# 733 Knickerbocker Avenue, Brooklyn, NY 11237

BBL 3033920001 · Block 3392 · Lot 1 · BIN 3400916, 3078027  
Canonical page: https://nycpropertyfacts.com/ny/brooklyn/733-knickerbocker-avenue-3033920001  
Last updated: 2026-11-08 · Open-item counts as of 2026-11-08

## Summary

733 Knickerbocker Avenue (Brooklyn, NY 11237; tax lot BBL 3033920001) is an 8-unit walk-up apartment building (building class C7: walk-up apartments, more than six families, with stores), built around 1905, on a 2,200 sq ft lot zoned R6. City tax records list the owner as G A G LLC. The Department of Finance's final market value for tax year 2027 is $1,534,000. As of November 8, 2026, NYC Open Data shows four DOB jobs with a permit issued but no sign-off and six open HPD violations. There were 11 311 requests in the past 12 months and four 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, “733 Knickerbocker Avenue, Brooklyn, NY 11237 (BBL 3033920001)”, data as of 2026-11-08, https://nycpropertyfacts.com/ny/brooklyn/733-knickerbocker-avenue-3033920001. Source: NYC Open Data.

## Neighborhood

Bushwick (West): https://nycpropertyfacts.com/ny/brooklyn/11237

- Open HPD violations: https://nycpropertyfacts.com/ny/brooklyn/11237/open-hpd-violations
- Active DOB violations: https://nycpropertyfacts.com/ny/brooklyn/11237/active-dob-violations
- Active ECB violations: https://nycpropertyfacts.com/ny/brooklyn/11237/active-ecb-violations
- Open DOB jobs: https://nycpropertyfacts.com/ny/brooklyn/11237/open-dob-jobs
- Unpaid OATH tickets: https://nycpropertyfacts.com/ny/brooklyn/11237/unpaid-oath-tickets

## ZIP

Brooklyn 11237: https://nycpropertyfacts.com/ny/brooklyn/11237

## Nearby properties

Ordered by map distance among lots on this street within 40 house numbers and on this tax block within 15 lot numbers.

- 729 Knickerbocker Avenue (25 ft): https://nycpropertyfacts.com/ny/brooklyn/729-knickerbocker-avenue-3033920003
- 727 Knickerbocker Avenue (51 ft): https://nycpropertyfacts.com/ny/brooklyn/727-knickerbocker-avenue-3033920004
- 735 Knickerbocker Avenue (77 ft): https://nycpropertyfacts.com/ny/brooklyn/735-knickerbocker-avenue-3033990010
- 723 Knickerbocker Avenue (78 ft): https://nycpropertyfacts.com/ny/brooklyn/723-knickerbocker-avenue-3033920005
- 719 Knickerbocker Avenue (102 ft): https://nycpropertyfacts.com/ny/brooklyn/719-knickerbocker-avenue-3033920006
- 739 Knickerbocker Avenue (104 ft): https://nycpropertyfacts.com/ny/brooklyn/739-knickerbocker-avenue-3033990009
- 1376 Jefferson Avenue (154 ft): https://nycpropertyfacts.com/ny/brooklyn/1376-jefferson-avenue-3033920011
- 1378 Jefferson Avenue (163 ft): https://nycpropertyfacts.com/ny/brooklyn/1378-jefferson-avenue-3033920012

## Open items

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

## Lot & building

- Owner of record: G A G LLC
- Building class: C7 – Walk-up apartments, more than six families, with stores
- Year built: 1905
- Floors: 4
- Units: 8 residential / 9 total
- Lot area: 2,200 sq ft · Building area: 6,864 sq ft
- Zoning: R6
- Source: PLUTO (Dept. of City Planning) (https://data.cityofnewyork.us/d/64uk-42ks), city dataset updated 2026-08-24; last loaded 2026-11-08

