724 Knickerbocker Avenue, Brooklyn, NY 11221
BBL 3033910035 (Borough 3, Block 3391, Lot 35) · BIN 3077998 · Last updated:
Summary · as of November 5, 2026
724 Knickerbocker Avenue (Brooklyn, NY 11221; tax lot BBL 3033910035) is a 6-unit walk-up apartment building (building class C2: walk-up apartments, five or six families), built around 1910, on a 2,600 sq ft lot zoned R6. City tax records list the owner as HERANDEZ, CECILIA; the most recent deed with a stated price is dated June 2, 2003 at $313,500 (per ACRIS). The Department of Finance's final market value for tax year 2027 is $1,338,000. As of November 5, 2026, NYC Open Data shows two active DOB violations, eight open HPD violations and four OATH tickets with an unpaid balance. There were no 311 requests in the past 12 months and five HPD complaints since 2019. (Source: NYC Open Data — DOB, HPD, OATH, DOF, DCP and ACRIS datasets — compiled by NYC Property Facts.)
- Owner of record
- HERANDEZ, CECILIA
- Building class
- C2 · Walk-up apartments, five or six families
- Year built · units
- 1910 · 6 res.
- Lot area · zoning
- 2,600 sq ft · R6
- Market value (DOF)
- $1,338,000 FY2027
- Last priced deed
- $313,500 · 2003-06-02
- BBL
- 3033910035
- BIN
- 3077998
- 0Open DOB jobs (permit issued, no sign-off)
- 2Active DOB violations
- 0Active ECB violations
- 8Open HPD violations
- 4OATH tickets with unpaid balance
How to cite: NYC Property Facts, “724 Knickerbocker Avenue, Brooklyn, NY 11221 (BBL 3033910035)”, data as of 2026-11-05, https://nycpropertyfacts.com/ny/brooklyn/724-knickerbocker-avenue-3033910035. Source: NYC Open Data.
Lot & building
Basic facts about the tax lot and building from the city’s PLUTO database.
- Owner (as listed by the city)
- HERANDEZ, CECILIAThe owner name on the city’s tax records. It can lag behind recent sales and is often an LLC.
- Building class
- C2 – Walk-up apartments, five or six familiesThe Department of Finance’s category for what kind of building this is.
- Land use
- Multi-family walk-up buildingsCity Planning’s broad category of how the lot is used.
- Year built
- 1910Often an estimate for older buildings.
- Floors
- 3
- Units
- 6 residential / 6 totalResidential units are apartments; total includes stores and offices.
- Buildings on lot
- 1
- Lot size
- 2,600 sq ft (26 ft × 100 ft)
- Building floor area
- 5,850 sq ft
- Zoning
- R6The zoning district sets what can be built and used here. Residential district.
- Built vs. allowed density (FAR)
- 2.25 built / 2.43 max residentialFloor Area Ratio = building floor area ÷ lot area. If built FAR is below the maximum, zoning may allow more floor area (other rules apply).
- Identifiers
- BBL 3033910035 (Borough 3, Block 3391, Lot 35) · BIN 3077998BBL identifies the tax lot; BIN identifies each building (from DOB/HPD/footprint records).
Agency lookups: DOB BIS · ZoLa (zoning map) · ACRIS
Source: PLUTO (Dept. of City Planning) — city dataset updated 2026-08-24; data as of 2026-11-05; Building Footprints — city dataset updated 2026-10-25; data as of 2026-11-01
Tax assessment
How the Department of Finance values this lot for property tax.
- Market value (tax year 2027, final roll)
- $1,338,000The Department of Finance’s estimate of value for tax purposes. It is not an appraisal and is often far from the sale price.
- Assessed value
- $602,100The portion of market value that taxes are calculated on (capped by law for small homes).
- Taxable value (final)
- $114,524Assessed value minus any exemptions.
