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441 6th Avenue, Park Slope, Brooklyn, NY 11215

BBL 3010060001 (Borough 3, Block 1006, Lot 1) · BIN 3022144 · Last updated: · Park Slope · ZIP 11215

Also recorded in city data as: 431 6 Ave · 427 6 Ave · 4314 6 Ave · 350 8 St · 429 6 Ave

Summary · as of November 10, 2026

441 6th Avenue (Brooklyn, NY 11215; tax lot BBL 3010060001) is a public assembly or cultural building (building class P8: place of public assembly or cultural facility (subtype P8)), built around 1906, on a 17,600 sq ft lot zoned R6B. City tax records list the owner as BROOKLYN PUBLIC LIBRARY. The Department of Finance's final market value for tax year 2027 is $3,155,000. As of November 10, 2026, NYC Open Data shows two DOB jobs with a permit issued but no sign-off, nine active DOB violations (three BIS violations and six DOB NOW safety violations) and two OATH tickets with an unpaid balance. There were 22 311 requests in the past 12 months and no HPD complaints since 2019. (Source: NYC Open Data — DOB, HPD, OATH, DOF, DCP and ACRIS datasets — compiled by NYC Property Facts.)

Owner of record
BROOKLYN PUBLIC LIBRARY
Building class
P8 · Place of public assembly or cultural facility
Year built · units
1906 · 0 res.
Lot area · zoning
17,600 sq ft · R6B
Market value (DOF)
$3,155,000 FY2027
Last priced deed
—
BBL
3010060001
BIN
3022144

How to cite: NYC Property Facts, “441 6th Avenue, Brooklyn, NY 11215 (BBL 3010060001)”, data as of 2026-11-10, https://nycpropertyfacts.com/ny/brooklyn/441-6th-avenue-3010060001. 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)
BROOKLYN PUBLIC LIBRARYThe owner name on the city’s tax records. It can lag behind recent sales and is often an LLC.
Building class
P8 – Place of public assembly or cultural facility (subtype P8)The Department of Finance’s category for what kind of building this is.
Land use
Public facilities & institutionsCity Planning’s broad category of how the lot is used.
Year built
1906Often an estimate for older buildings.
Floors
2
Units
0 residential / 0 totalResidential units are apartments; total includes stores and offices.
Buildings on lot
1
Lot size
17,600 sq ft (180 ft × 97.83 ft)
Building floor area
7,852 sq ft (incl. 7,852 sq ft commercial)
Zoning
R6BThe zoning district sets what can be built and used here. Residential district.
Built vs. allowed density (FAR)
0.45 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).
Landmark
INDIVIDUAL LANDMARK
Identifiers
BBL 3010060001 (Borough 3, Block 1006, Lot 1) · BIN 3022144BBL 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 2026-11-10; 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)
$3,155,000The 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
$1,419,750The portion of market value that taxes are calculated on (capped by law for small homes).
Taxable value (final)
$1,419,750Assessed value minus any exemptions.
Tax class
Tax class 4 – commercial / industrial
Tax yearRollMarket valueAssessed valueTax class
2027Final$3,155,000$1,419,7504
2026Final$3,082,000$1,386,9004
2025Final$3,014,000$1,356,3004

Source: DOF Property Valuation and Assessment Data — city dataset updated 2026-09-14; last loaded 2026-11-10

Sales & deed history 0

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.

No records found in this dataset for this lot.

Source: ACRIS Real Property Master — city dataset updated 2026-10-08; last loaded 2026-11-10; ACRIS Real Property Legals — city dataset updated 2026-10-08; last loaded 2026-11-10; ACRIS Real Property Parties — city dataset updated 2026-10-08; last loaded 2026-11-10

