# 804 Knickerbocker Avenue, Brooklyn, NY 11207

BBL 3034120040 · Block 3412 · Lot 40 · BIN 3078891  
Canonical page: https://nycpropertyfacts.com/ny/brooklyn/804-knickerbocker-avenue-3034120040  
Last updated: 2026-10-31 · Open-item counts as of 2026-11-05

## Summary

804 Knickerbocker Avenue (Brooklyn, NY 11207; tax lot BBL 3034120040) is a 4-unit mixed-use building with apartments and ground-floor commercial space (building class S4: mixed-use: four-family home with one store or office), built around 1910, on a 2,200 sq ft lot zoned R6. City tax records list the owner as KAPPEL, HERMANN. The Department of Finance's final market value for tax year 2027 is $1,089,000. As of November 5, 2026, NYC Open Data shows one DOB job with a permit issued but no sign-off and three open HPD violations. There were 18 311 requests in the past 12 months and three 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, “804 Knickerbocker Avenue, Brooklyn, NY 11207 (BBL 3034120040)”, data as of 2026-11-05, https://nycpropertyfacts.com/ny/brooklyn/804-knickerbocker-avenue-3034120040. Source: NYC Open Data.

## Open items

| Item | Count |
|---|---|
| Open DOB jobs (permit issued, not signed off) | 1 |
| Active DOB violations | 0 |
| Active ECB violations | 0 |
| Open HPD violations | 3 |
| OATH tickets with unpaid balance | 0 |

## Lot & building

- Owner of record: KAPPEL, HERMANN
- Building class: S4 – Mixed-use: four-family home with one store or office
- Year built: 1910
- Floors: 3
- Units: 4 residential / 5 total
- Lot area: 2,200 sq ft · Building area: 5,346 sq ft
- Zoning: R6
- Source: PLUTO (Dept. of City Planning) (https://data.cityofnewyork.us/d/64uk-42ks), data as of 2026-11-05

