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Two family converted from one family
325 21 STREET
BROOKLYN · BIN 3017474
💬 Discuss this project
1905Year Built
2Stories
B3Building Class
R6BZoning
1,208 sfGross Floor Area
2Units
2 Open Violations 1 unresolved · 1 paperwork only ▸FDNY Report ↗
Two family converted from one family · Owner of record: 325 21ST ST LLC · 1,594 sf lot · 0.76 FAR built · Flood zone X
Locations of Work
ArchitectureMechanicalFire Protection
Permit Issued — active, not yet Signed-off
RoofUnder Construction35p · 1 filing · 20 docs
Floor 2Under Construction38p · 1 filing · 20 docs
Floor 1Under Construction38p · 1 filing · 20 docs
CellarUnder Construction36p · 1 filing · 20 docs
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
INTERBORO PROPERTY MANAGEMENT3207/08/2026
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
10/02/2024$1.2M—SOUTH SLOPE CAPITAL PARTNERS LLC → 325 21ST ST LLC$993/sf building
02/17/2022$1.1M—— → —$877/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
DEVOTE ARCH & DESIGN STUDIO, PLLC1008/04/2026
CAREY NGAI CONSULTING ENGINEER205/30/2025
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
QUICK FILING OF NY INC803/21/2026
RAYMOND HO ARCHITECT203/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
INTERBORO PROPERTY MGMTGeneral Contractor1007/08/2026
J. CAIAZZO PLBG & HTG CORPFire Protection106/28/2026
AMC PLBG, HTG & CLNG, INCPlumbing107/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
JOADEM CORPORATION4350908/04/2026
RAYMOND HO ARCHITECT, PLL1654101/07/2026
Building Lifecycle
All (135)Filed (12)Permit Issued (11)Signed Off (7)Violation (5)Inspection (7)Objection (80)Special Inspection (13)
08/25/2026
Signed off — Alteration CO
Plumbing work as per plans
B01046970-S5
08/20/2026
Signed off — Alteration CO
Plumbing work as per plans
B01046970-S1
08/20/2026
Signed off — Alteration CO
Plumbing work as per plans
B01046970-S4
08/04/2026
Filed — Alteration CO
Plumbing work as per plans
B01046970-P3
07/22/2026
Signed off — Alteration CO
Plumbing work as per plans
B01046970-S3
07/20/2026
Inspection — Pass-Final CND-Occupancy Inspection
Pass
View inspection ↗
07/17/2026
Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Roughing
Certified
View inspection ↗
07/01/2026
Objection resolved — Addressed
06/19/2026
Signed off — Alteration CO
Plumbing work as per plans
B01046970-S2
06/16/2026
Signed off — Alteration
interior demolition of 2 family as per plans
B01131975-I1
06/16/2026
Signed off — Alteration
installation of construction fence
B01131956-I1
06/09/2026
Objection resolved — Addressed
06/09/2026
Objection resolved — Addressed
06/04/2026
Permit issued — General Construction
B01046970-I1-GC
05/22/2026
Objection resolved — Addressed
05/21/2026
Objection resolved — Addressed
05/21/2026
Objection resolved — Addressed
05/20/2026
Objection raised — Scope
05/20/2026
Objection raised — Zoning
05/20/2026
Objection raised — Fire_Protection
05/20/2026
Objection raised — Other
05/20/2026
Objection raised — Fire_Protection
05/20/2026
Objection raised — Fire_Protection
05/08/2026
Permit issued — Mechanical Systems
B01046970-S5-MS
04/30/2026
Filed — Alteration CO
Plumbing work as per plans
B01046970-P2
03/26/2026
Filed — Alteration CO
Plumbing work as per plans
B01046970-S5
03/05/2026
Filed — Alteration CO
Plumbing work as per plans
B01046970-P1
02/12/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
OLULADE ADEMOKUN
02/12/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
OLULADE ADEMOKUN
02/12/2026