DOB job filings 2 open of 13

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 Entire · 2025-12-17
B01335617-I1
DOB NOW
Alteration2025-12-17$1,500
Permitted, not signed off
PERMIT ISSUED - ENTIRE JOB/WORK · 2012-03-21
310170141
BIS
A1 – Major alteration (changes use, egress or occupancy)2008-06-23$600,000
Not open
LOC Issued · 2020-12-28
B00061997-I1
DOB NOW
Alteration2018-08-21$1,200
Not open
LOC Issued · 2020-12-28
B00062005-I1
DOB NOW
Alteration2018-08-21$550
Not open
LOC Issued · 2020-12-28
B00062020-I1
DOB NOW
Alteration2018-08-21$550
Not open
SIGNED OFF · 2015-12-24
320966175
BIS
A2 – Alteration with multiple work types (no change to use/occupancy)2014-11-20$65,400
Not open
SIGNED OFF · 2014-02-12
320520094
BIS
A2 – Alteration with multiple work types (no change to use/occupancy)2012-07-27$10,000
Not open
SIGNED OFF · 2017-04-04
320342081
BIS
A2 – Alteration with multiple work types (no change to use/occupancy)2011-07-27$50,000
Not open
SIGNED OFF · 2012-10-25
320340886
BIS
A2 – Alteration with multiple work types (no change to use/occupancy)2011-07-22$8,000
Not open
SIGNED OFF · 2012-11-13
320147364
BIS
A2 – Alteration with multiple work types (no change to use/occupancy)2010-04-07$5,000
Not open
SIGNED OFF · 2013-01-30
320055391
BIS
A2 – Alteration with multiple work types (no change to use/occupancy)2009-08-18$36,000
Not open
SIGNED OFF · 2011-03-03
302307563
BIS
A2 – Alteration with multiple work types (no change to use/occupancy)2007-03-07$250,000
Not open
SIGNED OFF · 2018-08-03
300590028
BIS
A2 – Alteration with multiple work types (no change to use/occupancy)1996-10-23$10,000

Source: DOB NOW: Build – Job Application Filings — city dataset updated 2026-11-09; last loaded 2026-11-10; DOB Job Application Filings (BIS) — city dataset updated 2026-11-09; last loaded 2026-11-10

Work permits 20

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
2025-12-172026-12-17B01335617-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
2018-09-172018-09-28B00062020-I1
DOB NOW
Sign
NON ILLUMINATED NON ADVERTISING DOUBLE FACED PROJECTING ACCESSORY BANNER SIGN - INSIDE PROPERTY LINES - PARK SLOPE BKLYN PUBLIC LIBRARY. NO CHANGE TO USE, EGR
Signed-off
2018-09-172018-09-28B00062005-I1
DOB NOW
Sign
NON ILLUMINATED NON ADVERTISING DOUBLE FACED PROJECTING ACCESSORY BANNER SIGN - INSIDE PROPERTY LINES -PARK SLOPE BKLYN PUBLIC LIBRARY. NO CHANGE TO USE, EGRESS
Signed-off
2018-09-172018-09-28B00061997-I1
DOB NOW
Sign
ILLUMINATED NON ADVERTISING ACCESSORY NYC LIBRARY IDENTIFICATION GROUND SIGN WITH DIGITAL DISPLAY - INSIDE PROPERTY LINES - PARK SLOPE LIBRARY. NO CHANGE TO USE
Signed-off
2012-08-172013-08-17320520094
BIS
Plumbing / PlumbingISSUED (initial)
2012-08-082013-07-01320520094
BIS
Equipment work / Other / general constructionRE-ISSUED (initial)
2012-08-082013-07-01320520094
BIS
Equipment work / Mechanical/HVACISSUED (initial)
2012-03-212013-02-14320342081
BIS
Equipment work / Other / general constructionISSUED (initial)
2012-03-212013-02-14320147364
BIS
Equipment work / Other / general constructionISSUED (renewal)
2012-03-212013-02-14320340886
BIS
Equipment work / Other / general constructionISSUED (renewal)
2012-03-212013-02-14310170141
BIS
AlterationISSUED (renewal)
2011-08-032012-02-14320340886
BIS
Equipment work / Other / general constructionISSUED (initial)

Showing 12 of 20 records. The API and the source dataset have the full list.

