# 585 Knickerbocker Avenue, Brooklyn, NY 11221

BBL 3033440002 · Block 3344 · Lot 2 · BIN 3326408, 3326407  
Canonical page: https://nycpropertyfacts.com/ny/brooklyn/585-knickerbocker-avenue-3033440002  
Last updated: 2026-11-03 · Open-item counts as of 2026-10-31

Also recorded as: 583 Knickerbocker Ave; 585054 Knickerbocker Ave

## Summary

585 Knickerbocker Avenue (Brooklyn, NY 11221; tax lot BBL 3033440002) is a 10-unit walk-up apartment building (building class C1: walk-up apartments, more than six families, no stores), built around 1920, on a 2,500 sq ft lot zoned R6. City tax records list the owner as 583-589 KNICKERBOCKER AVE PARTNERS LLC; the most recent deed with a stated price is dated December 1, 2022 at $3,350,000 in a deed covering 2 lots (per ACRIS). The Department of Finance's final market value for tax year 2027 is $2,159,000. As of October 31, 2026, NYC Open Data shows six active DOB violations, seven open HPD violations and four OATH tickets with an unpaid balance. There were five 311 requests in the past 12 months and two HPD complaints since 2019. (Source: NYC Open Data — DOB, HPD, OATH, DOF, DCP and ACRIS datasets — compiled by NYC Property Facts.)

How to cite: NYC Property Facts, “585 Knickerbocker Avenue, Brooklyn, NY 11221 (BBL 3033440002)”, data as of 2026-10-31, https://nycpropertyfacts.com/ny/brooklyn/585-knickerbocker-avenue-3033440002. Source: NYC Open Data.

## Open items

| Item | Count |
|---|---|
| Open DOB jobs (permit issued, not signed off) | 0 |
| Active DOB violations | 6 |
| Active ECB violations | 0 |
| Open HPD violations | 7 |
| OATH tickets with unpaid balance | 4 |

## Lot & building

- Owner of record: 583-589 KNICKERBOCKER AVE PARTNERS LLC
- Building class: C1 – Walk-up apartments, more than six families, no stores
- Year built: 1920
- Floors: 4
- Units: 10 residential / 10 total
- Lot area: 2,500 sq ft · Building area: 8,073 sq ft
- Zoning: R6
- Source: PLUTO (Dept. of City Planning) (https://data.cityofnewyork.us/d/64uk-42ks), data as of 2026-11-04

## Tax assessment

- Tax year 2027 (final roll): market value $2,159,000, assessed value $971,550, tax class 2B
- Source: DOF Property Valuation and Assessment Data (https://data.cityofnewyork.us/d/8y4t-faws)

## Sales & deeds (ACRIS)

Deeds recorded with the City Register. amount 0 usually means a non-market transfer. lots_in_deed > 1 means the price covers several lots.

| Date | Status | Description | Source |
|---|---|---|---|
| 2024-11-25 | recorded (DEED) | DEED dated 2024-11-25 from 583 KNICKERBOCKER LLC; 583 KNICKERBOCKER HOLDINGS LLC to 583-589 KNICKERBOCKER AVE PARTNERS LLC, no price stated ($0) for a deed covering 3 lots. | bnx9-e6tj |
| 2022-12-01 | recorded (DEED) | DEED dated 2022-12-01 from M.F.R.D REALTY CORP to 583 KNICKERBOCKER LLC; 583 KNICKERBOCKER HOLDINGS LLC, stated price $3,350,000 for a deed covering 2 lots. | bnx9-e6tj |
| 1972-10-27 | recorded (DEED) | DEED dated 1972-10-27 from FRITZ SUSIE to MFRD RLTY CORP, no price stated ($0). | bnx9-e6tj |

## Open DOB jobs and recent work permits

A DOB "job" is an application to do construction work. status "open" = a permit was issued but DOB has no record of final sign-off. Work permits are listed with type "work_permit" and their DOB permit status (they are not counted as open items).

