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8401 3rd Avenue, Brooklyn, NY 11209

BBL 3060250010 (Borough 3, Block 6025, Lot 10) · BIN 3152747, 3340020 · Last updated:

Also recorded in city data as: 304 84 St · 308 84 St

Summary · as of October 31, 2026

8401 3rd Avenue (Brooklyn, NY 11209; tax lot BBL 3060250010) is a 6-unit mixed-use building with apartments and ground-floor commercial space (building class S9: mixed-use: dwelling with stores or offices, miscellaneous), built around 1923, on a 1,760 sq ft lot zoned R6B. City tax records list the owner as 304-308 REALTY. The Department of Finance's final market value for tax year 2027 is $1,098,000. As of October 31, 2026, NYC Open Data shows two DOB jobs with a permit issued but no sign-off, two active DOB violations, six open HPD violations and one OATH ticket with an unpaid balance. There were two 311 requests in the past 12 months and four HPD complaints since 2019. (Source: NYC Open Data — DOB, HPD, OATH, DOF, DCP and ACRIS datasets — compiled by NYC Property Facts.)

Owner of record
304-308 REALTY
Building class
S9 · Mixed-use: dwelling with stores or offices, miscellaneous
Year built · units
1923 · 6 res.
Lot area · zoning
1,760 sq ft · R6B
Market value (DOF)
$1,098,000 FY2027
Last priced deed
—
BBL
3060250010
BIN
3152747, 3340020

How to cite: NYC Property Facts, “8401 3rd Avenue, Brooklyn, NY 11209 (BBL 3060250010)”, data as of 2026-10-31, https://nycpropertyfacts.com/ny/brooklyn/8401-3rd-avenue-3060250010. 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)
304-308 REALTYThe owner name on the city’s tax records. It can lag behind recent sales and is often an LLC.
Building class
S9 – Mixed-use: dwelling with stores or offices, miscellaneousThe 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
1923Often an estimate for older buildings.
Floors
4
Units
6 residential / 8 totalResidential units are apartments; total includes stores and offices.
Buildings on lot
2
Lot size
1,760 sq ft (22 ft × 80 ft)
Building floor area
6,512 sq ft (incl. 1,760 sq ft commercial)
Zoning
R6B, C2-3, BRThe 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)
3.70 built / 2.00 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 3060250010 (Borough 3, Block 6025, Lot 10) · BIN 3152747, 3340020BBL 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; 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)
$1,098,000The 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
$494,100The portion of market value that taxes are calculated on (capped by law for small homes).
Taxable value (final)
$321,555Assessed value minus any exemptions.
Tax class
Tax class 2B – residential rental, 7–10 units
Tax yearRollMarket valueAssessed valueTax class
2027Final$1,098,000$494,1002B
2026Final$915,000$411,7502B
2025Final$1,084,000$487,8002B

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.

DateTypePriceSeller (grantor)Buyer (grantee)Doc ID
2001-11-15DEED$0 / not statedLeonardos, Mihail G; Leonardos, Dimitra304-308 Realty LlcFT_3450007933045
1979-04-09DEED$0 / not statedNikolakakos DemetriosLeonardos Dimitra; Leonardos Mihail GBK_7930106500222
1976-05-27DEED$0 / not statedNikolakakos Demetrios; Lambrakos AndreasNikolakakos DemetriosBK_7630084900835
1972-09-29DEED$0 / not statedMafoud Tony J; Rodriguez EloyNikolakakos Demetrios; Lambrakos AndreasBK_7230058500227
1971-04-12DEED$0 / not statedWitek Rosalia; Witch RoseMafoud Tony J; Rodriguez EloyBK_7130047501543

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 2 open of 2

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.

StatusJob #TypeFiledEst. cost
Permitted, not signed off
PERMIT ISSUED - ENTIRE JOB/WORK · 2018-11-17
340646554
BIS
A3 – Minor alteration (one type of work)2018-11-14$31,500
Permitted, not signed off
Permit Entire · 2020-12-28
B00094836-I1
DOB NOW
Alteration2018-11-07$7,000

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 2

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.

IssuedExpiresJob #WorkPermit status
2018-11-172019-05-08340646554
BIS
Alteration / Other / general constructionISSUED (initial)
2018-11-082019-09-19B00094836-I1
DOB NOW
Sidewalk Shed
PROPOSED INSTALLATION OF HEAVY DUTY SIDEWALK SHED FOR REMEDIAL REPAIRS AS PER PLANS. NO CHANGE IN USE OCCUPANCY OR EGRESS UNDER THIS APPLICATION. LIVE LOAD 300
Permit Issued

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 2 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).

