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Walk-up apt, over six families with stores
8421 20TH AVENUE
BROOKLYN · Bensonhurst · BIN 3165375
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1925Year Built
4Stories
C7Building Class
R5Zoning
32,600 sfGross Floor Area
42Units
LL97 CoveredRent Stabilized12 Active Violations ▸FDNY Report ↗
Walk-up apt, over six families with stores · Owner of record: 2009 Property Group · 11,400 sf lot · 2.86 FAR built · Flood zone X
Locations of Work
ArchitectureStructuralMechanicalPlumbing
Names shown beside floors are taken automatically from the text of filed documents and may be incomplete or wrong.
RoofDun Huang 20 Ave5p · 1 filing · 18 docs
Floor 1Dun Huang 20 Ave19p · 5 filings · 20 docs
CellarDun Huang 20 Ave5p · 1 filing · 11 docs
Site & exteriorDun Huang 20 Ave7p · 2 filings · 20 docs
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
Dun Huang 20 Ave2503/22/2026
2009 Property Group103/22/2026
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
MSM Engineering Services801/25/2024
J&R Design and Inspection202/14/2022
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
Highquality Construction VNW403/21/2026
Modern Building Consultant803/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
Universal ConstructionGeneral Contractor403/21/2026
AMC Plumbing, Heating & CLNGPlumbing207/08/2026
E D ElectricalElectrical103/22/2026
High Quality ConstructionGeneral Contractor107/08/2026
American Standard P&H CororpPlumbing107/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
MSM Engineering Services8449801/25/2024
J&R Design and Inspection6637202/14/2022
Building Lifecycle
All (117)Filed (10)Permit Issued (6)Signed Off (5)Violation (60)Inspection (6)Special Inspection (30)
03/25/2026
Violation issued (HPD, closed)
C
03/25/2026
Violation issued (HPD, closed)
C
03/18/2026
Violation issued (HPD, closed)
C
03/18/2026
Violation issued (HPD, closed)
B
03/18/2026
Violation issued (HPD, closed)
B
01/12/2026
Violation issued (HPD, closed)
B
01/12/2026
Violation issued (HPD, closed)
B
12/22/2025
Violation issued (HPD, closed)
C
12/22/2025
Violation issued (HPD, closed)
C
12/22/2025
Violation issued (HPD, closed)
A
12/22/2025
Violation issued (HPD, closed)
C
12/22/2025
Violation issued (HPD, closed)
C
12/22/2025
Violation issued (HPD, closed)
A
12/22/2025
Violation issued (HPD, closed)
C
12/22/2025
Violation issued (HPD, closed)
C
12/22/2025
Violation issued (HPD, closed)
A
12/12/2025
Violation issued (HPD, open)
B
12/12/2025
Violation issued (HPD, open)
B
12/12/2025
Violation issued (HPD, closed)
B
12/12/2025
Violation issued (HPD, open)
B
12/12/2025
Violation issued (HPD, closed)
B
12/02/2025
Violation issued (HPD, closed)
C
12/02/2025
Violation issued (HPD, closed)
A
12/02/2025
Violation issued (HPD, closed)
A
12/02/2025
Violation issued (HPD, closed)
C
12/02/2025
Violation issued (HPD, closed)
B
12/02/2025
Violation issued (HPD, closed)
C
12/02/2025
Violation issued (HPD, closed)
B
12/02/2025
Violation issued (HPD, closed)
B
12/02/2025
Violation issued (HPD, open)
A
12/02/2025
Violation issued (HPD, closed)
C
12/02/2025
Violation issued (HPD, closed)
B
12/02/2025
Violation issued (HPD, closed)
C
12/02/2025
Violation issued (HPD, closed)
B
12/02/2025
Violation issued (HPD, closed)
C
12/02/2025
Violation issued (HPD, closed)
C
12/02/2025
Violation issued (HPD, open)
A
12/02/2025
Violation issued (HPD, closed)
C
12/02/2025
Violation issued (HPD, closed)
C
12/02/2025
Violation issued (HPD, closed)
A
12/02/2025
Violation issued (HPD, closed)
A
12/02/2025
Violation issued (HPD, closed)
C
11/24/2025
Violation issued (HPD, open)
B
11/24/2025
Violation issued (HPD, open)
B
11/24/2025
Violation issued (HPD, closed)
B
11/24/2025
Violation issued (HPD, closed)
B
11/24/2025
Violation issued (HPD, closed)
B
11/24/2025
Violation issued (HPD, closed)
B
11/24/2025
Violation issued (HPD, open)
B
11/24/2025