| Date | Status | Description | Source |
|---|---|---|---|
| 2024-12-03 | n/a (Signed-off) | DOB NOW work permit for job B08012111-S5: Plumbing — PLUMBING SPECIFICATIONS FILED IN CONJUNCTION WITH GC APPLICATION #B08012111-I1. Issued 2024-12-03, expires 2025-03-19. | rbx6-tga4 |
| 2024-10-16 | n/a (Signed-off) | DOB NOW work permit for job B08012111-S2: Foundation — STRUCTRAL WORK SPECIFICATIONS FILED IN CONJUNCTION WITH GC APPLICATION #B08012111-I1. Issued 2024-10-16, expires 2025-03-19. | rbx6-tga4 |
| 2024-10-16 | n/a (Signed-off) | DOB NOW work permit for job B08012111-S2: Structural — STRUCTRAL WORK SPECIFICATIONS FILED IN CONJUNCTION WITH GC APPLICATION #B08012111-I1. Issued 2024-10-16, expires 2025-03-19. | rbx6-tga4 |
| 2024-10-16 | n/a (Signed-off) | DOB NOW work permit for job B08012111-S2: Earth Work — STRUCTRAL WORK SPECIFICATIONS FILED IN CONJUNCTION WITH GC APPLICATION #B08012111-I1. Issued 2024-10-16, expires 2025-03-19. | rbx6-tga4 |
| 2024-10-16 | n/a (Signed-off) | DOB NOW work permit for job B08012111-S2: General Construction — STRUCTRAL WORK SPECIFICATIONS FILED IN CONJUNCTION WITH GC APPLICATION #B08012111-I1. Issued 2024-10-16, expires 2025-03-19. | rbx6-tga4 |
| 2024-06-18 | n/a (Signed-off) | DOB NOW work permit for job B08012111-S6: Mechanical Systems — MECHANICAL SPECIFICATIONS FILED IN CONJUNCTION WITH GC APPLICATION #B08012111-I1. Issued 2024-06-18, expires 2024-12-06. | rbx6-tga4 |
| 2024-03-13 | n/a (Signed-off) | DOB NOW work permit for job B08012111-S1: Construction Fence — INSTALLATION OF A TEMPORARY WOODEN CONSTRUCTION FENCE. Issued 2024-03-13, expires 2024-12-06. | rbx6-tga4 |
| 2023-11-09 | n/a (Permit Issued) | DOB NOW work permit for job B08012111-I1: General Construction — PROPOSED VERTICAL ENLARGEMENT, INTERIOR RENOVATION & CONVERTING COMMERCIAL BUILDING INTO A RESIDENTIAL BUILDING TO 10 RESIDENTIAL UNITS. Issued 2023-11-09, expires 2024-11-09. | rbx6-tga4 |
| 2023-08-21 | n/a (Signed-off) | DOB NOW work permit for job B08012111-S4: Sprinklers — SPRINKLER SPECIFICATIONS FILED IN CONJUNCTION WITH GC APPLICATION #B08012111-I1. Issued 2023-08-21, expires 2024-08-21. | rbx6-tga4 |
| 2023-08-21 | n/a (Signed-off) | DOB NOW work permit for job B08012111-S5: Plumbing — PLUMBING SPECIFICATIONS FILED IN CONJUNCTION WITH GC APPLICATION #B08012111-I1. Issued 2023-08-21, expires 2024-08-21. | rbx6-tga4 |