- Tax class
- Tax class 2A – residential rental, 4–6 units
| Tax year | Roll | Market value | Assessed value | Tax class |
|---|---|---|---|---|
| 2027 | Final | $1,338,000 | $602,100 | 2A |
| 2026 | Final | $1,193,000 | $536,850 | 2A |
| 2025 | Final | $1,053,000 | $473,850 | 2A |
Source: DOF Property Valuation and Assessment Data — city dataset updated 2026-09-14; data as of 2026-11-05
Sales & deed history 8
Deeds recorded with the City Register (ACRIS). A deed transfers ownership. A $0 or very low price usually means a transfer between related parties, an estate, or a refinance-related transfer, not a market sale. This is not a title search; mortgages, liens and other documents are not shown.
| Date | Type | Price | Seller (grantor) | Buyer (grantee) | Doc ID |
|---|---|---|---|---|---|
| 2003-06-02 | DEEDO | $313,500 | Hernandez, Cecilia | Moses, Priscilla | 2003062602271001 |
| 2003-06-02 | DEEDO | $575,000 | Moses, Priscilla | Mateo, Roberto | 2003062602271002 |
| 1995-10-03 | DEED | $0 / not stated | Hernandez, Heriberto | Herandez, Cecilia | FT_3590004981159 |
| 1984-12-04 | DEED | $0 / not stated | Candelario, Esperanza; Candelario, Juan | Hernandez, Heriberto | FT_3850001058585 |
| 1979-06-14 | DEED | $0 / not stated one deed covering 2251 lots; price is for all of them | Commissioner Of Finance Of The City Of New York; Commissioner Of Financeof The City Of New York; Dept Of Finance Of The City Of Ny; Finance Administration; Commissioner Of Finance Of The City Ofnew York; Commissoner Of Finance Of The City Of New York; Comm Of Finance Of The City Of New York; Finance Admiministration; Comm Of Finance Of The City Of Ny; Finance Admin; Commissioner Of Finance; Commissoiner Of Finance Of The City Of New York; Commissioner Finance Of The City Of Ny; Commissioner Of Finance Of The City New York; Commissioner Of Finance Of The City O Fnew York; Commissioner Of Finance Of The City Of Newyork | City Of N Y; The City Of New York; The City Ofnew York; The City Of Ny; City Of Ny; The City Of New York; City Ny | BK_7930107900050 |
| 1966-06-20 | DEED | $0 / not stated | Ferrone Michael T | Candelario Juan; Candelario Esperanza | BK_6630016500073 |
| 1966-05-11 | DEED | $0 / not stated | Eilone Realty Corp | Ferrone Michael T | BK_6630012800015 |
| 1966-05-11 | DEED | $0 / not stated | Leo John; Leo Joseph | Eilone Realty Corp | BK_6630012800013 |
Source: ACRIS Real Property Master — city dataset updated 2026-10-08; data as of 2026-11-05; ACRIS Real Property Legals — city dataset updated 2026-10-08; data as of 2026-11-05; ACRIS Real Property Parties — city dataset updated 2026-10-08; data as of 2026-11-05
DOB job filings 0 open of 0
A “job” is an application to the Department of Buildings to do construction work. A job marked Permitted, not signed off had a work permit issued but the city has no record of final sign-off (inspection/completion). Old jobs left in this state are common and appear in buyer and lender due diligence; the work may or may not have been done.
No records found in this dataset for this lot.
Source: DOB NOW: Build – Job Application Filings — city dataset updated 2026-11-01; data as of 2026-11-05; DOB Job Application Filings (BIS) — city dataset updated 2026-11-04; data as of 2026-11-05
Work permits 0
Individual permits issued under DOB jobs (one job can have several permits, e.g. plumbing and construction). Permit expiration alone does not mean the job was completed or signed off.
No records found in this dataset for this lot.
