518 81 STREET
518 81 STREET is a Class B1 (two-family brick) building in Brooklyn (BBL 3059990013) built in 1930, with 2 residential units across 2 floors.
The building is in NYC community district 310, council district 47, zoning district R4-1, on a 2,833-square-foot lot with a building footprint of 2,336 square feet.
The current registered owner of record per NYC PLUTO is K GUNDERSEN UX.
The most recent ACRIS deed transfer for this BBL was recorded on January 22, 2026 when KEITH A. GUNDERSEN, AS EXECUTOR; ESTATE OF MARGARET L. GUNDERSEN; ESTATE OF MARGARET GUNDERSEN conveyed the property to BK 17 REALTY LLC for $1.55M. 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 1)
Building stats
- Zoning:
- R4-1
- Lot size:
- 2,833 sqft
- Building area:
- 2,336 sqft
- Floors:
- 2
- Assessed value:
- $76K
- Community district:
- 310
- Council district:
- 47
HPD violations
Recent HPD violation details
Recent ACRIS activity
Frequently asked questions about 518 81 STREET
Who owns 518 81 STREET?
The current registered owner of record for 518 81 STREET per NYC PLUTO is K GUNDERSEN UX. The most recent ACRIS deed transfer for this BBL was recorded on January 22, 2026 when the property was conveyed to BK 17 REALTY 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 518 81 STREET last sold?
The most recent ACRIS deed transfer for 518 81 STREET was recorded on January 22, 2026, when KEITH A. GUNDERSEN, AS EXECUTOR; ESTATE OF MARGARET L. GUNDERSEN; ESTATE OF MARGARET GUNDERSEN conveyed the property to BK 17 REALTY LLC for $1.55M. The transaction was recorded as cash (no paired mortgage instrument).
How many HPD violations does 518 81 STREET have?
No open HPD housing-maintenance code violations are on record for 518 81 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 518 81 STREET?
NYC Department of Finance assesses 518 81 STREET at $76K 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 518 81 STREET and what does that mean?
518 81 STREET is NYC building class B1 — Two-family brick. A two-family residential building of brick construction, typically owner-occupied. 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.