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Two family converted from one family
428 4 STREET
BROOKLYN · BIN 3021283
💬 Discuss this project
1910Year Built
3Stories
B3Building Class
R6BZoning
2,285 sfGross Floor Area
2Units
Two family converted from one family · Owner of record: 428 4TH STREET LLC · 1,500 sf lot · 1.52 FAR built · Flood zone X
Locations of Work
ArchitectureStructuralElectricalMechanicalPlumbing
Permit Issued — active, not yet Signed-off
RoofUnder Construction16p · 2 filings · 20 docs
Floor 3Under Construction14p · 1 filing · 20 docs
Floor 2Under Construction13p · 1 filing · 20 docs
Floor 1Under Construction26p · 1 filing · 20 docs
CellarUnder Construction12p · 1 filing · 20 docs
▾Design Consultants (Architect / Engineer of Record)
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
BROOKLYN SOLARWORKS203/21/2026
JOSEPH FELLNER803/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
A1 RELIABLE CONST CORPGeneral Contractor604/09/2026
BROOKLYN SOLARWORKS LLCGeneral Contractor203/21/2026
ATTIC TO BASEMENT HOMEGeneral Contractor104/09/2026
OTEC PLBNG & HTG SVCS INCPlumbing106/28/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
SARAH JACOBY ARCHITECT5641407/09/2026
CELIN MUNOZ CONSULTING EN1064704/08/2026
NKM ENGINEERING PLLC6244206/26/2024
Building Lifecycle
All (102)Filed (13)Permit Issued (8)Signed Off (3)Inspection (8)Objection (40)Special Inspection (30)
07/13/2026
Special inspection requirement — Mechanical Systems
Sarah Jacoby
07/13/2026
Special inspection requirement — Permanent certificate
Sarah Jacoby
07/13/2026
Special inspection requirement — Maintenance information
Sarah Jacoby
07/13/2026
Special inspection requirement — Final
Sarah Jacoby
07/13/2026
Special inspection requirement — HVAC-R and service water heating equipment
Sarah Jacoby
07/13/2026
Special inspection requirement — HVAC-R and service water heating system controls
Sarah Jacoby
07/13/2026
Special inspection requirement — HVAC-R and service water piping design and insulation
Sarah Jacoby
07/09/2026
Filed — Alteration CO
SUBSEQUENT FILING FOR MECHANICAL WORK IN CONJUNCTION WITH THE RENOVATION, ENLARGEMENT AND CONVERSION TO 1 FAMILY DWELLING. 1 NEW HVAC AND 1 RELOCATION OF HVAC.
B01096551-P7
05/12/2026
Signed off — Alteration CO
SUBSEQUENT FILING FOR MECHANICAL WORK IN CONJUNCTION WITH THE RENOVATION, ENLARGEMENT AND CONVERSION TO 1 FAMILY DWELLING. 1 NEW HVAC AND 1 RELOCATION OF HVAC.
B01096551-S3
05/04/2026
Signed off — Alteration CO
SUBSEQUENT FILING FOR MECHANICAL WORK IN CONJUNCTION WITH THE RENOVATION, ENLARGEMENT AND CONVERSION TO 1 FAMILY DWELLING. 1 NEW HVAC AND 1 RELOCATION OF HVAC.
B01096551-S4
04/10/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
Celin Munoz
04/10/2026
Special inspection requirement — Structural Steel - High Strength Bolting
Celin Munoz
04/10/2026
Special inspection requirement — Subsurface Investigations (Borings/Test Pits)
SAMER ABOU-GHAIDA
04/10/2026
Special inspection requirement — Footing and Foundation
Celin Munoz
04/10/2026
Special inspection requirement — Masonry
Celin Munoz
04/10/2026
Special inspection requirement — Subgrade Inspections
Celin Munoz
04/10/2026
Special inspection requirement — Structural Steel - Welding
Celin Munoz
04/10/2026
Special inspection requirement — Final
Celin Munoz
04/10/2026
Special inspection requirement — Structural Cold-Formed Steel
Celin Munoz
04/10/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
Celin Munoz
04/10/2026
Special inspection requirement — Post-installed Anchors
Celin Munoz
04/10/2026
Special inspection requirement — Concrete - Cast-In-Place
Celin Munoz
04/10/2026
Special inspection requirement — Structural Steel - Details
Celin Munoz
04/10/2026
Special inspection requirement — Post-installed Anchors
Celin Munoz
04/10/2026
Special inspection requirement — Final
Celin Munoz
04/08/2026
Filed — Alteration CO
SUBSEQUENT FILING FOR MECHANICAL WORK IN CONJUNCTION WITH THE RENOVATION, ENLARGEMENT AND CONVERSION TO 1 FAMILY DWELLING. 1 NEW HVAC AND 1 RELOCATION OF HVAC.
B01096551-P4
04/08/2026
Filed — Alteration CO
SUBSEQUENT FILING FOR MECHANICAL WORK IN CONJUNCTION WITH THE RENOVATION, ENLARGEMENT AND CONVERSION TO 1 FAMILY DWELLING. 1 NEW HVAC AND 1 RELOCATION OF HVAC.
