121 GUERNSEY STREET
121 GUERNSEY STREET is a Class A9 (one-family misc) building in Brooklyn (BBL 3026170035) built in 1931, with 1 residential unit across 1 floor.
The building is in NYC community district 301, council district 33, zoning district R6B, on a 2,500-square-foot lot with a building footprint of 2,500 square feet.
The current registered owner of record per NYC PLUTO is SWANSON, MICHAEL.
The most recent ACRIS deed transfer for this BBL was recorded on September 18, 2025 when SWANSON, MICHAEL; ZIEGLER, CHELSEA conveyed the property to SWANSON, MICHAEL for $611K. The transaction was financed with a $1.10M mortgage from Mers, Inc..
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:
- R6B
- Lot size:
- 2,500 sqft
- Building area:
- 2,500 sqft
- Floors:
- 1
- Assessed value:
- $134K
- Community district:
- 301
- Council district:
- 33
HPD violations
Recent HPD violation details
Recent ACRIS activity
Frequently asked questions about 121 GUERNSEY STREET
Who owns 121 GUERNSEY STREET?
The current registered owner of record for 121 GUERNSEY STREET per NYC PLUTO is SWANSON, MICHAEL. The most recent ACRIS deed transfer for this BBL was recorded on September 18, 2025 when the property was conveyed to SWANSON, MICHAEL. 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 121 GUERNSEY STREET last sold?
The most recent ACRIS deed transfer for 121 GUERNSEY STREET was recorded on September 18, 2025, when SWANSON, MICHAEL; ZIEGLER, CHELSEA conveyed the property to SWANSON, MICHAEL for $611K. The transaction was financed with a $1.10M mortgage from Mers, Inc..
How many HPD violations does 121 GUERNSEY STREET have?
No open HPD housing-maintenance code violations are on record for 121 GUERNSEY 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 121 GUERNSEY STREET?
NYC Department of Finance assesses 121 GUERNSEY STREET at $134K 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 121 GUERNSEY STREET and what does that mean?
121 GUERNSEY STREET is NYC building class A9 — One-family misc. Miscellaneous one-family dwelling. 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.