Violation issued (HPD, closed)
B
11/24/2025
Violation issued (HPD, open)
B
11/24/2025
Violation issued (HPD, closed)
B
11/24/2025
Violation issued (HPD, open)
B
09/26/2025
Violation issued (HPD, open)
C
09/26/2025
Violation issued (HPD, closed)
C
09/26/2025
Violation issued (HPD, open)
C
09/17/2025
Violation issued (HPD, closed)
A
09/17/2025
Violation issued (HPD, closed)
A
09/17/2025
Violation issued (HPD, closed)
C
09/17/2025
Violation issued (HPD, closed)
A
Latest 60 of 117 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWPlumbingSigned-offAMC Plumbing, Heating & CLNG11/29/2022
DOB NOWMechanical SystemsSigned-offUniversal Construction11/03/2022
DOB NOWPlumbingSigned-offAMC Plumbing, Heating & CLNG10/21/2022
DOB NOWGeneral ConstructionSigned-offUniversal Construction10/20/2022
DOB NOWGeneral ConstructionSigned-offHigh Quality Construction02/18/2022
DOB NOWPlumbingSigned-offAmerican Standard P&H Cororp02/18/2022
BISOTISSUEDAbied Construction02/06/2018
BISFPISSUEDIdeal Fire Control06/01/2001
BISBLISSUEDVito Valentini10/20/1998
BISFSISSUEDVito Valentini10/20/1998
BISOTISSUEDElvera Service07/22/1998
1 project · most recent 03/08/2022
General Wiring
FiledStatusContractorScope
03/08/2022CompleteE D ElectricalGeneral Wiring
▾Field Inspections (DOB CAP) — 6
DateTypeResultReport
04/06/2023Certified Water and Sanitary-WS-Fixtures-FinishCertifiedView ↗
02/02/2023Pass-Final PL - Up to 3 Requested FloorsPassView ↗
01/13/2023Fail-Final PL - Up to 3 Requested FloorsFailView ↗
11/14/2022Certified Water and Sanitary-WS-Sanitary Piping-RoughingCertifiedView ↗
04/27/2022Certified Water and Sanitary-WS-Fixtures-FinishCertifiedView ↗
04/06/2022Certified Water and Sanitary-WS-Sanitary Piping-RoughingCertifiedView ↗
▾Special Inspection Requirements (DOB NOW) — 44
DateRequirementInspectorRole
01/26/2024Maintenance informationMOHAMED MAHMOUDenergy_progress
01/26/2024Duct leakage testing, insulation and designMOHAMED MAHMOUDenergy_progress
01/26/2024Fire-Resistant Penetrations and JointsMOHAMED MAHMOUDspecial
01/26/2024Mechanical SystemsMOHAMED MAHMOUDspecial
01/26/2024Energy Code Compliance InspectionsMOHAMED MAHMOUDprogress
01/26/2024Fire-Resistance Rated ConstructionMOHAMED MAHMOUDprogress
01/26/2024FinalMOHAMED MAHMOUDprogress
01/26/2024Ventilation and air distribution systemMOHAMED MAHMOUDenergy_progress
01/25/2024Ventilation and air distribution systemMOHAMED MAHMOUDenergy_progress
01/25/2024Fire-Resistant Penetrations and JointsMOHAMED MAHMOUDspecial
01/25/2024Mechanical SystemsMOHAMED MAHMOUDspecial
01/25/2024Energy Code Compliance InspectionsMOHAMED MAHMOUDprogress
01/25/2024FinalMOHAMED MAHMOUDprogress
01/25/2024Fire-Resistance Rated ConstructionMOHAMED MAHMOUDprogress
01/25/2024Maintenance informationMOHAMED MAHMOUDenergy_progress
01/25/2024Duct leakage testing, insulation and designMOHAMED MAHMOUDenergy_progress
02/10/2023Duct leakage testing, insulation and designMOHAMED MAHMOUDenergy_progress
02/10/2023Fire-Resistant Penetrations and JointsMOHAMED MAHMOUDspecial
02/10/2023Mechanical SystemsMOHAMED MAHMOUDspecial
02/10/2023Energy Code Compliance InspectionsMOHAMED MAHMOUDprogress
02/10/2023FinalMOHAMED MAHMOUDprogress
02/10/2023Fire-Resistance Rated ConstructionMOHAMED MAHMOUDprogress
02/10/2023Maintenance informationMOHAMED MAHMOUDenergy_progress
02/10/2023Ventilation and air distribution systemMOHAMED MAHMOUDenergy_progress
01/17/2023Fire-Resistant Penetrations and JointsMOHAMED MAHMOUDspecial
Latest 25 of 44.
▾Tenants in the building
TenantSpaceFloorsRenovation projects
Dun Huang 20 AveRestaurant / Food ServiceCellar, Floor 1, Roof
Project B08019213 Alteration · LOC Issued · 10/25/2022
Project B08019161 Alteration · LOC Issued · 10/11/2022
Names are taken automatically from the text of each project’s filed documents (title blocks and cover sheets) and screened to exclude owners, landlords and designers. They may be incomplete or wrong; check the filing.