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 3 active of 12

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
Active
V-DOB VIOLATION - ACTIVE
2025-12-08IMEGNCY-IMMEDIATE EMERGENCY ANYTHINGOPTIONALEXPOSURE #1 REQUIRES 30 LF OF SIDEWALK SHED AT THE ENTRANCE, AND 30 LF OF SHED AT EXPOSURE #4 (9TH STREET) SIDE OF THE BUILDING TO SAFEGUARD PUBLIC AND PROPERTY. SHED IS TO BE PLACED AGAINST BUILDINGV120825IMEGNCY19798
Active
V-DOB VIOLATION - ACTIVE
2025-12-04IMEGNCY-IMMEDIATE EMERGENCY ANYTHINGOPTIONALREQUESTING TO INSTALL PEDESTRIAN PROTECTION SIDEWALK SHED APPROXIMATELY 85 LINEAR FT AT EXPOSURE 1 (6TH AVENUE) TO WRAP AROUND TO EXPO 4 APPROXIMATELY 40 LINEAR FT ( 9 STREET), TO SAFEGUARD PUBLIC AND PROPERTYV120425IMEGNCY19798
Active
V-DOB VIOLATION - ACTIVE
1993-08-16LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIREDV081693LL629120603
Resolved/dismissed
V*-DOB VIOLATION - Resolved
2017-11-15E-ELEVATOR ELEVATORREQUIREDV*111517E9027/616695
Resolved/dismissed
V*-DOB VIOLATION - DISMISSED
2017-09-15EVCAT1-ELEVATOR ANNUAL INSPECTION / TEST ELEVATORREQUIREDVIOLATION ISSUED TO ELEVATOR-FAILURE TO FILE CATEGORY 1 2016 INSPECTION/TESTV*091517EVCAT104354
Resolved/dismissed
V*-DOB VIOLATION - Resolved
2015-07-06E-ELEVATOR ELEVATORREQUIREDV*070615E9027/545672
Resolved/dismissed
V*-DOB VIOLATION - DISMISSED
2014-10-31EVCAT1-ELEVATOR ANNUAL INSPECTION / TEST ELEVATORREQUIREDVIOLATION ISSUED TO ELEVATOR-FAILURE TO FILE CATEGORY 1 2013 INSPECTION/TESTV*103114EVCAT104179
Resolved/dismissed
V*-DOB VIOLATION - Resolved
2013-05-02E-ELEVATOR ELEVATORREQUIREDV*050213E9027/447335
Resolved/dismissed
V*-DOB VIOLATION - DISMISSED
2012-10-01EVCAT1-ELEVATOR ANNUAL INSPECTION / TEST ELEVATORREQUIREDVIOLATION ISSUED TO ELEVATOR-FAILURE TO FILE CATEGORY 1 2011 INSPECTION/TESTV*100112EVCAT102493
Resolved/dismissed
V*-DOB VIOLATION - DISMISSED
1998-05-04LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIREDV*050498LL629116600
Resolved/dismissed
V*-DOB VIOLATION - DISMISSED
1997-09-16LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIREDV*091697LL6291215727
Resolved/dismissed
V*-DOB VIOLATION - DISMISSED
1994-07-25LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIREDV*072594LL629101042

Source: DOB Violations — city dataset updated 2026-11-09; last loaded 2026-11-10

DOB safety violations (DOB NOW) 6 active of 6

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.

StatusIssuedTypeDeviceNumberRemarks
Active
Active
2025-10-31FTF-PL-PERGas Piping - LL152NOD-FTF-PL-PER-202212-0133385Cycle 1, Sub-cycle C (premises is in Community District 6)
Active
Active
2024-10-11FTC-VT-PER-COElevatorsVIO-FTC-VT-PER-202312-0015810Violation Issued-Failure To File 2023 Periodic Inspection Affirmation of Correction
Active
Active
2023-11-14FTC-BE-EXT-LPBoilerVIO-FTC-BE-EXT-202012-0001385Violation Issued-Failure To File 2020 External Inspection Affirmation of Correction for LP Device
Active
Active
2023-10-23FTC-VT-CAT1-COElevatorsVIO-FTC-VT-CAT1-202012-0000513Violation Issued-Failure To File 2020 Cat1 Test Affirmation of Correction
Active
Active
2023-10-23FTC-VT-CAT1-COElevatorsVIO-FTC-VT-CAT1-202112-0000140Violation Issued-Failure To File 2021 Cat1 Test Affirmation of Correction
Active
Active
2023-08-11FTF-VT-CAT1-COElevatorsVIO-FTF-VT-CAT1-202212-0003156Violation Issued-Failure To File 2022 Cat1 Test Report

Source: DOB Safety Violations (DOB NOW) — city dataset updated 2026-11-09; last loaded 2026-11-10

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 2026-11-07; last loaded 2026-11-10

