4237 Byron Avenue, Bronx, NY 10466

Name: NYC Open Data records for 4237 Byron Avenue, Bronx, NY 10466
Creator: NYC Property Facts
License: https://opendata.cityofnewyork.us/overview/#termsofuse

BBL 2049980085 (Borough 2, Block 4998, Lot 85) · BIN 2068217 · Last updated: October 31, 2026

Summary · as of October 31, 2026

4237 Byron Avenue (Bronx, NY 10466; tax lot BBL 2049980085) is a 3-unit walk-up apartment building (building class C0: three-family walk-up), built around 1899, on a 2,533 sq ft lot zoned R5. City tax records list the owner as SADLER, OBRIEN; per ACRIS, a deed to this owner dated January 18, 2007 lists a price of $585,000. The Department of Finance's final market value for tax year 2027 is $885,000. As of October 31, 2026, NYC Open Data shows eight open HPD violations. (Source: NYC Open Data — DOB, HPD, OATH, DOF, DCP and ACRIS datasets — compiled by NYC Property Facts.)

Owner of record: SADLER, OBRIEN
Building class: C0 · Three-family walk-up
Year built · units: 1899 · 3 res.
Lot area · zoning: 2,533 sq ft · R5
Market value (DOF): $885,000 FY2027
Last priced deed: $585,000 · 2007-01-18
BBL: 2049980085
BIN: 2068217

0Open DOB jobs (permit issued, no sign-off)
0Active DOB violations
0Active ECB violations
8Open HPD violations
0OATH tickets with unpaid balance

How to cite: NYC Property Facts, “4237 Byron Avenue, Bronx, NY 10466 (BBL 2049980085)”, data as of 2026-10-31, https://nycpropertyfacts.com/ny/bronx/4237-byron-avenue-2049980085. 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): SADLER, OBRIENThe owner name on the city’s tax records. It can lag behind recent sales and is often an LLC.
Building class: C0 – Three-family walk-upThe 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: 1899Often an estimate for older buildings.
Floors: 2
Units: 3 residential / 3 totalResidential units are apartments; total includes stores and offices.
Buildings on lot: 1
Lot size: 2,533 sq ft (25.33 ft × 100 ft)
Building floor area: 3,522 sq ft
Zoning: R5The zoning district sets what can be built and used here. Residential district.
Built vs. allowed density (FAR): 1.39 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 2049980085 (Borough 2, Block 4998, Lot 85) · BIN 2068217BBL 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 2026-11-01; 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): $885,000The 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: $53,100The portion of market value that taxes are calculated on (capped by law for small homes).
Taxable value (final): $37,823Assessed 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	$885,000	$53,100	1
2026	Final	$975,000	$58,500	1
2025	Final	$920,000	$55,200	1

Source: DOF Property Valuation and Assessment Data — city dataset updated 2026-09-14; data as of 2026-11-01

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
2007-01-18	DEED	$585,000	Cortes, Bernandino; Cortes, Ramona	Sadler, Maxine; Sadler, Obrien	2007012201812001
1988-07-25	DEED	$0 / not stated	Cortes, Ramona; Cortes, Bernandino; Medina, Rafael; Medina, Rahael/Fka	Cortes, Bernandino; Cortes, Ramona	FT_2740000730374
1982-06-07	DEED	$0 / not stated	Pena, Magda; Pena, Jesus	Medina, Raphael; Cortes, Ramoma; Cortes, Bernardino Jr.	FT_2230000562823
1981-01-29	DEED	$0 / not stated	Ferrante Antoinetta; Ferrante Raffaele	Jesus Pena; Madga Pena	BK_8120043501828
1977-02-22	DEED	$0 / not stated	Tanni Giovanni; Tanni Stella	Raffaele Ferrante	BK_7720032700100

Source: ACRIS Real Property Master — city dataset updated 2026-10-08; data as of 2026-11-01; ACRIS Real Property Legals — city dataset updated 2026-10-08; data as of 2026-11-01; ACRIS Real Property Parties — city dataset updated 2026-10-08; data as of 2026-11-01

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 2026-10-31; data as of 2026-11-01; DOB Job Application Filings (BIS) — city dataset updated 2026-10-30; data as of 2026-10-31

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 2026-10-31; data as of 2026-11-01; 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 2026-10-31; data as of 2026-11-01