B01096551-P3
03/18/2026
Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Roughing
Certified
View inspection ↗
03/11/2026
Filed — Alteration CO
SUBSEQUENT FILING FOR MECHANICAL WORK IN CONJUNCTION WITH THE RENOVATION, ENLARGEMENT AND CONVERSION TO 1 FAMILY DWELLING. 1 NEW HVAC AND 1 RELOCATION OF HVAC.
B01096551-P5
03/10/2026
Special inspection requirement — HVAC-R and service water piping design and insulation
Sarah Jacoby
03/10/2026
Special inspection requirement — Energy Code Compliance Inspections
Sarah Jacoby
02/18/2026
Special inspection requirement — Permanent certificate
Sarah Jacoby
02/18/2026
Special inspection requirement — Insulation placement and R values
Sarah Jacoby
02/18/2026
Special inspection requirement — Air barrier - visual inspection
Sarah Jacoby
02/18/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
Sarah Jacoby
02/18/2026
Special inspection requirement — Interior lighting power
Sarah Jacoby
02/18/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
Celin Munoz
01/30/2026
Objection resolved — Addressed
01/02/2026
Permit issued — Structural
B01096551-S3-ST
01/02/2026
Permit issued — Foundation
B01096551-S4-FO
12/18/2025
Objection resolved — Addressed
12/18/2025
Objection resolved — Addressed
12/18/2025
Objection resolved — Addressed
12/12/2025
Objection raised — Mechanical
12/12/2025
Objection raised — Mechanical
12/12/2025
Objection raised — Mechanical
11/28/2025
Objection resolved — Addressed
11/28/2025
Objection resolved — Addressed
11/28/2025
Objection resolved — Addressed
11/28/2025
Objection resolved — Addressed
11/28/2025
Objection resolved — Addressed
11/28/2025
Objection resolved — Addressed
11/13/2025
Objection resolved — Addressed
11/13/2025
Objection resolved — Addressed
11/13/2025
Objection resolved — Addressed
11/13/2025
Objection resolved — Addressed
11/12/2025
Objection resolved — Addressed
11/10/2025
Objection raised — Admin
11/10/2025
Objection raised — Cost
11/07/2025
Objection raised — Structural
Latest 60 of 102 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWStructuralPermit IssuedA1 RELIABLE CONST01/02/2026
DOB NOWFoundationSigned-offA1 RELIABLE CONST01/02/2026
DOB NOWFoundationSigned-offA1 RELIABLE CONST09/05/2025
DOB NOWStructuralSigned-offA1 RELIABLE CONST08/26/2025
DOB NOWGeneral ConstructionPermit IssuedA1 RELIABLE CONST08/25/2025
DOB NOWMechanical SystemsPermit IssuedATTIC TO BASEMENT HOME07/29/2025
DOB NOWPlumbingSigned-offOTEC PLBNG & HTG SVCS INC07/24/2025
DOB NOWSolarSigned-offBROOKLYN SOLARWORKS LLC05/02/2024
1 project · most recent 07/09/2026
Heating and Air Conditioning Systems
FiledStatusContractorScopeMake / Model / Capacity
07/09/2026Signed-offA1 RELIABLE CONST CORPHeating and Air Conditioning Systems
Heat / Cool
Mitsubishi Electric MSZ-FS18NA 18,000 BTU · Condensing Unit ×1
MXZ-SM36NL 36,000 BTU · Condensing Unit ×1
MXZ-SM42NLHZ 42,000 BTU · Condensing Unit ×1
1 project · most recent 07/09/2026
Gas Water/Sanitary
FiledStatusContractorScope
07/09/2026Signed-offOTEC PLBNG & HTG SVCS INCGas, Water/Sanitary
2 projects · most recent 04/30/2026
General Wiring
FiledStatusContractorScope
04/30/2026Permit IssuedTRINITY ELECTRIC GROUPGeneral Wiring
06/06/2024CompleteBROOKYLN SOLARWORKS, LLC—
1 project · most recent 07/09/2026
Steel Concrete Masonry
FiledStatusContractorScope
07/09/2026Permit IssuedA1 RELIABLE CONST CORPSteel, Concrete, Masonry
▾Field Inspections (DOB CAP) — 8
DateTypeResultReport
03/18/2026Certified Water and Sanitary-WS-Sanitary Piping-RoughingCertifiedView ↗
08/18/2025Pass-Final PL - Up to 9 Requested FloorsPassView ↗
08/11/2025Pass-Final PL - Up to 9 Requested FloorsPassView ↗
05/16/2025Pass-Final PL - Up to 9 Requested FloorsPassView ↗
04/01/2025Pass-Final SP - Up to 3 Requested FloorsPassView ↗
03/18/2025Certified Sprinkler-SP-Piping Dry/Wet-Hydrostatic TestCertifiedView ↗
02/23/2024Certified Storm Drainage-ST-Piping-UndergroundCertifiedView ↗