| 2023-05-24 | n/a (Signed-off) | DOB NOW work permit for job B00878952-I1: Supported Scaffold — INSTALLATION OF 300PSF SIDEWALK SHED, ROOF PROTECTION AND PIPE SCAFFOLDING AS PER PLANS, ALL EQUIPMENT SHALL COMPLY WITH CHAPTER # 33 OF THE NYC CODE 2022, NO …. Issued 2023-05-24, expires 2024-03-07. | rbx6-tga4 |
| 2023-05-24 | n/a (Signed-off) | DOB NOW work permit for job B00878952-I1: Sidewalk Shed — INSTALLATION OF 300PSF SIDEWALK SHED, ROOF PROTECTION AND PIPE SCAFFOLDING AS PER PLANS, ALL EQUIPMENT SHALL COMPLY WITH CHAPTER # 33 OF THE NYC CODE 2022, NO …. Issued 2023-05-24, expires 2024-03-07. | rbx6-tga4 |
| 2023-05-24 | n/a (Signed-off) | DOB NOW work permit for job B00878952-I1: Supported Scaffold — INSTALLATION OF 300PSF SIDEWALK SHED, ROOF PROTECTION AND PIPE SCAFFOLDING AS PER PLANS, ALL EQUIPMENT SHALL COMPLY WITH CHAPTER # 33 OF THE NYC CODE 2022, NO …. Issued 2023-05-24, expires 2024-03-07. | rbx6-tga4 |
| 2023-05-24 | n/a (Signed-off) | DOB NOW work permit for job B00878952-I1: Sidewalk Shed — INSTALLATION OF 300PSF SIDEWALK SHED, ROOF PROTECTION AND PIPE SCAFFOLDING AS PER PLANS, ALL EQUIPMENT SHALL COMPLY WITH CHAPTER # 33 OF THE NYC CODE 2022, NO …. Issued 2023-05-24, expires 2024-03-07. | rbx6-tga4 |
| 2023-02-27 | n/a (Signed-off) | DOB NOW work permit for job B08012111-S1: Construction Fence — INSTALLATION OF A TEMPORARY WOODEN CONSTRUCTION FENCE. Issued 2023-02-27, expires 2024-02-27. | rbx6-tga4 |
| 2023-02-24 | n/a (Permit Issued) | DOB NOW work permit for job B08012111-I1: General Construction — PROPOSED VERTICAL ENLARGEMENT, INTERIOR RENOVATION & CONVERTING COMMERCIAL BUILDING INTO A RESIDENTIAL BUILDING TO 10 RESIDENTIAL UNITS. Issued 2023-02-24, expires 2023-11-10. | rbx6-tga4 |
| 2023-02-08 | n/a (Signed-off) | DOB NOW work permit for job B08017073-S1: Plumbing — PLUMBING SPECIFICATIONS FILED IN CONJUNCTION WITH GC APPLICATION #B08017073-I1. Issued 2023-02-08, expires 2023-07-01. | rbx6-tga4 |
| 2023-01-27 | n/a (Signed-off) | DOB NOW work permit for job B08017073-I1: General Construction — INTERIOR RENOVATION TO AN EXISTING 2 STORY & CELLAR MIXED USE BUILDING. Issued 2023-01-27, expires 2023-11-29. | rbx6-tga4 |
| 2023-01-27 | n/a (Signed-off) | DOB NOW work permit for job B08017073-I1: Mechanical Systems — INTERIOR RENOVATION TO AN EXISTING 2 STORY & CELLAR MIXED USE BUILDING. Issued 2023-01-27, expires 2023-11-29. | rbx6-tga4 |
| 2022-12-22 | n/a (Signed-off) | DOB NOW work permit for job B08017073-I1: General Construction — INTERIOR RENOVATION TO AN EXISTING 2 STORY & CELLAR MIXED USE BUILDING. Issued 2022-12-22, expires 2023-02-17. | rbx6-tga4 |