StatusIssuedTypeDescriptionNumber
Active
V-DOB VIOLATION - ACTIVE
2018-04-06LBLVIO-LOW PRESSURE BOILER BOILER REQUIREDVIOLATION ISSUED FOR FAILURE TO FILE ANNUAL BOILER 2016 INSPECTION REPORTV040618LBLVIO07556
Active
V-DOB VIOLATION - ACTIVE
2014-05-15LBLVIO-LOW PRESSURE BOILER BOILER REQUIREDVIOLATION ISSUED FOR FAILURE TO FILE ANNUAL BOILER 2012 INSPECTION REPORTV051514LBLVIO11402

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) 1 unpaid of 21

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 #
Unpaid balance Default
DOCKETED · DEFAULTED
2026-03-25Dept Of TransportationOP OF A S W CAFE RDWY CAFE W O A LICENSE REVOC CONSENT 1ST OFFENSECAFFE CAFE$500 / $0 / $5000221091961
No balance due Default
PAID IN FULL · DEFAULTED
2024-10-25Sanitation OthersIMPROPER RECEPTACLE ALL BUSINESSES 1STCAFFE CAFE$80 / $80 / $0048743224X
No balance due
PAID IN FULL
2024-09-27Sanitation OthersSTORAGE OF RECEPTACLES PLACED OUT PRIOR TO 8PM WITHOUT A RECEPTACLE304-308 REALTY$50 / $50 / $0048521683L
No balance due
PAID IN FULL
2021-07-10Dos - Enforcement AgentsFAILURE TO PROPERLY PUT RECYCS OUT FOR COLLECTION 1TO8DWELLING UNITS304-308 REALTY$25 / $25 / $0046946386X
No balance due
WRITTEN OFF · WRITTEN OFF
2016-07-21Dos - Enforcement AgentsSIDEWALK OBSTRUCTIONNANCE CORP$300 / $50 / $0041419992J
No balance due
PAID IN FULL · IN VIOLATION
2016-07-16Sanitation DeptFAILURE TO BUNDLE NEWSPAPES MAGAZINES CARDBOARD 1 TO 8 DWELLING UNITS304-308 REALTY$25 / $25 / —042039996Z
No balance due
PAID IN FULL
2016-07-02Sanitation DeptNON-RECYC LEFT IN RECYC CONTAINER FOR COLLECTION 1TO8 DWELLING UNITS304-308 REALTY$25 / $25 / —0188765051
No balance due
PAID IN FULL
2015-02-22Sanitation DeptSNOW,ICE DIRT ON SIDEWALKS304-308 REALTY$100 / $100 / —041538427Z
No balance due
PAID IN FULL
2011-04-20Dos - Enforcement AgentsSIDEWALK OBSTRUCTIONSIDEWALK CAFE$100 / $100 / —041583753R
No balance due
PAID IN FULL · IN VIOLATION
2010-09-26Dos - Enforcement AgentsSTORAGE OF RECEPTACLES304-308 REALTY$100 / $100 / —041323684L
No balance due
PAID IN FULL
2010-04-21Dos - Enforcement AgentsSIDEWALK OBSTRUCTION8401 3RD AVE CORP$100 / $100 / —041892426Z
No balance due Default
PAID IN FULL · DEFAULTED
2009-02-21Dos - Enforcement AgentsFAILURE TO PROPERLY PUT RECYCLABLES OUT FOR COLLECTION304-308 REALTY$25 / $25 / —041910970Z

Showing 12 of 21 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
128205
Last registered
2026-08-26
Registration valid until
2027-09-01 CurrentRegistrations must be renewed every year.
RoleNameCompanyBusiness city
AgentNikolaos LeonardosDAFNONAS ESTATES LTDBrooklyn, Ny
HeadofficerNikolaos LeonardosBrooklyn, Ny
SitemanagerNikolaos Leonardos
Corporateowner304-308 REALTY LLCBrooklyn, 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 6 open of 12

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.