Special inspection requirement — Interior lighting power
OLULADE ADEMOKUN
01/28/2026
Permit issued — Sprinklers
B01046970-S4-EW-SP
01/07/2026
Filed — Alteration CO
Plumbing work as per plans
B01046970-S4
11/10/2025
Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Underground
Certified
View inspection ↗
11/03/2025
Permit issued — Construction Fence
B01131956-I1-FN
11/03/2025
Permit issued — General Construction
B01131975-I1-GC
10/23/2025
Permit issued — Plumbing
B01046970-S2-PL
10/20/2025
Filed — Alteration CO
Plumbing work as per plans
B01046970-S2
09/29/2025
Inspection — Pass-Final CND-Occupancy Inspection
Pass
View inspection ↗
09/12/2025
Inspection — Pass-Final CND-Occupancy Inspection
Pass
View inspection ↗
08/28/2025
Inspection — Pass-Final CND-Occupancy Inspection
Pass
View inspection ↗
08/27/2025
Inspection — Pass-Final CND-Occupancy Inspection
Pass
View inspection ↗
08/11/2025
Permit issued — Foundation
B01046970-S3-FO
07/28/2025
Permit issued — General Construction
B01046970-I1-GC
07/23/2025
Permit issued — Structural
B01046970-S1-ST
07/03/2025
Objection resolved — Addressed
06/18/2025
Objection resolved — Addressed
06/18/2025
Objection resolved — Addressed
06/18/2025
Objection resolved — Addressed
06/18/2025
Objection resolved — Addressed
06/18/2025
Objection resolved — Addressed
06/18/2025
Objection resolved — Addressed
06/18/2025
Objection resolved — Addressed
06/18/2025
Objection resolved — Addressed
06/18/2025
Objection resolved — Addressed
06/18/2025
Objection resolved — Addressed
06/06/2025
Objection raised — Structural
06/06/2025
Objection raised — Admin
06/06/2025
Objection raised — Structural
06/06/2025
Objection raised — Structural
06/06/2025
Objection raised — Structural
Latest 60 of 135 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWGeneral ConstructionPermit IssuedINTERBORO PROPERTY MGMT06/04/2026
DOB NOWMechanical SystemsSigned-offINTERBORO PROPERTY MGMT05/08/2026
DOB NOWSprinklersSigned-offANTHONY CAIAZZO01/28/2026
DOB NOWConstruction FenceSigned-offINTERBORO PROPERTY MGMT11/03/2025
DOB NOWGeneral ConstructionSigned-offINTERBORO PROPERTY MGMT11/03/2025
DOB NOWPlumbingSigned-offAMC PLBG, HTG & CLNG, INC10/23/2025
DOB NOWFoundationSigned-offINTERBORO PROPERTY MGMT08/11/2025
DOB NOWGeneral ConstructionPermit IssuedINTERBORO PROPERTY MGMT07/28/2025
DOB NOWStructuralSigned-offINTERBORO PROPERTY MGMT07/23/2025
DOB NOWGeneral ConstructionSigned-offINTERBORO PROPERTY MGMT11/13/2024
DOB NOWConstruction FenceSigned-offINTERBORO PROPERTY MGMT11/13/2024
1 job · most recent 08/04/2026
Heating and Air Conditioning Systems
FiledStatusContractorScopeMake / Model / Capacity
08/04/2026Permit IssuedINTERBORO PROPERTY MGMTHeating and Air Conditioning Systems
Heat / Cool
Mitsubishi Electric Mitsubishi MXZ-SM36NLHZ 42,000 BTU · Vrf Outdoor ×1
Mitsubishi MXZ-SM48NLHZ 54,000 BTU · Vrf Outdoor ×1
1 job · most recent 08/04/2026
Sprinkler System
FiledStatusContractorScope
08/04/2026Signed-offJ. CAIAZZO PLBG & HTG CORSprinkler System
1 job · most recent 08/04/2026
Gas Water/Sanitary
FiledStatusContractorScope
08/04/2026Signed-offACTION&A1 PLBG AND HTG COGas, Water/Sanitary
1 job · most recent 03/18/2026
General Wiring
FiledStatusContractorScope
03/18/2026CompleteRIGID ELECTRIC, INC.General Wiring
1 job · most recent 08/04/2026
Wood
FiledStatusContractorScope
08/04/2026Permit IssuedINTERBORO PROPERTY MGMTWood
1 job · most recent 10/31/2024
Fence
FiledStatusContractorScope
10/31/2024Signed-offINTERBORO PROPERTY MGMTFence
▾Field Inspections (DOB CAP) — 7
DateTypeResultReport