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 2026-11-01

OATH tickets (all agencies) 0 unpaid of 29

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 Default PAID IN FULL · DEFAULTED	2025-08-15	Dos - Enforcement Agents	IMPROPER RECEPTACLE FAILURE TO CONTAINERIZE - RESIDENTIAL 1ST	SADLER OBRIEN	$80 / $80 / $0	049340878P
No balance due PAID IN FULL	2023-12-14	Dos - Enforcement Agents	DIRTY AREA	SADLER OBRIEN	$50 / $50 / $0	048226649X
No balance due PAID IN FULL	2023-08-15	Dos - Enforcement Agents	RECYC PLACED FOR COLLECTION W NON-RECYC 1 TO 8 DWELLING UNITS	SADLER OBRIEN	$25 / $25 / $0	048045044K
No balance due PAID IN FULL	2022-07-21	Sanitation Police	FAILURE TO PROPERLY PUT RECYCS OUT FOR COLLECTION 1TO8DWELLING UNITS	SADLER OBRIEN	$25 / $25 / $0	047511568K
No balance due PAID IN FULL	2020-01-09	Sanitation Others	FAILURE TO CLEAN 18 INCHES INTO STREET	SADLER	$100 / $100 / $0	0210184040
No balance due PAID IN FULL	2017-12-22	Dos - Enforcement Agents	FAILURE TO PROPERLY PUT RECYCS OUT FOR COLLECTION 1TO8DWELLING UNITS	SADLER	$25 / $25 / $0	045360811N
No balance due Default PAID IN FULL · DEFAULTED	2017-10-03	Sanitation Others	FAILURE TO CLEAN 18 INCHES INTO STREET	SADLER	$130 / $130 / $0	0196954533
No balance due PAID IN FULL	2017-02-18		IMPROPER RECEPTACLES 1ST OFFENSE	SADLER	$100 / $100 / —	0194209520
No balance due Default PAID IN FULL · DEFAULT	2016-02-27		FAILURE TO PROPERLY PUT RECYCS OUT FOR COLLECTION 1TO8DWELLING UNITS	SADLER	$25 / $25 / —	0191940807
No balance due Default PAID IN FULL · DEFAULT	2014-07-25	Sanitation Dept	FAILURE TO PROPERLY PUT RECYCS OUT FOR COLLECTION 1TO8DWELLING UNITS	SADLER	$25 / $25 / —	043198808R
No balance due Default PAID IN FULL · DEFAULT	2014-01-10	Sanitation Dept	FAILURE TO PROPERLY PUT RECYCS OUT FOR COLLECTION 1TO8DWELLING UNITS	SADLER	$25 / $25 / —	042976333Y
No balance due PAID IN FULL · IN VIOLATION	2012-10-04	Dos - Enforcement Agents	STORAGE OF RECEPTACLES	SADLER	$100 / $100 / —	040005731P

Showing 12 of 29 records. The API and the source dataset have the full list.

Source: OATH Hearings Division Case Status — city dataset updated 2026-11-01; data as of 2026-11-01

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: 54416
Last registered: 2013-01-30
Registration valid until: 2013-09-15 ExpiredRegistrations must be renewed every year.

Role	Name	Business city
Headofficer	Obrien Sadler	Bronx, Ny
Officer	Maxine Sadler	Bronx, Ny
Agent	Obrien Sadler	Bronx, Ny

Source: HPD Multiple Dwelling Registrations — city dataset updated 2026-10-28; data as of 2026-11-01; HPD Registration Contacts — city dataset updated 2026-10-28; data as of 2026-11-01

HPD housing-code violations 8 open of 8

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	Condition
Open Info Nov Sent Out · 2025-11-24	I	2025-11-24	§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 Info Nov Sent Out · 2024-12-03	I	2024-12-03	§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 Info Nov Sent Out · 2023-11-27	I	2023-11-27	§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 Info Nov Sent Out · 2022-11-16	I	2022-11-16	§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 Info Nov Sent Out · 2022-03-16	I	2022-03-16	§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 Info Nov Sent Out · 2021-04-21	I	2021-04-21	§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 Info Nov Sent Out · 2019-11-07	I	2019-11-07	§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 Info Nov Sent Out · 2018-01-10	I	2018-01-10	§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 2026-10-31; data as of 2026-11-01

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 2026-11-01; data as of 2026-11-01

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 2026-11-01; data as of 2026-11-01

Nearby properties

On Byron Ave

Same tax block (4998)

All properties on Byron Ave, Bronx · All of Bronx 10466 (Wakefield-Woodlawn)

Open-item counts as of October 31, 2026; each section lists its own dataset date. Machine-readable: JSON API · Markdown · Plain text · API & MCP docs