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Two family converted from one family
325 21ST STREET
BROOKLYN · BIN 3017474
💬 Discuss this project
1905Year Built
2Stories
B3Building Class
R6BZoning
1,208 sfGross Floor Area
2Units
1 Active Violation ▸FDNY Report ↗
Two family converted from one family · Owner of record: 325 21st St · 1,594 sf lot · 0.76 FAR built · Flood zone X
Locations of Work
ArchitectureStructuralMechanicalPlumbingFire Protection
Names shown beside floors are taken automatically from the text of filed documents and may be incomplete or wrong.
Roof36p · 1 filing · 20 docs
Bulkhead3p · 1 filing · 20 docs
Floor 2Demolition of basements54p · 2 filings · 20 docs
Floor 1Construction fence installation57p · 3 filings · 20 docs
CellarDemolition of basements34p · 2 filings · 20 docs
Basement18p · 1 filing · 20 docs
▾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 Studio1008/04/2026
Carey Ngai Consulting Engineering205/30/2025
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
LFNY Consultants803/21/2026
Raymond Ho Architect203/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
Interboro Property ManagementGeneral Contractor807/08/2026
Interboro Property ManagementScaffold207/08/2026
AMC Plumbing, Heating & CLNGPlumbing107/08/2026
J. Caiazzo Plumbing & HeatingFire Protection106/28/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
Joadem4350808/04/2026
Raymond Ho Architect, PLL1654101/07/2026
Building Lifecycle
All (130)Filed (12)Permit Issued (11)Signed Off (7)Violation (5)Inspection (2)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-S4
08/20/2026
Signed off — Alteration CO
Plumbing work as per plans
B01046970-S1
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 ↗
07/01/2026
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 — Zoning
05/20/2026
Objection raised — Scope
05/20/2026
Objection raised — Fire_Protection
05/20/2026
Objection raised — Fire_Protection
05/20/2026
Objection raised — Other
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
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
06/06/2025
Objection raised — Structural
06/06/2025
Objection raised — Structural
06/06/2025
Objection raised — Structural
06/06/2025
Objection raised — Structural
06/06/2025
Objection raised — Structural
Latest 60 of 130 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWGeneral ConstructionPermit IssuedInterboro Property Management06/04/2026
DOB NOWMechanical SystemsSigned-offInterboro Property Management05/08/2026
DOB NOWSprinklersSigned-offAnthony Caiazzo01/28/2026
DOB NOWConstruction FenceSigned-offInterboro Property Management11/03/2025
DOB NOWGeneral ConstructionSigned-offInterboro Property Management11/03/2025
DOB NOWPlumbingSigned-offAMC Plumbing, Heating & CLNG10/23/2025
DOB NOWFoundationSigned-offInterboro Property Management08/11/2025
DOB NOWGeneral ConstructionPermit IssuedInterboro Property Management07/28/2025
DOB NOWStructuralSigned-offInterboro Property Management07/23/2025
DOB NOWConstruction FenceSigned-offInterboro Property Management11/13/2024
DOB NOWGeneral ConstructionSigned-offInterboro Property Management11/13/2024
1 project · most recent 08/04/2026
Heating and Air Conditioning Systems
FiledStatusContractorScopeMake / Model / Capacity
08/04/2026Permit IssuedInterboro Property ManagementHeating 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 project · most recent 08/04/2026
Sprinkler System
FiledStatusContractorScope
08/04/2026Signed-offJ. Caiazzo Plumbing & HeatingSprinkler System
1 project · most recent 08/04/2026
Gas Water/Sanitary
FiledStatusContractorScope
08/04/2026Signed-offAction & A1 Plumbing and Heating CoGas, Water/Sanitary
1 project · most recent 03/18/2026
General Wiring
FiledStatusContractorScope
03/18/2026CompleteRigid ElectricGeneral Wiring
1 project · most recent 08/04/2026
Wood
FiledStatusContractorScope
08/04/2026Permit IssuedInterboro Property ManagementWood
1 project · most recent 10/31/2024
Fence
FiledStatusContractorScope
10/31/2024Signed-offInterboro Property ManagementFence
▾Field Inspections (DOB CAP) — 2
DateTypeResultReport
07/20/2026Pass-Final CND-Occupancy InspectionPassView ↗
11/10/2025Certified Water and Sanitary-WS-Sanitary Piping-UndergroundCertifiedView ↗
▾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-S1Open ↗
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 ↗