07/20/2026Pass-Final CND-Occupancy InspectionPassView ↗
07/17/2026Certified Water and Sanitary-WS-Sanitary Piping-RoughingCertifiedView ↗
11/10/2025Certified Water and Sanitary-WS-Sanitary Piping-UndergroundCertifiedView ↗
09/29/2025Pass-Final CND-Occupancy InspectionPassView ↗
09/12/2025Pass-Final CND-Occupancy InspectionPassView ↗
08/28/2025Pass-Final CND-Occupancy InspectionPassView ↗
08/27/2025Pass-Final CND-Occupancy InspectionPassView ↗
▾Special Inspection Requirements (DOB NOW) — 13
DateRequirementInspectorRole
02/12/2026Fire-Resistant Penetrations and JointsOLULADE ADEMOKUNspecial
02/12/2026Structural Stability – Alterations of existing buildingsOLULADE ADEMOKUNspecial
02/12/2026Interior lighting powerOLULADE ADEMOKUNenergy_progress
04/10/2025Sprinkler SystemsPING MAN HOspecial
02/12/2025Structural Wood FrameOLULADE ADEMOKUNprogress
02/12/2025Post-installed AnchorsOLULADE ADEMOKUNspecial
02/12/2025Construction Operations Influencing Adjacent StructuresOLULADE ADEMOKUNspecial
02/12/2025DemolitionOLULADE ADEMOKUNspecial
02/12/2025Structural Stability – Alterations of existing buildingsOLULADE ADEMOKUNspecial
02/03/2025Structural Cold-Formed SteelOLULADE ADEMOKUNspecial
12/19/2024FinalCarey Ngaiprogress
11/08/2024FinalPING MAN HOprogress
11/08/2024FinalPING MAN HOprogress
▾Documents — 74 on file (BIS + DOB NOW)
▸Plans & Drawings12
▸DOB NOWPlans/Sketch12
08/23/2026B01131956-I1Request digital key ↗
08/23/2026B01131975-P1Request digital key ↗
08/23/2026B01131975-I1Request digital key ↗
Showing 3 of 12 on file for this type
▸Zoning, Tax Lot & Property Records8
▸DOB NOWZD1: DOB Zoning Diagram3
08/17/2026B01046970-P3Open ↗
08/13/2026B01046970-P2Open ↗
08/13/2026B01046970-I1Open ↗
▸DOB NOWZoning Exhibit form (1-5)3
08/17/2026B01046970-P3Open ↗
08/13/2026B01046970-P2Open ↗
08/13/2026B01046970-I1Open ↗
▸DOB NOWHouse Number Verification: TOPO Stamp2
08/13/2026B01046970-P2Open ↗
08/13/2026B01046970-I1Open ↗
▸Seals & Professional Certifications25
▸DOB NOWDPL-1: Design Professional Seal & Signature12
08/23/2026B01131956-I1Open ↗
08/23/2026B01131975-I1Open ↗
08/17/2026B01046970-I1Open ↗
Showing 3 of 12 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature8
09/23/2026B01046970-S4Open ↗
08/29/2026B01046970-S1Open ↗
08/29/2026B01046970-S1Open ↗
Showing 3 of 8 on file for this type
▸DOB NOWProgress Inspector Seal & Signature5
08/29/2026B01046970-S1Open ↗
08/29/2026B01046970-S1Open ↗
08/24/2026B01131975-I1Open ↗
Showing 3 of 5 on file for this type
▸Safety & Tenant Protection3
▸DOB NOWStreet Tree Checklist3
08/17/2026B01046970-P3Open ↗
08/13/2026B01046970-P2Open ↗
08/13/2026B01046970-I1Open ↗
▸Environmental & Asbestos11
▸DOB NOWDEP ACP-5: Asbestos Assessment Report11
08/23/2026B01131975-I1Open ↗
08/17/2026B01046970-I1Open ↗
08/17/2026B01046970-S5Open ↗
Showing 3 of 11 on file for this type
▸Inspections & Test Reports1
▸DOB NOWGeotechnical Report (BC 1803.6)1
08/13/2026B01046970-S3Open ↗
▸Other Documents14
▸DOB NOWPlot Diagram4
08/17/2026B01046970-P3Open ↗
08/13/2026B01046970-I1Open ↗
08/13/2026B01046970-P2Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWSite Survey: Initial3
08/17/2026B01046970-P3Open ↗
08/13/2026B01046970-P2Open ↗
08/13/2026B01046970-I1Open ↗
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone3
08/17/2026B01046970-P3Open ↗
08/13/2026B01046970-I1Open ↗
08/13/2026B01046970-P2Open ↗
▸DOB NOWProperty Ownership Certification3
08/17/2026B01046970-P3Open ↗
08/17/2026B01046970-I1Open ↗
08/14/2026B01046970-P2Open ↗
▸DOB NOWFinal Survey1
08/17/2026B01046970-I1Open ↗