Independent site. Data from NYC Open Data; not affiliated with the City of New York.

NYC Property Factsfree public-records reference

3051 Avenue U, Madison, Brooklyn, NY 11229

BBL 3073400047 (Borough 3, Block 7340, Lot 47) · BIN 3199285 · Last updated: · Madison · ZIP 11229

Summary · as of November 10, 2026

3051 Avenue U (Brooklyn, NY 11229; tax lot BBL 3073400047) is a 2-unit mixed-use building with apartments and ground-floor commercial space (building class S2: mixed-use: two-family home with one store or office), built around 1925, on a 1,900 sq ft lot zoned R4. City tax records list the owner as LEONG, WILLIAM. The Department of Finance's final market value for tax year 2027 is $813,000. As of November 10, 2026 (limited by DOB Job Application Filings (BIS); other open-item sources were confirmed later), NYC Open Data shows no open DOB jobs, active DOB or DOB NOW safety violations, active ECB violations, open HPD violations or unpaid OATH tickets for this lot. (Source: NYC Open Data — DOB, HPD, OATH, DOF, DCP and ACRIS datasets — compiled by NYC Property Facts.)

Owner of record
LEONG, WILLIAM
Building class
S2 · Mixed-use: two-family home with one store or office
Year built · units
1925 · 2 res.
Lot area · zoning
1,900 sq ft · R4
Market value (DOF)
$813,000 FY2027
Last priced deed
—
BBL
3073400047
BIN
3199285

How to cite: NYC Property Facts, “3051 Avenue U, Brooklyn, NY 11229 (BBL 3073400047)”, data as of 2026-11-10, https://nycpropertyfacts.com/ny/brooklyn/3051-avenue-u-3073400047. 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)
LEONG, WILLIAMThe owner name on the city’s tax records. It can lag behind recent sales and is often an LLC.
Building class
S2 – Mixed-use: two-family home with one store or officeThe Department of Finance’s category for what kind of building this is.
Land use
Mixed residential & commercialCity Planning’s broad category of how the lot is used.
Year built
1925Often an estimate for older buildings.
Floors
2
Units
2 residential / 3 totalResidential units are apartments; total includes stores and offices.
Buildings on lot
1
Lot size
1,900 sq ft (19 ft × 100 ft)
Building floor area
2,090 sq ft (incl. 1,045 sq ft commercial)
Zoning
R4, C1-2The zoning district sets what can be built and used here. Residential district; the overlay (C1/C2…) allows local retail on residential blocks.
Built vs. allowed density (FAR)
1.10 built / 1.00 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 3073400047 (Borough 3, Block 7340, Lot 47) · BIN 3199285BBL identifies the tax lot; BIN identifies each building (from DOB/HPD/footprint records).

Source: PLUTO (Dept. of City Planning) — city dataset updated 2026-08-24; last loaded 2026-11-12; Building Footprints — city dataset updated 2026-11-08; last loaded 2026-11-08; checked unchanged 2026-11-10

Tax assessment

How the Department of Finance values this lot for property tax.

Market value (tax year 2027, final roll)
$813,000The 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
$48,780The portion of market value that taxes are calculated on (capped by law for small homes).
Taxable value (final)
$27,302Assessed value minus any exemptions.
Tax class
Tax class 1 – 1–3 family homes (and some small mixed-use / vacant lots)
Tax yearRollMarket valueAssessed valueTax class
2027Final$813,000$48,7801
2026Final$753,000$45,1801
2025Final$746,000$44,7601

Source: DOF Property Valuation and Assessment Data — city dataset updated 2026-09-14; last loaded 2026-11-12

Sales & deed history 3

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.

DateTypePriceSeller (grantor)Buyer (grantee)Doc ID
2022-02-24DEED$0 / not statedEstate Of Nien He Leong; William Leong As ExecutorLeong, William2022030200463001
2001-09-18DEED$0 / not statedLeong, Suen/Decd; Leong, Nien HeLeong, Nien HeFT_3400007851040
1967-08-21DEED$0 / not statedVerona Mollie; Verona MaxLeong Nien He; Leong SuenBK_6730050500241

Source: ACRIS Real Property Master — city dataset updated 2026-11-10; last loaded 2026-11-12; ACRIS Real Property Legals — city dataset updated 2026-11-10; last loaded 2026-11-12; ACRIS Real Property Parties — city dataset updated 2026-11-10; last loaded 2026-11-12

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 2026-11-10; last loaded 2026-11-11; DOB Job Application Filings (BIS) — city dataset updated 2026-11-09; last loaded 2026-11-10

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 2026-11-09; last loaded 2026-11-10; DOB Permit Issuance (BIS) — city dataset updated 2026-11-07; last loaded 2026-11-07

DOB violations 0 active of 2

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). The active-DOB count in the summary also includes DOB NOW safety violations, listed in the next section.

