639 OSBORN STREET
639 OSBORN STREET is a Class C3 (walk-up, pre-1929) building in Brooklyn (BBL 3036380024) built in 1930, with 4 residential units across 2 floors.
The building is in NYC community district 316, council district 42, zoning district R6, on a 2,500-square-foot lot with a building footprint of 3,075 square feet.
The current registered owner of record per NYC PLUTO is OSBORN USA LLC.
The most recent ACRIS deed transfer for this BBL was recorded on January 30, 2025 when THE ESTATE OF EMMA JACKSON HUNT; THE ESTATE OF EMMA LEE HUNT; EMILY ELYSHEVITZ, EXECUTOR; EMILY ELYSHEVITZ, EXECUTOR; THE ESTATE OF EMMA JACKSON HUNT; THE ESTATE OF EMMA LEE HUNT conveyed the property to OSBORN USA LLC; OSBORN USA LLC for $770K. The transaction was financed with a $200K mortgage from Continental Capital Group Ll.
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 Unsdorfer
- Corporate OwnerOSBORN USA LLC
Most recent deed
Recent ACRIS documents (last 5)
Building stats
- Zoning:
- R6
- Lot size:
- 2,500 sqft
- Building area:
- 3,075 sqft
- Floors:
- 2
- Assessed value:
- $144K
- Community district:
- 316
- Council district:
- 42
HPD violations
Recent HPD violation details
- Class AInspected May 5, 2026(A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPD…
- Class CInspected Aug 26, 2025§ 27-2024 ADM CODE PROVIDE ADEQUATE SUPPLY OF HOT WATER FOR THE FIXTURES .. IN THE ENTIRE APARTMENT LOCATED AT APT 1R, 1st STORY, 1st APARTM…
- Class BInspected Aug 26, 2025§ 27-2026 ADM CODE REPAIR THE BROKEN OR DEFECTIVE CONNECTION WASTE LINE AT SINK IN THE KITCHEN LOCATED AT APT 1R, 1st STORY, 1st APARTMENT F…
- Class BInspected Aug 26, 2025§ 27-2070 ADM CODE PROVIDE AN ADEQUATE SUPPLY OF GAS TO THE FIXTURES AT RANGE IN THE KITCHEN LOCATED AT APT 1R, 1st STORY, 1st APARTMENT FRO…
- Class AInspected Jul 14, 2025§ 27-2010, 2011, 2012 ADM CODE REMOVE THE ACCUMULATION OF REFUSE AND/OR RUBBISH AND MAINTAIN IN A CLEAN CONDITION THE BUILDING FRONT YARD
Recent ACRIS activity
Frequently asked questions about 639 OSBORN STREET
Who owns 639 OSBORN STREET?
The current registered owner of record for 639 OSBORN STREET per NYC PLUTO is OSBORN USA LLC. The most recent ACRIS deed transfer for this BBL was recorded on January 30, 2025 when the property was conveyed to OSBORN USA LLC; OSBORN USA LLC. PLUTO ownership is refreshed monthly by NYC Department of Finance; the registered owner may not reflect transactions recorded within the last 30 days.
When was 639 OSBORN STREET last sold?
The most recent ACRIS deed transfer for 639 OSBORN STREET was recorded on January 30, 2025, when THE ESTATE OF EMMA JACKSON HUNT; THE ESTATE OF EMMA LEE HUNT; EMILY ELYSHEVITZ, EXECUTOR; EMILY ELYSHEVITZ, EXECUTOR; THE ESTATE OF EMMA JACKSON HUNT; THE ESTATE OF EMMA LEE HUNT conveyed the property to OSBORN USA LLC; OSBORN USA LLC for $770K. The transaction was financed with a $200K mortgage from Continental Capital Group Ll.
How many HPD violations does 639 OSBORN STREET have?
No open HPD housing-maintenance code violations are on record for 639 OSBORN 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 639 OSBORN STREET?
NYC Department of Finance assesses 639 OSBORN STREET at $144K 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 639 OSBORN STREET and what does that mean?
639 OSBORN STREET is NYC building class C3 — Walk-up, pre-1929. A walk-up apartment building constructed before 1929, typically 3-6 stories and often rent-stabilized. 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.