AND MAINTAIN A PROPER SIGN ON WALL OF ENTRANCE STORY SHOWING THE REGISTRATION NUMBER ASSIGNED BY THE DEPARTMENT AND…
- Class CInspected Oct 14, 2024HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF MICE IN THE ENTIRE APARTMENT LOCATED AT APT 1, 1st STORY, 1st APARTMENT FROM N…
- Class AInspected Oct 14, 2024§ 27-2005 HMC: POST, IN A FORM APPROVED BY THE COMMISSIONER, AND MAINTAIN A NOTICE IN A COMMON AREA OF THE BUILDING REGARDING THE PROCEDURES…
- Class AInspected Oct 14, 2024§ 26-1103 ADMIN. CODE: POST AND MAINTAIN A PROPER NOTICE ON WALL OF THE ENTRANCE STORY IN ENGLISH AND SPANISH ON THE AVAILABILITY OF THE AGE…
- Class AInspected Oct 14, 2024§ 329, M/D LAW AND DEPT. RULES AND REGS. PROVIDE A COMPLETED CERTIFICATE OF INSPECTION VISITS IN A PROPER FRAME AT OR NEAR MAILBOXES, BOTTOM…
Recent ACRIS activity
Frequently asked questions about 640 KOSCIUSZKO STREET
Who owns 640 KOSCIUSZKO STREET?
The current registered owner of record for 640 KOSCIUSZKO STREET per NYC PLUTO is 640 KOSCIUSKO LLC. MetroDeeds shows no confirmed ACRIS deed transfer for this BBL in the last 5 years of recorded NYC public-records data.
When was 640 KOSCIUSZKO STREET last sold?
MetroDeeds shows no confirmed ACRIS deed transfer for 640 KOSCIUSZKO STREET in the last 5 years of recorded NYC public-records data. NYC ACRIS coverage extends back to 1966; an absence in our 5-year window typically means either the BBL has not transacted recently, or the most recent recorded document is not a DEED type (such as a refinance rather than a sale).
How many HPD violations does 640 KOSCIUSZKO STREET have?
No open HPD housing-maintenance code violations are on record for 640 KOSCIUSZKO STREET as of May 18, 2026. The building is registered with NYC HPD's landlord-registration system. HPD violation data is pulled daily from the NYC Open Data violations feed.
What is the assessed value of 640 KOSCIUSZKO STREET?
NYC Department of Finance assesses 640 KOSCIUSZKO STREET at $499K for the current tax year. NYC assesses property at a fraction of estimated market value (the assessment ratio varies by tax class — 6% for tax class 1 one-to-three-family dwellings, approximately 45% for tax class 2 rental apartment buildings), so the market value implied by this assessment is meaningfully higher. Assessment data is published by NYC Department of Finance.
What building class is 640 KOSCIUSZKO STREET and what does that mean?
640 KOSCIUSZKO STREET is NYC building class C2 — Walk-up, five to six. A 3-to-6-story walk-up apartment building, 5-6 residential units. Building class is assigned by NYC Department of Finance and recorded in PLUTO; it determines the property's tax class and the regulatory regime that applies.