StatusIssuedTypeDescriptionNumber
Resolved/dismissed
V*-DOB VIOLATION - DISMISSED
2025-11-14LBLVIO-LOW PRESSURE BOILER BOILER REQUIREDVIOLATION ISSUED-FAILURE TO FILE 2024 EXTERNAL LOW PRESSURE INSPECTIONV*111425LBLVIO14097
Resolved/dismissed
V*-DOB VIOLATION - DISMISSED
2008-01-03LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIREDV*010308LL629113585

Source: DOB Violations — city dataset updated 2026-11-11; last loaded 2026-11-11

DOB safety violations (DOB NOW) 0 active of 1

Safety violations DOB NOW publishes for devices such as boilers, elevators and gas piping (Local Law 152). Active means the published status is Active. Dismissed, cured, waived and successfully disputed violations are counted under “resolved or not active” and are not open items. Active ones are included in the summary’s active DOB violation total.

No active DOB NOW safety violations for this lot.

1 resolved or not active
StatusIssuedTypeDeviceNumberRemarks
Not active
Dismissed
2025-11-14LBLVIOBoiler111425LBLVIO14097VIOLATION ISSUED-FAILURE TO FILE 2024 EXTERNAL LOW PRESSURE INSPECTION

Source: DOB Safety Violations (DOB NOW) — city dataset updated 2026-11-11; last loaded 2026-11-11

ECB violations (DOB) 0 active of 3

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.

StatusIssuedSeverityWhat it was forPenalty / paid / balanceECB #
Resolved
Hearing: STIPULATION/IN-VIO · Certification: CERTIFICATE ACCEPTED
1990-09-24Unknown36 BOILER NOT REGISTERED$85 / $85 / $032006841K
Resolved
Hearing: CURED/IN-VIO · Certification: CURE ACCEPTED
2008-09-13CLASS - 350A) BOILER FLUED INCORRECTLY 50B) CHECK VALVE IS WRONG LOCATION 50C) BOILER HAS DIRECT FEED 50D)PRESSURE LOUNGE NEEDS ANTI SYPHON 50E) REMOVE ALL STORAGE 50F) REMOVE ALL FLAMMABLE 24B,38,15,32A,50ABCDEF$0 / $0 / $032060710H
Resolved
Hearing: CURED/IN-VIO · Certification: CURE ACCEPTED
1988-06-08Non-HazardousINSTALL SPILLAGE SWITCH AT GAS BREECHING HOOD. INADEQUATE VENTILATIONINSTALL VENTS (FRESH AIR AND EXHAUST TO OUT-DOORS)$0 / $0 / $030044633K

Source: DOB ECB Violations — city dataset updated 2026-11-11; last loaded 2026-11-11

OATH tickets (all agencies) 0 unpaid of 8

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.

StatusDateAgencyChargeRespondentImposed / paid / balanceTicket #
No balance due
HEARING COMPLETED · DISMISSED
2023-11-28Dos - Enforcement AgentsPOSTING OF SIGN PERMITNEW COYLE NAIL SALON INC$0 / $0 / $0047929990Y
Hearing pending
ASSIGNED
2023-09-22Dos - Enforcement AgentsPOSTING OF SIGN PERMITNEW COYLE NAIL SALON INC$50 / $0 / $50047929956K
No balance due
HEARING COMPLETED · IN VIOLATION
2008-09-13Dept. Of BuildingsFAIL MAINTAIN BLDG IN COMPLIANT MANNER: SERVICE EQUIPMENT - BOILERLEON G— / — / —032060710H
No balance due
PAID IN FULL
2007-06-09Dos - Enforcement AgentsSIDEWALK OBSTRUCTIONCOYLE NAILS$100 / $100 / —041370304M
No balance due Default
PAID IN FULL · DEFAULT
2002-07-11$80 / $80 / —0129885544
No balance due Default
PAID IN FULL · DEFAULT
2002-07-11$25 / $25 / —0129885553
No balance due Default
PAID IN FULL · DEFAULT
2002-07-11$80 / $80 / —0129885535
No balance due
PAID IN FULL · STIPULATED
1990-09-24LEONG$85 / $85 / $0032006841K

Source: OATH Hearings Division Case Status — city dataset updated 2026-11-11; last loaded 2026-11-12

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.

No HPD registration found. Registration is required for buildings with 3 or more apartments (and for 1–2 family homes where neither the owner nor family lives there).

Source: HPD Multiple Dwelling Registrations — city dataset updated 2026-11-04; last loaded 2026-11-10; HPD Registration Contacts — city dataset updated 2026-11-04; last loaded 2026-11-10

HPD housing-code violations 0 open of 0

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.

No records found in this dataset for this lot.

Source: HPD Housing Maintenance Code Violations — city dataset updated 2026-11-11; last loaded 2026-11-11

HPD complaints 0

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.

No records found in this dataset for this lot.

Source: HPD Housing Maintenance Code Complaints and Problems — city dataset updated 2026-11-11; last loaded 2026-11-11

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 2026-11-11; last loaded 2026-11-12

Nearby properties

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

More in Madison: Open HPD violations · Active DOB violations · Active ECB violations · Open DOB jobs · Unpaid OATH tickets

Closest on Ave U

Same tax block (7340), closest first

All properties on Ave U, Brooklyn · Brooklyn 11229

Open-item counts as of November 10, 2026; each section lists its own dataset date. Machine-readable: JSON API · Markdown · Plain text · API & MCP docs