550 EAST 21 STREET
550 EAST 21 STREET is a Class D1 (elevator, semi-fireproof) building in Brooklyn (BBL 3051840031) built in 1952, with 54 residential units across 6 floors.
The building is in NYC community district 314, council district 40, zoning district R7A, on a 15,000-square-foot lot with a building footprint of 48,500 square feet.
The current registered owner of record per NYC PLUTO is 550 EAST 21 LLC.
The most recent ACRIS deed transfer for this BBL was recorded on March 24, 2022 when KELLNER GARDENS, INC. conveyed the property to 550 EAST 21 LLC; MK2021 LLC; MAK 2021 LLC for $8.80M. The transaction was financed with a $31.35M mortgage from New York Community Bank.
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 OfficerYida Stern
- Corporate Owner550 East 21 LLC
Most recent deed
Recent ACRIS documents (last 2)
Building stats
- Zoning:
- R7A
- Lot size:
- 15,000 sqft
- Building area:
- 48,500 sqft
- Floors:
- 6
- Assessed value:
- $1.3M
- Community district:
- 314
- Council district:
- 40
HPD violations
Recent HPD violation details
- Class AInspected May 4, 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 Jan 7, 2026HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF ROACHES IN THE ENTIRE APARTMENT LOCATED AT APT 3E, 3rd STORY, 2nd APARTMENT FR…
- Class BInspected Dec 26, 2025§ 27-2026 ADM CODE REMOVE ALL OBSTRUCTIONS AND REPAIR ALL DEFECTS IN DRAINLINE AT BATHTUB IN THE BATHROOM LOCATED AT APT 6F, 6th STORY, 3rd…
- Class CInspected Dec 26, 2025§ 27-2005, 27-2007, 27-2041.1 HMC, §238, § 309; § 107 (2) ( C) MDL AND 28 RCNY §25-171: REPLACE OR REPAIR THE SELF-CLOSING DOORS THAT IS MIS…
- Class CInspected Dec 26, 2025§ 27-2005 HMC: PROPERLY REPAIR OR REPLACE THE BROKEN OR DEFECTIVE MORTISE LOCK, AND ASSEMBLY ON THE DOOR IN THE ENTRANCE LOCATED AT APT 6F,…
Recent ACRIS activity
Frequently asked questions about 550 EAST 21 STREET
Who owns 550 EAST 21 STREET?
The current registered owner of record for 550 EAST 21 STREET per NYC PLUTO is 550 EAST 21 LLC. The most recent ACRIS deed transfer for this BBL was recorded on March 24, 2022 when the property was conveyed to 550 EAST 21 LLC; MK2021 LLC; MAK 2021 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 550 EAST 21 STREET last sold?
The most recent ACRIS deed transfer for 550 EAST 21 STREET was recorded on March 24, 2022, when KELLNER GARDENS, INC. conveyed the property to 550 EAST 21 LLC; MK2021 LLC; MAK 2021 LLC for $8.80M. The transaction was financed with a $31.35M mortgage from New York Community Bank.
How many HPD violations does 550 EAST 21 STREET have?
No open HPD housing-maintenance code violations are on record for 550 EAST 21 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 550 EAST 21 STREET?
NYC Department of Finance assesses 550 EAST 21 STREET at $1.30M 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 550 EAST 21 STREET and what does that mean?
550 EAST 21 STREET is NYC building class D1 — Elevator, semi-fireproof. A semi-fireproof elevator apartment 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.