21 JEFFERSON AVENUE
21 JEFFERSON AVENUE is a Class C0 (walk-up, 3+ families) building in Brooklyn (BBL 3019950031) built in 1899, with 3 residential units across 3 floors.
The building is in NYC community district 303, council district 36, zoning district R6B, on a 2,100-square-foot lot with a building footprint of 3,520 square feet.
The current registered owner of record per NYC PLUTO is 21 JEFFERSON AVE LLC.
The most recent ACRIS deed transfer for this BBL was recorded on November 17, 2022 when MENTORE, ERROL conveyed the property to 21 JEFFERSON AVE LLC for a non-disclosed consideration. The transaction was recorded as cash (no paired mortgage instrument).
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
- Site ManagerERROL MENTORE
Most recent deed
Recent ACRIS documents (last 4)
Building stats
- Zoning:
- R6B
- Lot size:
- 2,100 sqft
- Building area:
- 3,520 sqft
- Floors:
- 3
- Assessed value:
- $132K
- Community district:
- 303
- Council district:
- 36
HPD violations
Recent HPD violation details
Recent ACRIS activity
Other buildings in this portfolio
- 221 JEFFERSON AVENUE22 violations
Frequently asked questions about 21 JEFFERSON AVENUE
Who owns 21 JEFFERSON AVENUE?
The current registered owner of record for 21 JEFFERSON AVENUE per NYC PLUTO is 21 JEFFERSON AVE LLC. The most recent ACRIS deed transfer for this BBL was recorded on November 17, 2022 when the property was conveyed to 21 JEFFERSON AVE 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 21 JEFFERSON AVENUE last sold?
The most recent ACRIS deed transfer for 21 JEFFERSON AVENUE was recorded on November 17, 2022, when MENTORE, ERROL conveyed the property to 21 JEFFERSON AVE LLC for a non-disclosed consideration. The transaction was recorded as cash (no paired mortgage instrument).
How many HPD violations does 21 JEFFERSON AVENUE have?
No open HPD housing-maintenance code violations are on record for 21 JEFFERSON AVENUE 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 21 JEFFERSON AVENUE?
NYC Department of Finance assesses 21 JEFFERSON AVENUE at $132K 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 21 JEFFERSON AVENUE and what does that mean?
21 JEFFERSON AVENUE is NYC building class C0 — Walk-up, 3+ families. A 3-to-6-story walk-up apartment building (no elevator), 3 or more 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.