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Two family converted from one family
20 HANCOCK STREET
BROOKLYN · BIN 3057420
💬 Discuss this project
1899Year Built
3Stories
B3Building Class
R6BZoning
3,933 sfGross Floor Area
2Units
19 Open Violations 18 unresolved · 1 paperwork only ▸FDNY Report ↗
Two family converted from one family · Owner of record: 20 HANCOCK STREET HEIRLOOM LLC · 2,228 sf lot · 1.77 FAR built · Flood zone X
Locations of Work
ArchitectureStructuralElectricalMechanicalPlumbingFire ProtectionGeneral
Permit Issued — active, not yet Signed-off
RoofUnder Construction6p · 1 filing · 20 docs
Floor 3Under Construction31p · 2 filings · 20 docs
Floor 2Under Construction28p · 1 filing · 20 docs
Floor 1Under Construction31p · 1 filing · 20 docs
CellarUnder Construction23p · 2 filings · 20 docs
BasementUnder Construction28p · 2 filings · 20 docs
1 job · most recent 04/14/2026
Air Conditioning Systems Heating Systems
FiledStatusContractorScopeMake / Model / Capacity
04/14/2026Permit IssuedDONOVAN PETGRAVEAir Conditioning Systems, Heating Systems
Cooling
Fujitsu ASUH18LPAS 18,000 BTU · Heat Pump Outdoor ×4
ASUH24LPAS 24,000 BTU · Vrf Indoor ×4
Heating
Fujitsu ×20
1 job · most recent 03/23/2026
FiledStatusContractorScope
03/23/2026——39 heads
2 jobs · most recent 04/14/2026
Gas Water/Sanitary
FiledStatusContractorScope
04/14/2026Permit IssuedDEPENDABLE MECH CORPGas, Water/Sanitary
03/23/2026———
1 job · most recent 10/28/2025
General Wiring
FiledStatusContractorScope
10/28/2025Permit IssuedWCK ELECTRIC CORP.General Wiring
1 job · most recent 04/14/2026
Steel
FiledStatusContractorScope
04/14/2026Permit IssuedDEPENDABLE MECH CORPSteel
Building Lifecycle
All (10)Filed (6)Permit Issued (4)
04/28/2026
Permit issued — Plumbing
B01161203-S1-PL
04/14/2026
Filed — Alteration CO
Remove, cap, and seal existing gas meters, boiler, hot water heater, gas stove, and plumbing fixtures throughout the building . Proposed work includes installation of a washing machine and floor drain at the cellar; one (1) three-piece bathroom and one (1
B01161203-P2
03/23/2026
Filed — Alteration
Installation of the sprinkler system in conjunction with GC #B01161203.
B01367895-I1
02/05/2026
Permit issued — General Construction
B01161203-I1-GC
07/23/2025
Permit issued — General Construction
B01161203-I1-GC
07/21/2025
Permit issued — Structural
B01161203-S2-ST
05/20/2025
Filed — Alteration CO
Remove, cap, and seal existing gas meters, boiler, hot water heater, gas stove, and plumbing fixtures throughout the building . Proposed work includes installation of a washing machine and floor drain at the cellar; one (1) three-piece bathroom and one (1
B01161203-S3
05/19/2025
Filed — Alteration CO
Remove, cap, and seal existing gas meters, boiler, hot water heater, gas stove, and plumbing fixtures throughout the building . Proposed work includes installation of a washing machine and floor drain at the cellar; one (1) three-piece bathroom and one (1
B01161203-S2
03/14/2025
Filed — Alteration CO
Remove, cap, and seal existing gas meters, boiler, hot water heater, gas stove, and plumbing fixtures throughout the building . Proposed work includes installation of a washing machine and floor drain at the cellar; one (1) three-piece bathroom and one (1
B01161203-S1
01/31/2025
Filed — Alteration CO
Remove, cap, and seal existing gas meters, boiler, hot water heater, gas stove, and plumbing fixtures throughout the building . Proposed work includes installation of a washing machine and floor drain at the cellar; one (1) three-piece bathroom and one (1
B01161203-I1
