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Single or multiple dwelling with stores or offices
4321 CHURCH AVENUE
BROOKLYN · BIN 3109074
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1931Year Built
3Stories
S9Building Class
R5Zoning
4,860 sfGross Floor Area
6Units
Rent Stabilized3 Open Violations 1 unresolved · 2 paperwork only ▸FDNY Report ↗
Single or multiple dwelling with stores or offices · Owner of record: 4321 CHURCH AVE LLC · 1,800 sf lot · 2.7 FAR built · Flood zone X
Locations of Work
ArchitectureMechanical
Roof1p · 1 filing · 6 docs
Floor 11p · 1 filing · 8 docs
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
855 MORRIS PARK607/08/2026
4321 CHURCH AVE LLC103/22/2026
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
07/25/2024$1.2M—— → —$247/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
POLY ENGINEER PC203/11/2026
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
AN TONG FAN403/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
CT IDEAL SUPPRESSIONGeneral Contractor207/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
POLY ENGINEER, P.C.6110203/11/2026
Building Lifecycle
All (89)Filed (2)Permit Issued (2)Signed Off (1)Violation (60)Objection (16)Special Inspection (8)
09/09/2026
Signed off — Alteration
INTERIOR RENOVATION OF EXISTING DELI STORE INCLUDING NEW PAINT, MINOR PARTITION WORK AND FLOOR TILE, NO CHANGE OF USE, EGRESS, OR OCCUPANCY UNDER THIS APPLICATION.
B01263340-I1
05/04/2026
Violation issued (HPD, closed)
A
04/28/2026
Permit issued — Mechanical Systems
B01263336-I1-MS
04/10/2026
Permit issued — General Construction
B01263340-I1-GC
03/11/2026
Filed — Alteration
INSTALL A NEW COMMERCIAL KITCHEN EXHAUST HOOD, DUCTWORK AT KITCHEN AND EXHAUST FAN ON THE ROOF, FIRE SUPPRESSION SYSTEM IS DONE BY OTHERS, THERE IS NO CHANGE IN USE, OCCUPANCY OR EGRESS UNDER THIS APPLICATION.
B01263336-I1
03/11/2026
Special inspection requirement — Tenant Protection Plan Compliance
De Gao
03/10/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
De Gao
02/23/2026
Objection resolved — Addressed
02/16/2026
Objection resolved — Addressed
12/02/2025
Objection resolved — Addressed
11/23/2025
Objection resolved — Addressed
10/05/2025
Objection resolved — Addressed
10/05/2025
Objection resolved — Addressed
10/05/2025
Objection resolved — Addressed
10/05/2025
Objection resolved — Addressed
09/09/2025
Objection raised — Fire_Protection
09/09/2025
Objection raised — Fire_Protection
09/09/2025
Objection raised — Fire_Protection
09/09/2025
Objection raised — Admin
09/09/2025
Objection raised — Fire_Protection
09/09/2025
Objection raised — Energy
09/09/2025
Objection raised — Fire_Protection
09/09/2025
Objection raised — Scope
08/26/2025
Filed — Alteration
INTERIOR RENOVATION OF EXISTING DELI STORE INCLUDING NEW PAINT, MINOR PARTITION WORK AND FLOOR TILE, NO CHANGE OF USE, EGRESS, OR OCCUPANCY UNDER THIS APPLICATION.