▾Documents — 110 on file (BIS + DOB NOW)
▸Plans & Drawings10
▸DOB NOWPlans/Sketch10
08/31/2026B00676821-I1Request digital key ↗
08/31/2026B00676811-I1Request digital key ↗
08/28/2026B08019161-I1Request digital key ↗
Showing 3 of 10 on file for this type
▸Applications & Permits12
▸BISPLAN / WORK APPROVAL APPLICATION9
02/05/2024321647205Open ↗
01/09/2024321647205Open ↗
11/24/2023301175341Open ↗
Showing 3 of 9 on file for this type
▸BISWORK PERMIT APPLICATION2
02/06/2018321707578Open ↗
09/22/2017321647205Open ↗
▸BISPLAN - WORK & PERMITS - SUPPPORTING DOCUMENTATION1
09/03/2019321707578Open ↗
▸Seals & Professional Certifications39
▸DOB NOWProgress Inspector Seal & Signature12
09/23/2026B08019213-P1Open ↗
09/23/2026B08019213-P1Open ↗
09/07/2026B08019083-P1Open ↗
Showing 3 of 12 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature10
08/31/2026B00676821-I1Open ↗
08/31/2026B00676811-I1Open ↗
08/28/2026B08019161-I1Open ↗
Showing 3 of 10 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature7
09/23/2026B08019213-P1Open ↗
09/07/2026B08019083-P1Open ↗
08/25/2026B00676811-I1Open ↗
Showing 3 of 7 on file for this type
▸BISTECHNICAL REPORT: RESPONSIBILITY/CERTIFICATION6
02/22/2020321647205Open ↗
10/07/2019321707578Open ↗
10/24/2018321707578Open ↗
Showing 3 of 6 on file for this type
▸BISPROFESSIONAL CERTIFICATION STATEMENT2
02/06/2018321707578Open ↗
09/22/2017321647205Open ↗
▸BISPROFESSIONAL CERTIFIED CHECKLIST2
02/06/2018321707578Open ↗
09/22/2017321647205Open ↗
▸Safety & Tenant Protection2
▸BISTenant Protection Plan and Notes2
02/06/2018321707578Open ↗
02/16/2024321647205Open ↗
▸Environmental & Asbestos12
▸DOB NOWDEP ACP-5: Asbestos Assessment Report10
08/31/2026B00676821-I1Open ↗
08/31/2026B00676811-I1Open ↗
08/28/2026B08019161-P1Open ↗
Showing 3 of 10 on file for this type
▸BISTHIS IS 'NOT AN ASBESTOS PROJECT'1
06/09/2008310153366Open ↗
▸BISASBESTOS: CERTIFICATION (DEP ACP5)1
09/22/2017321647205Open ↗
▸Energy Compliance15
▸BISTECHNICAL REPORT: ENERGY CODE PROGRESS INSPS5
02/22/2020321647205Open ↗
10/07/2019321707578Open ↗
10/24/2018321707578Open ↗
Showing 3 of 5 on file for this type
▸BISTECHNICAL REPORT: ENERGY CODE - RESPONSIBILITY4
02/15/2024321647205Open ↗
11/08/2023321647205Open ↗
02/23/2023321647205Open ↗
Showing 3 of 4 on file for this type
▸BISINSULATION PLACEMENT & R VALUES1
12/07/2023321647205Open ↗
▸BISENERGY CODE COMPLIANCE INSPECTIONS1
12/07/2023321647205Open ↗
▸BISAIR SEALING AND INSULATION - VISUAL1
12/07/2023321647205Open ↗
▸BISAS-BUILT ENERGY ANALYSIS1
11/26/2021321707578Open ↗
▸BISAS-BUILT ENERGY ANALYSIS (EN2)1
12/07/2023321647205Open ↗
▸DOB NOWEN2: As Built Energy Analysis1
08/31/2026B00676811-I1Open ↗
▸Inspections & Test Reports6
▸BISTECHNICAL REPORT: RESPONSIBILITY5
02/15/2024321647205Open ↗
11/08/2023321647205Open ↗
02/23/2023321647205Open ↗
Showing 3 of 5 on file for this type
▸BISFIRE-RESISTANT PENETRATIONS AND JOINTS (FIRESTOP)1
12/07/2023321647205Open ↗
▸Approvals, Objections & Sign-offs5
▸BISCERTIFICATE OF OCCUPANCY/LOC: REQUEST2
02/16/2024321647205Open ↗
01/19/2022321707578Open ↗
▸BISFINAL1
12/07/2023321647205Open ↗
▸BISADMINISTRATIVE OBJECTIONS1
06/09/2008310153366Open ↗
▸BISLETTERS - SUPPORTING DOCUMENTATION1
11/24/2023301175341Open ↗
▸Cost, Insurance & Ownership4
▸BISCOST AFFIDAVIT3
11/26/2021321707578Open ↗
02/06/2018321707578Open ↗
09/22/2017321647205Open ↗
▸BISCOST AFFIDAVIT (FINAL): PW31
12/07/2023321647205Open ↗
▸Filing & Intake Forms4
▸BISEFILING COVER SHEET3
02/07/2018321707578Open ↗
09/25/2017321647205Open ↗
06/09/2008310153366Open ↗
▸BISADDITIONAL INFORMATION1
10/07/2019321707578Open ↗
▸Other Documents1
▸BISMAINTENANCE INFORMATION1
12/07/2023321647205Open ↗