Source: DOB NOW: Build – Approved Permits — city dataset updated 2026-11-02; data as of 2026-11-05; DOB Permit Issuance (BIS) — city dataset updated 2026-10-31; data as of 2026-10-31
DOB violations 2 active of 4
Violations issued by the Department of Buildings for building-code or zoning conditions. Active means DOB has not recorded the violation as resolved or dismissed. Many active DOB violations are old (e.g. elevator or boiler inspection paperwork).
| Status | Issued | Type | Description | Number |
|---|---|---|---|---|
| Active V-DOB VIOLATION - ACTIVE | 2023-04-25 | LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED | VIOLATION ISSUED-FAILURE TO FILE 2022 EXTERNAL LOW PRESSURE INSPECTION | V042523LBLVIO11713 |
| Active V-DOB VIOLATION - ACTIVE | 2005-01-31 | LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED | V013105LL629112348 | |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 2001-02-27 | LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED | V*022701LL629119522 | |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 1997-02-10 | LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED | V*021097LL629125300 |
Source: DOB Violations — city dataset updated 2026-11-02; data as of 2026-11-05
ECB violations (DOB) 0 active of 0
DOB violations that go to a hearing at OATH (formerly the Environmental Control Board) and can carry fines. Active or Resolved follows the DOB violation status field. The hearing status is about the hearing and its penalty: written off means the city stopped collecting the fine, not that the condition was corrected. A balance due is a fine the city says is unpaid.
No records found in this dataset for this lot.
Source: DOB ECB Violations — city dataset updated 2026-10-31; data as of 2026-11-05
OATH tickets (all agencies) 4 unpaid of 25
Summonses heard at the Office of Administrative Trials and Hearings, from agencies like Sanitation, Buildings, Fire and Health, linked to this lot’s block and lot. Default means the respondent did not appear at the hearing, which typically results in the maximum penalty. Tickets may be issued to tenants or businesses at the address, not just the owner. DOB ECB tickets appear here too.
| Status | Date | Agency | Charge | Respondent | Imposed / paid / balance | Ticket # |
|---|---|---|---|---|---|---|
| Unpaid balance Default DEFAULTED · DEFAULTED | 2025-07-23 | Pcs - Dohmh | FAIL TO ELIMINATE RODENT INFESTATION SHOWN BY ACTIVE RODENT SIGNS 1ST | HERANDEZ | $600 / $0 / $600 | 0803562239 |
| Unpaid balance Default DEFAULTED · DEFAULTED | 2025-07-23 | Pcs - Dohmh | FAIL TO ELIMINATE CONDITIONS CONDUCIVE TO RODENT-DEBRIS,VEGETATION 1ST | HERANDEZ | $600 / $0 / $600 | 0803562220 |
| Unpaid balance Default DEFAULTED · DEFAULTED | 2021-11-16 | Pcs - Dohmh | FAIL TO ELIMINATE RODENT INFESTATION SHOWN BY ACTIVE RODENT SIGNS 1ST | MATEO ROBERTO | $600 / $0 / $600 | 0802084728 |
| Unpaid balance Default DEFAULTED · DEFAULTED | 2021-11-16 | Pcs - Dohmh | FAIL TO ELIMINATE CONDITIONS CONDUCIVE TO RODENT-DEBRIS,VEGETATION 1ST | MATEO ROBERTO | $600 / $0 / $600 | 0802084719 |
| No balance due PAID IN FULL | 2025-04-03 | Sanitation Others | IMPROPER RECEPTACLE FAILURE TO CONTAINERIZE - RESIDENTIAL 1ST | HERANDEZ CECILIA | $50 / $50 / $0 | 049088413N |
| No balance due PAID IN FULL | 2025-01-18 | Sanitation Others | IMPROPER RECEPTACLE FAILURE TO CONTAINERIZE - RESIDENTIAL 1ST | HERANDEZ CECILIA | $50 / $50 / $0 | 048659385P |
| No balance due PAID IN FULL | 2019-10-24 | Sanitation Others | IMPROPER MISUSED CURBSIDE RECYCLING CONTAINER 1 TO 8 DWELLING UNITS | HERNANDEZ | $25 / $25 / $0 | 0209760697 |
| No balance due PAID IN FULL | 2019-08-15 | Sanitation Others | IMPROPER MISUSED CURBSIDE RECYCLING CONTAINER 1 TO 8 DWELLING UNITS | HERNANDEZ | $25 / $25 / $0 | 0208861620 |
| No balance due PAID IN FULL | 2019-01-24 | Sanitation Others | IMPROPER MISUSED CURBSIDE RECYCLING CONTAINER 1 TO 8 DWELLING UNITS | HERNANDEZ | $25 / $25 / $0 | 0205858382 |
| No balance due PAID IN FULL | 2017-06-21 | Sanitation Others | FAILURE TO CLEAN 18 INCHES INTO STREET | HERNANDEZ | $100 / $100 / $0 | 0195568194 |
| No balance due PAID IN FULL | 2016-11-09 | Sanitation Dept | IMPROPER MISUSED CURBSIDE RECYCLING CONTAINER 1 TO 8 DWELLING UNITS | HERANDEZ | $25 / $25 / — | 041818348R |
| No balance due PAID IN FULL | 2016-11-03 | IMPROPER MISUSED CURBSIDE RECYCLING CONTAINER 1 TO 8 DWELLING UNITS | HERNANDEZ | $25 / $25 / — | 0192855603 |
Showing 12 of 25 records. The API and the source dataset have the full list.