## Tax assessment

- Tax year 2027 (final roll): market value $1,534,000, assessed value $690,300, 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 |
|---|---|---|---|
| 2001-03-26 | recorded (DEED) | DEED dated 2001-03-26 from 733 KNICKERBOCKER AVE CORP to G A G LLC, no price stated ($0). | bnx9-e6tj |
| 1990-09-06 | recorded (DEED) | DEED dated 1990-09-06 from LIBRANTI, MARIA to 733 KNICKERBOCKER AVE CP, no price stated ($0). | bnx9-e6tj |
| 1984-10-24 | recorded (DEED) | DEED dated 1984-10-24 from DIGERATU, MIRCEA to LIBRANTI, MARIA, no price stated ($0). | bnx9-e6tj |
| 1984-05-31 | recorded (DEED) | DEED dated 1984-05-31 from DIGERATU, MIRCEA; YANG, KUANG YUEH to DIGERATU, MIRCEA, no price stated ($0). | bnx9-e6tj |
| 1983-10-05 | recorded (DEED) | DEED dated 1983-10-05 from LIBRANTI, MARIA to DIGERATU, MIRCEA; YANG, KUANG YUEH, no price stated ($0). | bnx9-e6tj |
| 1969-12-23 | recorded (DEED) | DEED dated 1969-12-23 from RUMORE JOSEPH to LIBRANTI MARIA, 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 |
|---|---|---|---|
| 2012-03-26 | open (PERMIT ISSUED - PARTIAL JOB) | BIS job 320453941 (A2 – Alteration with multiple work types (no change to use/occupancy)): PERMIT ISSUED - PARTIAL JOB — permit issued, no sign-off on record. MODIFYING FIRE SUPPRESSION SYSTEM ONLY, NO CHANGE IN USE EGRESS OR OCCUPANCY. | ic3t-wcy2 |
| 2005-03-17 | open (PERMIT ISSUED - ENTIRE JOB/WORK) | BIS job 301914301 (A2 – Alteration with multiple work types (no change to use/occupancy)): PERMIT ISSUED - ENTIRE JOB/WORK — permit issued, no sign-off on record. Upgrade existing kitchen fire suppression system, as shown on plan. No change in use, occupancy, or egress. | ic3t-wcy2 |
| 1996-02-08 | open (PERMIT ISSUED - ENTIRE JOB/WORK) | BIS job 300500385 (A2 – Alteration with multiple work types (no change to use/occupancy)): PERMIT ISSUED - ENTIRE JOB/WORK — permit issued, no sign-off on record. INSTALL GAS BOILER AND TWO HOT WATER HEATERS.NO CHANGE IN EGRESS USE OR OCCUPANCY IS INVOLVED UNDER THIS APP- LICATION | ic3t-wcy2 |
| 1991-11-13 | open (PERMIT ISSUED - PARTIAL JOB) | BIS job 300136822 (A2 – Alteration with multiple work types (no change to use/occupancy)): PERMIT ISSUED - PARTIAL JOB — permit issued, no sign-off on record. TO INSTALL AND/OR REFURBISH SUPPRESSION SYSTEM ON EXISTING KITCHEN HOOD | ic3t-wcy2 |
| 2012-04-09 | n/a (ISSUED (initial)) | BIS work permit for job 320453941: Equipment work / Fire suppression. Issued 2012-04-09, expires 2013-04-09. | ipu4-2q9a |
| 2005-03-30 | n/a (ISSUED (initial)) | BIS work permit for job 301914301: Equipment work / Fire suppression. Issued 2005-03-30, expires 2005-06-12. | ipu4-2q9a |
| 1996-02-22 | n/a (ISSUED (initial)) | BIS work permit for job 300500385: Equipment work / Boiler. Issued 1996-02-22, expires 1996-06-29. | ipu4-2q9a |
| 1996-02-22 | n/a (ISSUED (initial)) | BIS work permit for job 300500385: Plumbing / Plumbing. Issued 1996-02-22, expires 1996-06-29. | ipu4-2q9a |
| 1991-12-11 | n/a (ISSUED (initial)) | BIS work permit for job 300136822: Equipment work / Fire suppression. Issued 1991-12-11, expires 1992-06-12. | ipu4-2q9a |

## 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 |
|---|---|---|---|
| 2026-10-06 | open (Civ14 Mailed) | HPD class B violation (Class B) in apt 4L: § 27-2017.3 HMC: TRACE AND REPAIR THE SOURCE AND ABATE THE VISIBLE MOLD CONDITION... LESS THAN 10 SQUARE FEET AT EAST WALL IN THE 1st ROOM FROM EAST AT NORTH LOCATED AT APT 4L, 4th STORY, 1st APARTMENT FROM EAST AT SOUTH ORIGINAL VIOLATION 18983498 ISSUED 05-…. Open — not recorded as corrected. | wvxf-dwi5 |
| 2026-10-06 | open (Civ14 Mailed) | HPD class B violation (Class B) in apt 4L: § 27-2017.3 HMC: TRACE AND REPAIR THE SOURCE AND ABATE THE VISIBLE MOLD CONDITION... LESS THAN 10 SQUARE FEET AT SOUTH WALL SOUTH WALL IN THE BATHROOM LOCATED AT APT 4L, 4th STORY, 1st APARTMENT FROM EAST AT SOUTH ORIGINAL VIOLATION 18983490 ISSUED 05-JUN-26 …. Open — not recorded as corrected. | wvxf-dwi5 |
| 2026-10-06 | open (Civ14 Mailed) | HPD class B violation (Class B) in apt 4L: § 27-2017.3 HMC: TRACE AND REPAIR THE SOURCE AND ABATE THE VISIBLE MOLD CONDITION... LESS THAN 10 SQUARE FEET WEST WALL IN THE BATHROOM LOCATED AT APT 4L, 4th STORY, 1st APARTMENT FROM EAST AT SOUTH ORIGINAL VIOLATION 18983491 ISSUED 05-JUN-26 HAS BEEN UPGRAD…. Open — not recorded as corrected. | wvxf-dwi5 |
| 2026-06-08 | open (Violation Will Be Reinspected) | HPD class B violation (Class B) in apt 4L: § 27-2017.3 HMC: TRACE AND REPAIR THE SOURCE AND ABATE THE VISIBLE MOLD CONDITION... GREATER THAN 10 SQUARE FEET AT CEILING CEILING IN THE BATHROOM LOCATED AT APT 4L, 4th STORY, 1st APARTMENT FROM EAST AT SOUTH. Open — not recorded as corrected. | wvxf-dwi5 |
| 2026-06-08 | open (Invalid Certification) | HPD class C violation (Class C) in apt 4L: HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF ROACHES IN THE ENTIRE APARTMENT LOCATED AT APT 4L, 4th STORY, 1st APARTMENT FROM EAST AT SOUTH. Open — not recorded as corrected. | wvxf-dwi5 |
| 2026-06-08 | open (Invalid Certification) | HPD class C violation (Class C) in apt 4L: HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF ROACHES IN THE ENTIRE APARTMENT LOCATED AT APT 4L, 4th STORY, 1st APARTMENT FROM EAST AT SOUTH. 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.