OATH tickets (all agencies) 2 unpaid of 17

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
DEFAULTED · DEFAULTED
2025-05-14Dep - Bureau Of Env. CompliancIDLING OF MOTOR VEHICLE ENGINE MORE THAN THREE MINUTES 3RD AND SUBAMAZON LOGISTICS INC$2,000 / $0 / $2,200001017279L
Unpaid balance Default
DEFAULTED · DEFAULTED
2025-04-06Dep - Bureau Of Env. CompliancIDLING OF MOTOR VEHICLE ENGINE OVER 1MIN WHILE ADJACENT TO SCHOOL 2NDAMAZON LOGISTICS INC$1,500 / $0 / $1,650001014937K
Hearing pending
NEW ISSUANCE
2026-10-21Fire Department Of NycFIRE PROTECTION SYSTEMS:FAIL TO PREVENT UNNECESSARY UNWARRANTED ALARMSBROOKLYN PUBLIC LIBRARY$0 / $0 / $0012190061R
No balance due Default
PAID IN FULL · DEFAULTED
2025-11-26Fire Department Of NycFIRE PROTECTION SYSTEMS:FAIL TO PREVENT UNNECESSARY UNWARRANTED ALARMSBROOKLYN PUBLIC LIBRARY$1,000 / $1,000 / $0012174145Y
No balance due Default
PAID IN FULL · DEFAULTED
2025-02-19Dep - Bureau Of Env. CompliancIDLING OF MOTOR VEHICLE ENGINE MORE THAN THREE MINUTES 3RD AND SUBAMAZON LOGISTICS INC$2,000 / $2,628 / $0000934025N
No balance due Default
PAID IN FULL · DEFAULTED
2025-01-28Dep - Bureau Of Env. CompliancIDLING OF MOTOR VEHICLE ENGINE MORE THAN THREE MINUTES 1ST OFFAMAZON LOGISTICS INC$1,000 / $1,333 / $0000926882H
No balance due
PAID IN FULL · STIPULATED
2020-08-11Dep - Bureau Of Env. CompliancIDLING OF MOTOR VEHICLE ENGINE MORE THAN THREE MINUTES 1ST OFFRIVER STREET IDEALEASE$350 / $350 / $0000673346L
No balance due
PAID IN FULL · STIPULATED
2018-01-09Asbestos Control ProgramFAILURE TO USE MANOMETER TO DOCUMENT PRESSURE DIFFERENTIALTHE BROOKLYN PUBLIC LIBRARY$2,000 / $2,000 / $0050050608P
No balance due
PAID IN FULL · STIPULATED
2018-01-09Asbestos Control ProgramFAILURE TO USE MANOMETER TO DOCUMENT PRESSURE DIFFERENTIALTHE ASBESTOS CONTRACTOR INC.$2,000 / $2,000 / $0050050609R
No balance due
PAID IN FULL · IN VIOLATION
2009-09-16Dos - Enforcement AgentsILLEGAL POSTING OF HANDBILL NOTICEFRIENDS OF BILL DEBLASIO-2009$75 / $80 / —042012467N
No balance due
PAID IN FULL · IN VIOLATION
2009-09-16Dos - Enforcement AgentsILLEGAL POSTING OF HANDBILL NOTICEFRIENDS OF BILL DEBLASIO-2009$75 / $80 / —042012466L
No balance due
PAID IN FULL · IN VIOLATION
2009-03-26Sanitation DeptDOGS TO BE RESTRAINEDROEDEMEIER$200 / $200 / —041692352Z

Showing 12 of 17 records. The API and the source dataset have the full list.

Source: OATH Hearings Division Case Status — city dataset updated 2026-11-10; last loaded 2026-11-10

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 2026-11-10; last loaded 2026-11-10

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 2026-11-10; last loaded 2026-11-10

311 requests (last 12 months) 22

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
2026-11-06DEPNoise – AlarmIn Progress—
2026-09-24NYPDIllegal Parking – Posted Parking Sign ViolationClosed2026-09-24
2026-09-22DSNYAbandoned Bike – Chained to Public PropertyClosed2026-09-23
2026-09-19NYPDIllegal Parking – Posted Parking Sign ViolationClosed2026-09-20
2026-09-14NYPDIllegal Parking – Posted Parking Sign ViolationClosed2026-09-14
2026-08-24NYPDIllegal Parking – Posted Parking Sign ViolationClosed2026-08-24
2026-08-19DSNYAbandoned Bike – Chained to Public PropertyClosed2026-08-20
2026-08-16NYPDIllegal Parking – Posted Parking Sign ViolationClosed2026-08-16
2026-08-12DSNYAbandoned Bike – Chained to Public PropertyClosed2026-08-13
2026-06-24NYPDIllegal Parking – Posted Parking Sign ViolationClosed2026-06-24

Showing 10 of 22 records. The API and the source dataset have the full list.

Source: 311 Service Requests from 2020 to Present — city dataset updated 2026-11-10; last loaded 2026-11-10

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 Park Slope: Open HPD violations · Active DOB violations · Active ECB violations · Open DOB jobs · Unpaid OATH tickets

Closest on 6 Ave

Same tax block (1006), closest first

All properties on 6 Ave, Brooklyn · Brooklyn 11215

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