9511 Avenue B, Brooklyn, NY 11236
BBL 3047550009 (Borough 3, Block 4755, Lot 9) · BIN 3105080 · Last updated:
Summary · as of November 6, 2026
9511 Avenue B (Brooklyn, NY 11236; tax lot BBL 3047550009) is a two-family home (building class B3: two-family home converted from one-family), built around 1945, on a 2,267 sq ft lot zoned R5. City tax records list the owner as NELSON, ORSON; per ACRIS, a deed to this owner dated April 20, 2005 lists a price of $332,500. The Department of Finance's final market value for tax year 2027 is $631,000. As of November 6, 2026, NYC Open Data shows two open HPD violations. There was one 311 request 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.)
- Owner of record
- NELSON, ORSON
- Building class
- B3 · Two-family home converted from one-family
- Year built · units
- 1945 · 2 res.
- Lot area · zoning
- 2,267 sq ft · R5
- Market value (DOF)
- $631,000 FY2027
- Last priced deed
- $332,500 · 2005-04-20
- BBL
- 3047550009
- BIN
- 3105080
- 0Open DOB jobs (permit issued, no sign-off)
- 0Active DOB violations
- 0Active ECB violations
- 2Open HPD violations
- 0OATH tickets with unpaid balance
How to cite: NYC Property Facts, “9511 Avenue B, Brooklyn, NY 11236 (BBL 3047550009)”, data as of 2026-11-06, https://nycpropertyfacts.com/ny/brooklyn/9511-avenue-b-3047550009. 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)
- NELSON, ORSONThe owner name on the city’s tax records. It can lag behind recent sales and is often an LLC.
- Building class
- B3 – Two-family home converted from one-familyThe Department of Finance’s category for what kind of building this is.
- Land use
- One- & two-family buildingsCity Planning’s broad category of how the lot is used.
- Year built
- 1945Often an estimate for older buildings.
- Floors
- 1
- Units
- 2 residential / 2 totalResidential units are apartments; total includes stores and offices.
- Buildings on lot
- 1
- Lot size
- 2,267 sq ft (22.67 ft × 100 ft)
- Building floor area
- 1,771 sq ft
- Zoning
- R5The zoning district sets what can be built and used here. Residential district.
- Built vs. allowed density (FAR)
- 0.78 built / 1.50 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 3047550009 (Borough 3, Block 4755, Lot 9) · BIN 3105080BBL 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 2026-11-06; 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)
- $631,000The 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
- $37,860The portion of market value that taxes are calculated on (capped by law for small homes).
- Taxable value (final)
- $34,056Assessed value minus any exemptions.
- Tax class
- Tax class 1 – 1–3 family homes (and some small mixed-use / vacant lots)
| Tax year | Roll | Market value | Assessed value | Tax class |
|---|---|---|---|---|
| 2027 | Final | $631,000 | $37,860 | 1 |
| 2026 | Final | $589,000 | $35,340 | 1 |
| 2025 | Final | $515,000 | $30,900 | 1 |
Source: DOF Property Valuation and Assessment Data — city dataset updated 2026-09-14; data as of 2026-11-06
Sales & deed history 5
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 |
|---|---|---|---|---|---|
| 2006-10-02 | DEED | $0 / not stated | Nelson, Orson | Nelson, Choral H; Nelson, Orson | 2007032601667001 |
| 2005-04-20 | DEED | $332,500 | Siddons , Ricardo | Nelson, Orson | 2005042802020001 |
| 1986-12-17 | DEED | $0 / not stated | Douglas, Philmore A; Douglas, Milagros | Siddons, Ricardo | FT_3360001235236 |
| 1983-08-01 | DEED | $0 / not stated | Brent-Harris, Winnifred | Douglas, Milagros; Douglas, Philmore A | FT_3770000971777 |
| 1973-12-18 | DEED | $0 / not stated | Dubrow Edwin; Dubrow Ruth | Brent Harris Winnifred | BK_7330067900233 |
Source: ACRIS Real Property Master — city dataset updated 2026-10-08; data as of 2026-11-06; ACRIS Real Property Legals — city dataset updated 2026-10-08; data as of 2026-11-06; ACRIS Real Property Parties — city dataset updated 2026-10-08; data as of 2026-11-06
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 2026-11-05; data as of 2026-11-06; DOB Job Application Filings (BIS) — city dataset updated 2026-11-05; data as of 2026-11-06
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 2026-11-05; data as of 2026-11-06; DOB Permit Issuance (BIS) — city dataset updated 2026-10-31; data as of 2026-10-31
DOB violations 0 active of 0
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).
No records found in this dataset for this lot.
Source: DOB Violations — city dataset updated 2026-11-05; data as of 2026-11-06
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 2026-11-05; data as of 2026-11-06
OATH tickets (all agencies) 0 unpaid of 2
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 # |
|---|---|---|---|---|---|---|
| No balance due PAID IN FULL | 2014-09-17 | FAILURE TO BUNDLE NEWSPAPES MAGAZINES CARDBOARD 1 TO 8 DWELLING UNITS | NELSON | $25 / $25 / — | 0182996166 | |
| No balance due PAID IN FULL | 2007-07-10 | Sanitation Recycling | STORAGE OF RECEPTACLES | NELSON | $100 / $100 / — | 040441387X |
Source: OATH Hearings Division Case Status — city dataset updated 2026-11-06; data as of 2026-11-06
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; data as of 2026-11-06; HPD Registration Contacts — city dataset updated 2026-11-04; data as of 2026-11-06
HPD housing-code violations 2 open of 2
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 · 2025-08-22 | B | 2025-08-22 | 1 | HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF ROACHES IN THE ENTIRE APARTMENT LOCATED AT BSMT-APT 1, 1st BSMT-APT FROM SOUTH AT WEST |
| Open Nov Sent Out · 2025-08-22 | B | 2025-08-22 | 1 | § 27-2073 ADM CODE - PROVIDE AN ADEQUATE SUPPLY OF GAS TO THE FIXTURES AT GAS RANGE IN THE KITCHEN LOCATED AT BSMT-APT 1, 1st BSMT-APT FROM SOUTH AT WEST |
Source: HPD Housing Maintenance Code Violations — city dataset updated 2026-11-05; data as of 2026-11-06
HPD complaints 2
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 |
|---|---|---|---|---|
| 2025-08-14 | CLOSE | 1 | Unsanitary Condition – Pests Appliance – Electric/Gas Range | 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 |
| 2025-08-05 | CLOSE | 1 | Unsanitary Condition – Pests Electric – No Lighting | 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 in |
Source: HPD Housing Maintenance Code Complaints and Problems — city dataset updated 2026-11-06; data as of 2026-11-06
311 requests (last 12 months) 1
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.
| Opened | Agency | Complaint | Status | Closed |
|---|---|---|---|---|
| 2026-01-20 | NYPD | Blocked Driveway – No Access | Closed | 2026-01-20 |
Source: 311 Service Requests from 2020 to Present — city dataset updated 2026-11-06; data as of 2026-11-06
Nearby properties
More in Canarsie: Open HPD violations · Active DOB violations · Active ECB violations · Open DOB jobs · Unpaid OATH tickets
On Ave B
- 9512 Avenue B (eight open items)
- 9509 Avenue B
- 9508 Avenue B
- 9514 Avenue B
- 9515 Avenue B
- 9506 Avenue B
- 9517 Avenue B
- 9505 Avenue B
- 9518 Avenue B
- 9503 Avenue B
Same tax block (4755)
Open-item counts as of November 6, 2026; each section lists its own dataset date. Machine-readable: JSON API · Markdown · Plain text · API & MCP docs