No records found.

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

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

| Date | Status | Description | Source |
|---|---|---|---|
| 2026-08-24 | closed (CLOSE) | HPD complaint (apt BLDG): Heat/Hot Water – Entire Building. HPD conducted an inspection of this complaint. The conditions observed by the inspector did not violate the housing laws enforced by HPD. The complaint has been closed. | ygpa-z7cr |
| 2026-08-12 | closed (CLOSE) | HPD complaint (apt BLDG): Heat/Hot Water – Entire Building. More than one complaint was received for this building-wide condition. This complaint status is for the initial complaint.The Department of Housing Preservation and Development contacted a tenant in … | ygpa-z7cr |
| 2026-08-11 | closed (CLOSE) | HPD complaint (apt BLDG): Heat/Hot Water – Entire Building. HPD responded to a complaint of no heat or hot water in the building. An occupant of the building confirmed heat and hot water had been restored when the Inspector attempted to conduct the inspection… | ygpa-z7cr |
| 2026-05-26 | closed (CLOSE) | HPD complaint (apt 4L): Flooring/Stairs – Floor; Plumbing – Basin/Sink; Paint/Plaster – Ceiling; Door/Window – Window Frame. HPD inspected this condition so the complaint has been closed. Violations were issued. The law provides the property owner time to correct the condition(s). Violation descriptions and the dates for t… | ygpa-z7cr |
| 2026-10-29 | closed (Closed) | 311 request to NYPD: Noise - Street/Sidewalk – Loud Music/Party. | erm2-nwe9 |
| 2026-10-25 | open (Open) | 311 request to DSNY: Graffiti – Graffiti. | erm2-nwe9 |
| 2026-08-24 | closed (Closed) | 311 request to HPD: HEAT/HOT WATER – ENTIRE BUILDING. | erm2-nwe9 |
| 2026-08-12 | closed (Closed) | 311 request to HPD: HEAT/HOT WATER – ENTIRE BUILDING. | erm2-nwe9 |
| 2026-08-11 | open (Open) | 311 request to HPD: HEAT/HOT WATER – ENTIRE BUILDING. | erm2-nwe9 |
| 2026-05-26 | closed (Closed) | 311 request to HPD: FLOORING/STAIRS – FLOOR. | erm2-nwe9 |
| 2026-05-26 | closed (Closed) | 311 request to HPD: PLUMBING – BASIN/SINK. | erm2-nwe9 |
| 2026-05-26 | closed (Closed) | 311 request to HPD: PAINT/PLASTER – CEILING. | erm2-nwe9 |
| 2026-05-26 | closed (Closed) | 311 request to HPD: DOOR/WINDOW – WINDOW FRAME. | erm2-nwe9 |
| 2026-05-26 | closed (Closed) | 311 request to DOHMH: Indoor Air Quality – Chemical Vapors/Gases/Odors. | erm2-nwe9 |
| 2026-02-15 | closed (Closed) | 311 request to NYPD: Noise - Residential – Loud Music/Party. | 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 G A G LLC. | 64uk-42ks |
| 2001-03-26 | recorded | Grantee (buyer) on the most recent deed (DEED, 2001-03-26). | 636b-3b5g |
| 2026-08-13 | current_registration | HPD registration contact: Agent Yochanan Altberg (G A G LLC), business city Jamaica. | feu5-w2e2 |
| 2026-08-13 | current_registration | HPD registration contact: CorporateOwner (G A G LLC), business city New York. | feu5-w2e2 |
| 2026-08-13 | current_registration | HPD registration contact: Shareholder Guy Altberg, business city Jamaica. | feu5-w2e2 |
| 2026-08-13 | current_registration | HPD registration contact: SiteManager Guy Altberg. | feu5-w2e2 |
| 2026-08-13 | current_registration | HPD registration contact: Officer Guy Altberg, business city New York. | feu5-w2e2 |
| 2026-08-13 | current_registration | HPD registration contact: Shareholder Yochanan Altberg, business city New York. | feu5-w2e2 |
| 2026-08-13 | current_registration | HPD registration contact: HeadOfficer Yochanan Altberg, business city New York. | 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/3033920001