## Tax assessment

- Tax year 2027 (final roll): market value $1,089,000, assessed value $490,050, tax class 2A
- 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 |
|---|---|---|---|
| 2012-04-11 | recorded (DEED) | DEED dated 2012-04-11 from KAPPEL, HERMANN to KAPPEL, HERMANN; KAPPEL, ANA R, no price stated ($0). | bnx9-e6tj |
| 1975-02-07 | recorded (DEED) | DEED dated 1975-02-07 from MAZZA JOHN to KAPPEL HERMAN, no price stated ($0). | bnx9-e6tj |
| 1970-08-25 | recorded (DEED) | DEED dated 1970-08-25 from MASPETH FEDERAL SAVS & LOAN ASSN to MAZZA JOHN, no price stated ($0). | bnx9-e6tj |
| 1970-04-29 | recorded (DEED) | DEED dated 1970-04-29 from POLITO PHILIP (DEFENDANTS); VENNER JULIUS (REFEREE) to MASPETH FEDERAL SAVS LOAN ASSOCIATION, no price stated ($0). | bnx9-e6tj |
| 1968-05-10 | recorded (DEED) | DEED dated 1968-05-10 from POLITO CARMELO; POLITO CHARLES to POLITO PHILIP; BULLA CONCETTA, 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 |
|---|---|---|---|
| 2019-02-20 | open (PERMIT ISSUED - ENTIRE JOB/WORK) | BIS job 321908977 (A2 – Alteration with multiple work types (no change to use/occupancy)): PERMIT ISSUED - ENTIRE JOB/WORK — permit issued, no sign-off on record. INSTALL THE KITCHEN FIRE SUPPRESSION SYSTEM AND KITCHEN EXHAUST SYSTEM FOR COMMERCIAL SPACE .COOKING EQUIPMENT IS ELECTRIC . NO CHANGE IN USE , ERGRESS OR OCCUPANCY . | ic3t-wcy2 |
| 2019-03-13 | n/a (ISSUED (initial)) | BIS work permit for job 321908977: Equipment work / Fire suppression. Issued 2019-03-13, expires 2019-05-12. | ipu4-2q9a |
| 2019-03-06 | n/a (ISSUED (initial)) | BIS work permit for job 321908977: Equipment work / Mechanical/HVAC. Issued 2019-03-06, expires 2019-05-12. | 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 |
|---|---|---|---|
| 2023-07-31 | 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 |
| 2023-02-10 | open (Nov Certified Late) | HPD class B violation (Class B): § 27-2005, 2007 ADM CODE AND DEPT. RULES AND REGULATIONS. REMOVE THE ENCUMBRANCE OBSTRUCTING EGRESS FROM FIRE ESCAPES CONSISITING OF HOUSEHOLD ITEMS ON 2ND STORY BALCONY AT WEST STACK BUILDING FRONT AT FIRE ESCAPE. Open — not recorded as corrected. | wvxf-dwi5 |
| 2009-10-01 | open (Nov Certified Late) | HPD class C violation (Class C) in apt 3R: SECTION 27-2018 ADM CODE ABATE THE NUISANCE CONSISTING OF RODENTS ,RATS, IN THE ENTIRE APARTMENT LOCATED AT APT 3R, 3rd 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 |
|---|---|---|---|
| 2023-10-18 | pending (NEW ISSUANCE) | OATH ticket from Pcs - Dohmh: FAIL TO ELIMINATE CONDITIONS CONDUCIVE TO RODENT-DEBRIS,VEGETATION 1ST. Hearing pending. | jz4z-kudi |
| 2023-10-18 | pending (NEW ISSUANCE) | OATH ticket from Pcs - Dohmh: FAIL TO ELIMINATE RODENT INFESTATION SHOWN BY ACTIVE RODENT SIGNS 1ST. Hearing pending. | 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 |
|---|---|---|---|
| 2023-02-03 | closed (CLOSE) | HPD complaint (apt 2L): Heat/Hot Water – Apartment Only. The Department of Housing Preservation and Development responded to a complaint of no heat or hot water and was advised by a tenant in the building that heat and hot water had been restored. If the c… | ygpa-z7cr |
| 2022-11-30 | closed (CLOSE) | HPD complaint (apt BLDG): Door/Window – Door. The Department of Housing Preservation and Development inspected the following conditions. Violations were issued. Information about specific violations is available at www.nyc.gov/hpd | ygpa-z7cr |
| 2022-02-24 | closed (CLOSE) | HPD complaint (apt 2L): Heat/Hot Water – Apartment Only. The Department of Housing Preservation and Development contacted an occupant of the apartment and verified that the following conditions were corrected. The complaint has been closed. If the conditio… | ygpa-z7cr |
| 2026-08-14 | closed (Closed) | 311 request to DEP: Water Maintenance – Fire Hydrant Running. | erm2-nwe9 |
| 2026-08-12 | closed (Closed) | 311 request to DEP: Water Maintenance – Fire Hydrant Running. | erm2-nwe9 |
| 2026-08-09 | closed (Closed) | 311 request to NYPD: Noise - Street/Sidewalk – Loud Music/Party. | erm2-nwe9 |
| 2026-08-06 | closed (Closed) | 311 request to DSNY: Dirty Condition – Trash. | erm2-nwe9 |
| 2026-07-25 | closed (Closed) | 311 request to NYPD: Noise - Street/Sidewalk – Loud Music/Party. | erm2-nwe9 |
| 2026-07-25 | closed (Closed) | 311 request to NYPD: Noise - Street/Sidewalk – Loud Music/Party. | erm2-nwe9 |
| 2026-07-25 | closed (Closed) | 311 request to NYPD: Noise - Street/Sidewalk – Loud Music/Party. | erm2-nwe9 |
| 2026-07-25 | closed (Closed) | 311 request to NYPD: Noise - Street/Sidewalk – Loud Music/Party. | erm2-nwe9 |
| 2026-07-25 | closed (Closed) | 311 request to NYPD: Noise - Street/Sidewalk – Loud Music/Party. | erm2-nwe9 |
| 2026-07-25 | closed (Closed) | 311 request to NYPD: Noise - Street/Sidewalk – Loud Music/Party. | erm2-nwe9 |
| 2026-07-25 | closed (Closed) | 311 request to NYPD: Noise - Residential – Loud Music/Party. | erm2-nwe9 |
| 2026-07-25 | closed (Closed) | 311 request to NYPD: Noise - Street/Sidewalk – Loud Music/Party. | erm2-nwe9 |

Showing 15 of 21. Full list: https://nycpropertyfacts.com/api/v1/property/3034120040/complaints

## 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 KAPPEL, HERMANN. | 64uk-42ks |
| 2012-04-11 | recorded | Grantee (buyer) on the most recent deed (DEED, 2012-04-11). | 636b-3b5g |
| 2012-04-11 | recorded | Grantee (buyer) on the most recent deed (DEED, 2012-04-11). | 636b-3b5g |
| 2025-08-28 | expired_registration | HPD registration contact: SiteManager Hermann Kappel. | feu5-w2e2 |
| 2025-08-28 | expired_registration | HPD registration contact: JointOwner No Secondowner, business city Woodside. | feu5-w2e2 |
| 2025-08-28 | expired_registration | HPD registration contact: Agent Magdalene Jacobson (804 KNICKERBOCKER LLC), business city Woodside. | feu5-w2e2 |
| 2025-08-28 | expired_registration | HPD registration contact: JointOwner Ana Kappel, business city Woodside. | 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/3034120040