Showing 20 of 23. Full list: https://nycpropertyfacts.com/api/v1/property/3033440002/permits

## Open violations (DOB, ECB, HPD)

status "open" = DOB violation category is ACTIVE, ECB violation status is ACTIVE, or HPD violation status is Open.

| Date | Status | Description | Source |
|---|---|---|---|
| 2020-01-17 | open (V-DOB VIOLATION - ACTIVE) | DOB violation (LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED): VIOLATION ISSUED FOR FAILURE TO FILE ANNUAL BOILER 2017 INSPECTION REPORT. Active — not recorded as resolved or dismissed. | 3h2n-5cm9 |
| 2014-05-15 | open (V-DOB VIOLATION - ACTIVE) | DOB violation (LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED): VIOLATION ISSUED FOR FAILURE TO FILE ANNUAL BOILER 2012 INSPECTION REPORT. Active — not recorded as resolved or dismissed. | 3h2n-5cm9 |
| 2006-01-06 | open (V-DOB VIOLATION - ACTIVE) | DOB violation (LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED). Active — not recorded as resolved or dismissed. | 3h2n-5cm9 |
| 1997-02-10 | open (V-DOB VIOLATION - ACTIVE) | DOB violation (LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED). Active — not recorded as resolved or dismissed. | 3h2n-5cm9 |
| 1995-08-29 | open (V-DOB VIOLATION - ACTIVE) | DOB violation (LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED). Active — not recorded as resolved or dismissed. | 3h2n-5cm9 |
| 1993-08-16 | open (V-DOB VIOLATION - ACTIVE) | DOB violation (LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED). Active — not recorded as resolved or dismissed. | 3h2n-5cm9 |
| 2026-05-19 | open (Nov Sent Out) | HPD class C violation (Class C): § 27-2033 ADM CODE POST NOTICE, IN FORM APPROVED BY THE DEPARTMENT, STATING THE NAME AND LOCATION OF THE PERSON DESIGNATED BY THE OWNER TO HAVE KEY TO BUILDINGS HEATING SYSTEM MISSING AT PUBLIC HALL, 1st STORY. Open — not recorded as corrected. | wvxf-dwi5 |
| 2026-05-19 | open (Nov Sent Out) | HPD class A violation (Class A): § 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 THAT SHOULD BE FOLLOWED WHEN A GAS LEAK IS SUSPECTED AT PUBLIC HALL, 1st STORY. Open — not recorded as corrected. | wvxf-dwi5 |
| 2026-05-19 | open (Nov Sent Out) | HPD class A violation (Class A): § 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 AGENCYS HOUSING INFORMATION GUIDE. A SAMPLE NOTICE CAN BE FOUND AT WWW.NYC.GOV/HPD. AT PUBLIC HALL, 1st STORY. Open — not recorded as corrected. | wvxf-dwi5 |
| 2026-05-19 | open (Nov Sent Out) | HPD class A violation (Class A): § 329, M/D LAW AND DEPT. RULES AND REGS. PROVIDE A COMPLETED CERTIFICATE OF INSPECTION VISITS IN A PROPER FRAME AT OR NEAR MAILBOXES, BOTTOM EDGE OF FRAME BETWEEN 48-62 INCHES ABOVE FLOOR MISSING AT PUBLIC HALL, 1st STORY. Open — not recorded as corrected. | wvxf-dwi5 |
| 2026-05-19 | open (Nov Sent Out) | HPD class A violation (Class A): §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 COMMISSIONER, IN A COMMON AREA OF A CLASS A MULTIPLE DWELLING NEAR INSPECTION CERTIFICATE OR PROVIDE NOTICE TO TENANTS IN PRIV…. Open — not recorded as corrected. | wvxf-dwi5 |
| 2026-05-19 | open (Nov Sent Out) | HPD class A violation (Class A): § 27-2104 ADM CODE POST AND MAINTAIN A PROPER SIGN ON WALL OF ENTRANCE STORY SHOWING THE REGISTRATION NUMBER ASSIGNED BY THE DEPARTMENT AND THE ADDRESS OF THE BUILDING. AT PUBLIC HALL, 1st STORY. Open — not recorded as corrected. | wvxf-dwi5 |
| 2026-05-19 | open (Nov Sent Out) | HPD class A violation (Class A): §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 MAILBOX MISSING AT PUBLIC HALL, 1st STORY. Open — not recorded as corrected. | wvxf-dwi5 |

## OATH tickets with unpaid balance or pending

status "open" = balance due > $0 after a decision (cases awaiting a hearing are "pending"). default=true means the respondent did not appear.