StatusClassIssuedAptCondition
Open
Nov Sent Out · 2020-07-07
A2020-07-07§ 27-2045 ADM CODE POST A PROPER NOTICE OF SMOKE DETECTOR REQUIREMENTS, IN A FORM APPROVED BY THE COMMISSIONER, AT OR NEAR THE MAIL BOX .. AT PUBLIC HALL, 1st STORY
Open
Nov Sent Out · 2020-07-07
A2020-07-07§ 27-2046.1 HMC: POST A PROPER NOTICE OF CARBON MONOXIDE DETECTING DEVICE REQUIREMENTS, IN A FORM APPROVED BY THE COMMISSIONER, IN A COMMON AREA OF A CLASS A MULTIPLE DWELLING NEAR INSPECTION CERTIFICATE OR PROVIDE NOTICE TO TENANTS IN A PRIVATE DWELLING. AT P
Open
Nov Sent Out · 2020-07-07
A2020-07-07§ 27-2005 HMC: POST, IN A FORM APPROVED BY THE COMMISSIONER, AND MAINTAIN A NOTICE IN A COMMON AREA OF THE BUILDING REGARDING THE PROCEDURES THAT SHOULD BE FOLLOWED WHEN A GAS LEAK IS SUSPECTED AT PUBLIC HALL
Open
Nov Sent Out · 2020-07-07
A2020-07-07§ 27-2104 ADM CODE POST AND MAINTAIN A PROPER SIGN ON WALL OF ENTRANCE STORY SHOWING THE REGISTRATION NUMBER ASSIGNED BY THE DEPARTMENT AND THE ADDRESS OF THE BUILDING. AT PUBLIC HALL, 1st STORY
Open
Nov Certified Late · 2019-12-06
C2019-11-21§ 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 ON WALL AT PUBLIC HALL, 1st STORY
Open
False Certification · 2015-05-22
C2015-04-206SECTION 27-2043.1 HMC INSTALL THE MISSING OR REPAIR/REPLACE THE DEFECTIVE WINDOW GUARD(S) IN ACCORDANCE WITH THE SPECIFICATIONS OF THE NEW YORK CITY HEALTH CODE SECTION 24 RCNY CHAPTER 12. WG TO INSTALL = 1; WG TO REPLACE = 5; WG TO REPAIR = 5; MISSING-NO ONE
Closed
Violation Dismissed · 2021-04-16
A2021-04-05(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.
Closed
Violation Dismissed · 2015-08-26
C2015-05-266§ 27-2043.1 HMC INSTALL THE MISSING OR REPAIR/REPLACE THE DEFECTIVE WINDOW GUARD(S) IN ACCORDANCE WITH THE SPECIFICATIONS OF THE NEW YORK CITY HEALTH CODE SECTION 24 RCNY CHAPTER 12. WG TO INSTALL = 0; WG TO REPLACE = 3; WG TO REPAIR = 3; NO ONE WAY SREWS IN T
Closed
Violation Closed · 2015-06-02
C2015-05-15SECTION 27-2005 ADM CODE & 309 M/D LAW ABATE THE NUISANCE CONSISTING OF FREE STANDING RADIATOR AT INTERMEDIATE LANDING AT PUBLIC HALL, 4th STORY
Closed
Violation Closed · 2015-05-26
C2015-04-20SECTION 27-2005 ADM CODE & 309 M/D LAW ABATE THE NUISANCE CONSISTING OF FREE STANDING RADIATOR AT INTERMEDIATE LANDING AT PUBLIC HALL STAIRS, 4th STORY
Closed
Violation Dismissed · 2015-04-28
I2015-02-05SECTION27-2107 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 P
Closed
Violation Closed · 2016-05-02
C2000-10-101SECTION 27-2056.5 ADM CODE - CORRECT THE LEAD-BASED PAINT HAZARD - PRESUMED LEAD PAINT THAT IS PEELING OR IS ON A DETERIORATED SUBSURFACE - USING EXCLUSIVE INTERIM CONTROLS. CEILING IN THE BATHROOM LOCATED AT APT 1, 2nd STORY, 1st APARTMENT FROM SOUTH AT WEST

Source: HPD Housing Maintenance Code Violations — city dataset updated 2026-10-31; data as of 2026-11-01

HPD complaints 4

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.

ReceivedStatusAptProblem(s)Outcome
2020-06-27CLOSE3BElectric – Power OutageThe Department of Housing Preservation and Development inspected the following conditions. No violations were issued. The complaint has been closed.
2019-11-17CLOSE1Heat/Hot Water – Entire BuildingThe 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
2019-10-31CLOSE5Heat/Hot Water – Entire BuildingThe 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
2019-01-13CLOSE4Heat/Hot Water – Apartment OnlyThe 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

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) 2

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.

OpenedAgencyComplaintStatusClosed
2026-08-12DOBElevator – Elevator - Single Device On Property/No Alternate ServiceClosed2026-08-19
2026-02-19DHSHomeless Person Assistance – ChronicClosed2026-02-20

Source: 311 Service Requests from 2020 to Present — city dataset updated 2026-11-01; data as of 2026-11-01

Nearby properties

On 3 Ave

Same tax block (6025)

All properties on 3 Ave, Brooklyn · All of Brooklyn 11209 (Bay Ridge)

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