Source: OATH Hearings Division Case Status — city dataset updated 2026-11-02; data as of 2026-11-05
HPD registration & contacts
Owners of most rental buildings must register with the Department of Housing Preservation and Development each year and list an owner and managing agent.
- HPD building ID
- 321409
- Last registered
- 2024-11-20
- Registration valid until
- 2025-09-01 ExpiredRegistrations must be renewed every year.
| Role | Name | Company | Business city |
|---|---|---|---|
| Sitemanager | Roberto Mateo | ||
| Individualowner | Roberto Mateo | Brooklyn, Ny |
Source: HPD Multiple Dwelling Registrations — city dataset updated 2026-11-04; data as of 2026-11-05; HPD Registration Contacts — city dataset updated 2026-11-04; data as of 2026-11-05
HPD housing-code violations 8 open of 14
Violations HPD inspectors issued for conditions in residential buildings (heat, leaks, mold, pests, lead paint, etc.). Class letters show how serious: Class A – non-hazardous (HPD gives 90 days to correct); Class B – hazardous (30 days to correct); Class C – immediately hazardous (24 hours to correct for most conditions); Class I – information / order (e.g. orders to register, lead or other administrative orders). Open means HPD has not recorded the condition as corrected.
| Status | Class | Issued | Apt | Condition |
|---|---|---|---|---|
| Open Nov Sent Out · 2026-05-05 | A | 2026-05-05 | (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 HPDS WEBSITE, WWW.NYC.GOV\HPD, SEARCH BED BUGS. | |
| Open Info Nov Sent Out · 2025-11-19 | I | 2025-11-19 | §27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE §27-2097 AND IS THEREFORE SUBJECT TO CIVIL PENALTIES, PROHIBITED FROM CERTIFYING VIOLATIONS, AND DENIED THE RIGHT TO RECOVER POSSESSION OF PREMISE | |
| Open Nov Sent Out · 2025-06-10 | A | 2025-06-10 | (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 HPDS WEBSITE, WWW.NYC.GOV\HPD, SEARCH BED BUGS. | |
| Open Nov Sent Out · 2024-04-10 | A | 2024-04-10 | (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 HPDS WEBSITE, WWW.NYC.GOV\HPD, SEARCH BED BUGS. | |
| Open Nov Sent Out · 2023-03-23 | A | 2023-03-23 | (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 HPDS WEBSITE, WWW.NYC.GOV\HPD, SEARCH BED BUGS. | |
| Open Nov Sent Out · 2022-02-25 | A | 2022-02-25 | (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 HPDS WEBSITE, WWW.NYC.GOV\HPD, SEARCH BED BUGS. | |
| Open Nov Sent Out · 2021-04-09 | A | 2021-04-09 | (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 HPDS WEBSITE, WWW.NYC.GOV\HPD, SEARCH BED BUGS. | |
| Open Nov Sent Out · 2019-02-04 | B | 2019-02-04 | § 27-2005 ADM CODE PROPERLY REPAIR THE BROKEN OR DEFECTIVE MORTISE LOCK AT VESTIBULE DOOR AT PUBLIC HALL, 1st STORY | |
| Closed Violation Dismissed · 2023-10-18 | I | 2022-11-10 | §27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE §27-2097 AND IS THEREFORE SUBJECT TO CIVIL PENALTIES, PROHIBITED FROM CERTIFYING VIOLATIONS, AND DENIED THE RIGHT TO RECOVER POSSESSION OF PREMISE | |
| Closed Violation Dismissed · 2023-10-18 | I | 2022-02-25 | §27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE §27-2097 AND IS THEREFORE SUBJECT TO CIVIL PENALTIES, PROHIBITED FROM CERTIFYING VIOLATIONS, AND DENIED THE RIGHT TO RECOVER POSSESSION OF PREMISE | |