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
20 HANCOCK STREET HEIRLOOM1608/29/2026
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
A M ENGINEERING SERVICES PC504/14/2026
ADVANCED ENGINEERING & INSPECTION,103/23/2026
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
AM ENGINEERING SERVICES603/21/2026
J SIBAJA KITCHEN VENTILATION203/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
DONOVAN PETGRAVEGeneral Contractor504/09/2026
A&H EXPRESS PLBG&HTG CORPPlumbing107/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
ALL STATE PROPERTY INSPEC4288504/14/2026
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWPlumbingPermit IssuedA&H EXPRESS PLBG&HTG CORP04/28/2026
DOB NOWGeneral ConstructionPermit IssuedDONOVAN PETGRAVE02/05/2026
DOB NOWGeneral ConstructionPermit IssuedDONOVAN PETGRAVE07/23/2025
DOB NOWStructuralPermit IssuedDONOVAN PETGRAVE07/21/2025
▾Special Inspection Requirements (DOB NOW) — 20
DateRequirementInspectorRole
05/28/2026Fire-Resistant Penetrations and JointsSEBERT DYERspecial
05/28/2026HVAC-R and service water piping design and insulation—energy_progress
05/18/2026HVAC-R and service water piping design and insulation—energy_progress
03/31/2026Fire-Resistant Penetrations and JointsSEBERT DYERspecial
04/29/2025Lighting controlsSEBERT DYERenergy_progress
04/29/2025Maintenance informationSEBERT DYERenergy_progress
04/29/2025Interior lighting powerSEBERT DYERenergy_progress
04/16/2025HVAC-R and service water heating equipmentSEBERT DYERenergy_progress
04/16/2025HVAC-R and service water piping design and insulationSEBERT DYERenergy_progress
04/16/2025HVAC-R and service water heating system controlsSEBERT DYERenergy_progress
04/16/2025FinalSEBERT DYERprogress
04/16/2025Mechanical SystemsSEBERT DYERspecial
02/19/2025Interior lighting powerSEBERT DYERenergy_progress
02/19/2025Lighting controlsSEBERT DYERenergy_progress
02/19/2025Lighting in dwelling unitsSEBERT DYERenergy_progress
02/19/2025MeteringSEBERT DYERenergy_progress
01/24/2025Structural Stability – Alterations of existing buildingsSEBERT DYERspecial
01/24/2025Fire-Resistance Rated ConstructionSEBERT DYERprogress
01/24/2025Fire-Resistant Penetrations and JointsSEBERT DYERspecial
01/24/2025Energy Code Compliance InspectionsSEBERT DYERprogress
▾Documents — 53 on file (BIS + DOB NOW)
▸Plans & Drawings7
▸DOB NOWPlans/Sketch7
08/21/2026B01161203-P1Request digital key ↗
08/21/2026B01161203-S2Request digital key ↗
08/21/2026B01161203-S1Request digital key ↗
Showing 3 of 7 on file for this type
▸Zoning, Tax Lot & Property Records2
▸DOB NOWHouse Number Verification: TOPO Stamp2
08/13/2026B01161203-P1Open ↗
08/13/2026B01161203-I1Open ↗
▸Seals & Professional Certifications33
▸DOB NOWProgress Inspector Seal & Signature19
08/30/2026B01161203-I1Open ↗
08/30/2026B01161203-I1Open ↗
08/30/2026B01161203-I1Open ↗
Showing 3 of 19 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature7
08/30/2026B01161203-I1Open ↗
08/30/2026B01161203-I1Open ↗
08/29/2026B01161203-S1Open ↗
Showing 3 of 7 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature7
08/21/2026B01161203-S2Open ↗
08/21/2026B01161203-P2Open ↗
08/21/2026B01161203-P1Open ↗
Showing 3 of 7 on file for this type
▸Safety & Tenant Protection2
▸DOB NOWStreet Tree Checklist2
08/21/2026B01161203-P1Open ↗
08/15/2026B01161203-I1Open ↗
▸Environmental & Asbestos7
▸DOB NOWDEP ACP-5: Asbestos Assessment Report7
08/21/2026B01161203-P1Open ↗
08/21/2026B01161203-S2Open ↗
08/21/2026B01161203-S1Open ↗
Showing 3 of 7 on file for this type
▸Other Documents2
▸DOB NOWProperty Ownership Certification2
08/21/2026B01161203-P1Open ↗
08/15/2026B01161203-I1Open ↗