81 PROSPECT STREET
81 PROSPECT STREET is a Class O6 (office building) building in Brooklyn (BBL 3000640025) built in 1909, with 3 residential units across 9 floors.
The building is in NYC community district 302, council district 33, zoning district M1-6, on a 8,253-square-foot lot with a building footprint of 93,107 square feet.
The current registered owner of record per NYC PLUTO is 81 PROSPECT LLC.
The most recent ACRIS deed transfer for this BBL was recorded on May 28, 2024 when KC 81 PROSPECT OWNER LLC; RFR 81 PROSPECT OWNER LLC; RFR/K 81 PROSPECT OWNER LLC conveyed the property to 81 PROSPECT LLC for $33.75M. The transaction was recorded as cash (no paired mortgage instrument).
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
Most recent deed
Recent ACRIS documents (last 5)
Building stats
- Zoning:
- M1-6
- Lot size:
- 8,253 sqft
- Building area:
- 93,107 sqft
- Floors:
- 9
- Assessed value:
- $9.8M
- Community district:
- 302
- Council district:
- 33
HPD violations
Recent HPD violation details
- Class AInspected Dec 30, 2025§ 27-2053 ADM CODE POST SIGN ON WALL OF ENTRANCE STORY BEARING NAME, ADDRESS INCLUDING APARTMENT NUMBER IF ANY, AND TELEPHONE NUMBER OF SUPE…
- Class AInspected Dec 30, 2025§ 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 Dec 30, 2025§27-2045(B)(5) HMC, § 12-06, 12-10 RCNY POST A PROPER NOTICE OF CARBON MONOXIDE DETECTING DEVICE REQUIREMENTS, IN A FORM APPROVED BY COMMISS…
- Class AInspected Dec 30, 2025§27-2045(B)(5) HMC, § 12-01 RCNY POST A PROPER NOTICE OF SMOKE DETECTOR REQUIREMENTS, IN A FORM APPROVED BY THE COMMISSIONER, AT OR NEAR THE…
- Class AInspected Dec 30, 2025§ 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…
Recent ACRIS activity
Frequently asked questions about 81 PROSPECT STREET
Who owns 81 PROSPECT STREET?
The current registered owner of record for 81 PROSPECT STREET per NYC PLUTO is 81 PROSPECT LLC. The most recent ACRIS deed transfer for this BBL was recorded on May 28, 2024 when the property was conveyed to 81 PROSPECT 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 81 PROSPECT STREET last sold?
The most recent ACRIS deed transfer for 81 PROSPECT STREET was recorded on May 28, 2024, when KC 81 PROSPECT OWNER LLC; RFR 81 PROSPECT OWNER LLC; RFR/K 81 PROSPECT OWNER LLC conveyed the property to 81 PROSPECT LLC for $33.75M. The transaction was recorded as cash (no paired mortgage instrument).
How many HPD violations does 81 PROSPECT STREET have?
No open HPD housing-maintenance code violations are on record for 81 PROSPECT STREET. The building is not registered with NYC HPD's landlord-registration system, which is typical for owner-occupied 1-2 family dwellings. HPD violation data is pulled daily from the NYC Open Data violations feed.
What is the assessed value of 81 PROSPECT STREET?
NYC Department of Finance assesses 81 PROSPECT STREET at $9.77M 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 81 PROSPECT STREET and what does that mean?
81 PROSPECT STREET is NYC building class O6 — Office building. Office building. 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.