02/23/2024Certified Water and Sanitary-WS-Sanitary Piping-UndergroundCertifiedView ↗
▾Special Inspection Requirements (DOB NOW) — 72
DateRequirementInspectorRole
07/13/2026Mechanical SystemsSarah Jacobyspecial
07/13/2026FinalSarah Jacobyprogress
07/13/2026Maintenance informationSarah Jacobyenergy_progress
07/13/2026HVAC-R and service water piping design and insulationSarah Jacobyenergy_progress
07/13/2026Permanent certificateSarah Jacobyenergy_progress
07/13/2026HVAC-R and service water heating equipmentSarah Jacobyenergy_progress
07/13/2026HVAC-R and service water heating system controlsSarah Jacobyenergy_progress
04/10/2026Subgrade InspectionsCelin Munozspecial
04/10/2026Structural Steel - High Strength BoltingCelin Munozspecial
04/10/2026MasonryCelin Munozspecial
04/10/2026Structural Stability – Alterations of existing buildingsCelin Munozspecial
04/10/2026Structural Steel - WeldingCelin Munozspecial
04/10/2026Structural Steel - DetailsCelin Munozspecial
04/10/2026Structural Cold-Formed SteelCelin Munozspecial
04/10/2026FinalCelin Munozprogress
04/10/2026Subsurface Investigations (Borings/Test Pits)SAMER ABOU-GHAIDAspecial
04/10/2026Post-installed AnchorsCelin Munozspecial
04/10/2026Footing and FoundationCelin Munozprogress
04/10/2026FinalCelin Munozprogress
04/10/2026Concrete - Cast-In-PlaceCelin Munozspecial
04/10/2026Post-installed AnchorsCelin Munozspecial
04/10/2026Structural Stability – Alterations of existing buildingsCelin Munozspecial
03/10/2026Energy Code Compliance InspectionsSarah Jacobyprogress
03/10/2026HVAC-R and service water piping design and insulationSarah Jacobyenergy_progress
02/18/2026Fire-Resistance Rated ConstructionSarah Jacobyprogress
Latest 25 of 72.
▾Documents — 120 on file (BIS + DOB NOW)
▸Plans & Drawings13
▸DOB NOWPlans/Sketch13
08/24/2026B01030324-I1Request digital key ↗
08/24/2026B01030324-P1Request digital key ↗
08/21/2026B01096551-I1Request digital key ↗
Showing 3 of 13 on file for this type
▸Zoning, Tax Lot & Property Records6
▸DOB NOWHouse Number Verification: TOPO Stamp2
08/13/2026B01096551-P2Open ↗
08/13/2026B01096551-I1Open ↗
▸DOB NOWZD1: DOB Zoning Diagram2
08/13/2026B01096551-P2Open ↗
08/13/2026B01096551-I1Open ↗
▸DOB NOWZoning Exhibit form (1-5)2
08/13/2026B01096551-P2Open ↗
08/13/2026B01096551-I1Open ↗
▸Seals & Professional Certifications72
▸DOB NOWSpecial Inspector Seal & Signature37
09/29/2026B01096551-S2Open ↗
09/02/2026B01096551-P3Open ↗
09/02/2026B01096551-P3Open ↗
Showing 3 of 37 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature18
08/24/2026B01030324-P1Open ↗
08/24/2026B01030324-I1Open ↗
08/21/2026B01096551-P7Open ↗
Showing 3 of 18 on file for this type
▸DOB NOWProgress Inspector Seal & Signature17
09/29/2026B01096551-S2Open ↗
09/29/2026B01096551-S2Open ↗
09/02/2026B01096551-P3Open ↗
Showing 3 of 17 on file for this type
▸Safety & Tenant Protection2
▸DOB NOWStreet Tree Checklist2
08/13/2026B01096551-I1Open ↗
08/13/2026B01096551-P2Open ↗
▸Environmental & Asbestos13
▸DOB NOWDEP ACP-5: Asbestos Assessment Report13
08/24/2026B01030324-P1Open ↗
08/24/2026B01030324-I1Open ↗
08/21/2026B01096551-P7Open ↗
Showing 3 of 13 on file for this type
▸Inspections & Test Reports3
▸DOB NOWSOIL REPORT2
08/13/2026B01096551-S4Open ↗
08/13/2026B01096551-P3Open ↗
▸DOB NOWTR4 Test Report and Plot Diagram1
08/13/2026B01096551-S4Open ↗
▸Approvals, Objections & Sign-offs1
▸DOB NOWUtility Company Final Acceptance Letter1
08/13/2026B01030324-I1Open ↗
▸Other Documents10
▸DOB NOWPlot Diagram4
08/13/2026B01096551-S4Open ↗
08/13/2026B01096551-I1Open ↗
08/13/2026B01096551-P2Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWSite Survey: Initial2
08/13/2026B01096551-P2Open ↗
08/13/2026B01096551-I1Open ↗
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone2
08/13/2026B01096551-I1Open ↗
08/13/2026B01096551-P2Open ↗
▸DOB NOWProperty Ownership Certification2
08/13/2026B01096551-P2Open ↗
08/13/2026B01096551-I1Open ↗