| Date | Status | Description | Source |
|---|---|---|---|
| 2025-07-07 | open (DOCKETED · IN VIOLATION) | OATH ticket from Sanitation Others: SPILLAGE FROM A RECEPTACLE 1ST OFFENSE. Unpaid balance $100. | jz4z-kudi |
| 2023-06-28 | open (DOCKETED · DEFAULTED) | OATH ticket from Sanitation Others: LOOSE RUBBISH 1ST OCCURRENCE. Unpaid balance $300. Respondent defaulted (did not appear). | jz4z-kudi |
| 2022-09-09 | open (DEFAULTED · DEFAULTED) | OATH ticket from Pcs - Dohmh: FAIL TO ELIMINATE RODENT INFESTATION SHOWN BY ACTIVE RODENT SIGNS 1ST. Unpaid balance $600. Respondent defaulted (did not appear). | jz4z-kudi |
| 2019-07-08 | open (DEFAULTED · DEFAULTED) | OATH ticket from Dep - Bwso: FAILED TO SUBMIT AN ANNUAL TEST REPORT FOR A BACKFLOW PREVENTER. Unpaid balance $1,000. Respondent defaulted (did not appear). | jz4z-kudi |

## Complaints (HPD since 2019, 311 last 12 months)

Complaints are reports, not violations. status mirrors the published complaint / request status.

| Date | Status | Description | Source |
|---|---|---|---|
| 2026-05-12 | closed (CLOSE) | HPD complaint (apt BLDG): Plumbing – Water Supply. HPD attempted to conduct an inspection in response to this complaint, but was unable to complete the inspection. Please submit a new service request with 311 if the condition still exists. For more i… | ygpa-z7cr |
| 2025-08-20 | closed (CLOSE) | HPD complaint (apt 2B): Water Leak – Slow Leak; Unsanitary Condition – Mold. HPD attempted to conduct an inspection in response to this complaint, but was unable to complete the inspection. Please submit a new service request with 311 if the condition still exists. For more i… | ygpa-z7cr |
| 2026-05-12 | closed (Closed) | 311 request to HPD: PLUMBING – WATER SUPPLY. | erm2-nwe9 |
| 2026-05-10 | closed (Closed) | 311 request to NYPD: Noise - Residential – Loud Music/Party. | erm2-nwe9 |
| 2026-05-10 | closed (Closed) | 311 request to NYPD: Noise - Residential – Loud Music/Party. | erm2-nwe9 |
| 2026-05-10 | closed (Closed) | 311 request to NYPD: Noise - Residential – Loud Music/Party. | erm2-nwe9 |
| 2025-11-15 | closed (Closed) | 311 request to DOHMH: Indoor Sewage – Sewage Leak. | erm2-nwe9 |

## Owners & contacts

Owner of record comes from city tax records (PLUTO) and can lag behind recent sales.

| Date | Status | Description | Source |
|---|---|---|---|
| 2026-08-24 | current | City tax records (PLUTO) list the owner as 583-589 KNICKERBOCKER AVE PARTNERS LLC. | 64uk-42ks |
| 2024-11-25 | recorded | Grantee (buyer) on the most recent deed (DEED, 2024-11-25). | 636b-3b5g |
| 2026-07-23 | current_registration | HPD registration contact: Agent Tom Rosenberg, business city Brooklyn. | feu5-w2e2 |
| 2026-07-23 | current_registration | HPD registration contact: HeadOfficer Tom Rosenberg, business city Brooklyn. | feu5-w2e2 |
| 2026-07-23 | current_registration | HPD registration contact: CorporateOwner (583-589 Knickerbocker Ave Partners LLC), business city Brooklyn. | feu5-w2e2 |

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Independent site. Data from NYC Open Data; not affiliated with the City of New York. Not a title search or official record; verify with the issuing agency. JSON: https://nycpropertyfacts.com/api/v1/property/3033440002