B01263340-I1
08/26/2025
Special inspection requirement — Final
De Gao
08/26/2025
Special inspection requirement — Fire-Resistant Penetrations and Joints
De Gao
08/26/2025
Special inspection requirement — Structural Stability – Alterations of existing buildings
De Gao
08/26/2025
Special inspection requirement — Tenant Protection Plan Compliance
De Gao
07/29/2025
Special inspection requirement — Final
De Gao
07/29/2025
Special inspection requirement — Mechanical Systems
De Gao
06/09/2025
Violation issued (HPD, closed)
A
03/12/2025
Violation issued (ECB, closed)
Construction
02/12/2025
Violation issued (FDNY_ORDER, closed)
02/12/2025
Violation issued (FDNY_ORDER, closed)
09/23/2024
Violation issued (DOB, closed)
V*-DOB VIOLATION - DISMISSED
08/29/2024
Violation issued (HPD, closed)
C
08/29/2024
Violation issued (HPD, closed)
B
08/29/2024
Violation issued (HPD, closed)
B
08/29/2024
Violation issued (HPD, closed)
B
08/29/2024
Violation issued (HPD, closed)
C
08/29/2024
Violation issued (HPD, closed)
B
08/22/2024
Violation issued (HPD, closed)
C
08/22/2024
Violation issued (HPD, closed)
C
04/20/2024
Violation issued (HPD, closed)
B
04/20/2024
Violation issued (HPD, closed)
B
04/20/2024
Violation issued (HPD, closed)
B
04/09/2024
Violation issued (HPD, closed)
A
11/29/2023
Violation issued (HPD, closed)
B
11/29/2023
Violation issued (HPD, closed)
B
11/29/2023
Violation issued (HPD, closed)
B
11/29/2023
Violation issued (HPD, closed)
B
11/29/2023
Violation issued (HPD, closed)
B
11/29/2023
Violation issued (HPD, closed)
B
11/29/2023
Violation issued (HPD, closed)
C
11/29/2023
Violation issued (HPD, closed)
B
11/29/2023
Violation issued (HPD, closed)
A
11/26/2023
Violation issued (HPD, closed)
C
11/26/2023
Violation issued (HPD, closed)
B
11/26/2023
Violation issued (HPD, closed)
C
11/26/2023
Violation issued (HPD, closed)
C
Latest 60 of 89 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWMechanical SystemsSigned-offCT IDEAL SUPPRESSION04/28/2026
DOB NOWGeneral ConstructionSigned-offCT IDEAL SUPPRESSION04/10/2026
1 project · most recent 03/11/2026
Ventilation Systems
FiledStatusContractorScopeMake / Model / Capacity
03/11/2026Signed-offCT IDEAL SUPPRESSIONVentilation Systems
Ventilation
Captiveaire NCA16FA 2,400 CFM · Exhaust Fan ×1
▾Special Inspection Requirements (DOB NOW) — 8
DateRequirementInspectorRole
03/11/2026Tenant Protection Plan ComplianceDe Gaospecial
03/10/2026Fire-Resistant Penetrations and JointsDe Gaospecial
08/26/2025FinalDe Gaoprogress
08/26/2025Fire-Resistant Penetrations and JointsDe Gaospecial
08/26/2025Structural Stability – Alterations of existing buildingsDe Gaospecial
08/26/2025Tenant Protection Plan ComplianceDe Gaospecial
07/29/2025FinalDe Gaoprogress
07/29/2025Mechanical SystemsDe Gaospecial
▾Documents — 13 on file (BIS + DOB NOW)
▸Plans & Drawings1
▸DOB NOWPlans/Sketch1
08/20/2026B01263340-I1Request digital key ↗
▸Seals & Professional Certifications10
▸DOB NOWSpecial Inspector Seal & Signature6
08/27/2026B01263340-I1Open ↗
08/27/2026B01263340-I1Open ↗
08/27/2026B01263340-I1Open ↗
Showing 3 of 6 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature2
08/20/2026B01263340-I1Open ↗
08/13/2026B01263336-I1Open ↗
▸DOB NOWProgress Inspector Seal & Signature2
08/27/2026B01263340-I1Open ↗
08/25/2026B01263336-I1Open ↗
▸Environmental & Asbestos2
▸DOB NOWDEP ACP-5: Asbestos Assessment Report2
08/20/2026B01263340-I1Open ↗
08/13/2026B01263336-I1Open ↗