| Closed Violation Closed · 2022-02-17 | C | 2022-01-21 | § 27-2005 ADM CODE REPLACE WITH NEW THE MISSING TEMPERED PLAIN GLASS LITE AT BUILDING ENTRANCE DOOR | |
| Closed Violation Closed · 2022-02-17 | C | 2022-01-21 | § 27-2005 ADM CODE & 309 M/D LAW ABATE THE NUISANCE CONSISTING OF BROKEN PLEXIGLASS LITE AT BUILDING FRONT DOOR | |
| Closed Violation Dismissed · 2023-10-18 | I | 2021-04-09 | §27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE §27-2097 AND IS THEREFORE SUBJECT TO CIVIL PENALTIES, PROHIBITED FROM CERTIFYING VIOLATIONS, AND DENIED THE RIGHT TO RECOVER POSSESSION OF PREMISE | |
| Closed Violation Dismissed · 2016-12-09 | I | 2016-11-10 | §27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE §27-2097 AND IS THEREFORE SUBJECT TO CIVIL PENALTIES, PROHIBITED FROM CERTIFYING VIOLATIONS, AND DENIED THE RIGHT TO RECOVER POSSESSION OF PREMISE |
Source: HPD Housing Maintenance Code Violations — city dataset updated 2026-11-05; data as of 2026-11-05
HPD complaints 5
Complaints tenants or others made to HPD (usually via 311) about housing conditions, from 2019 onward. A complaint is not a violation; HPD may inspect and issue one.
| Received | Status | Apt | Problem(s) | Outcome |
|---|---|---|---|---|
| 2024-01-18 | CLOSE | BLDG | Heat/Hot Water – Entire Building | 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 co |
| 2022-01-12 | CLOSE | BLDG | Heat/Hot Water – Entire Building | The Department of Housing Preservation and Development was not able to gain access to your apartment or others in the building to inspect for a lack of heat or hot water. The complaint has been closed |
| 2021-01-25 | CLOSE | 1FL | Heat/Hot Water – Entire Building | The Department of Housing Preservation and Development inspected the following conditions. No violations were issued. The complaint has been closed. |
| 2019-12-01 | CLOSE | BLDG | Heat/Hot Water – Entire Building | The Department of Housing Preservation and Development was not able to gain access to your apartment or others in the building to inspect for a lack of heat or hot water. The complaint has been closed |
| 2019-01-31 | CLOSE | 1L | Heat/Hot Water – Entire Building | 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 co |
Source: HPD Housing Maintenance Code Complaints and Problems — city dataset updated 2026-11-05; data as of 2026-11-05
311 requests (last 12 months) 0
Recent 311 service requests the city geocoded to this lot: noise, illegal parking, heat, sanitation and more. Anyone can file them, so they describe activity at or near the address, not necessarily the building itself.
No records found in this dataset for this lot.
Source: 311 Service Requests from 2020 to Present — city dataset updated 2026-11-05; data as of 2026-11-05
Nearby properties
On Knickerbocker Ave
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Same tax block (3391)
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All properties on Knickerbocker Ave, Brooklyn · All of Brooklyn 11221
Open-item counts as of November 5, 2026; each section lists its own dataset date. Machine-readable: JSON API · Markdown · Plain text · API & MCP docs