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Two family converted from one family
603 EAST 23 STREET
BROOKLYN · BIN 3121484
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1920Year Built
2.5Stories
B3Building Class
R3XZoning
2,987 sfGross Floor Area
2Units
0 Open ViolationsFDNY Report ↗
Two family converted from one family · 5,000 sf lot · 0.6 FAR built · Flood zone X
Locations of Work
StructuralGeneral
Floor 11p · 1 filing · 11 docs
Nothing on file for this building.
Building Lifecycle
All (21)Filed (4)Permit Issued (3)Signed Off (2)Violation (1)Special Inspection (11)
12/06/2023
Signed off — Alteration
Prepare the structural design for the back porch on the 1st & 2nd floors, the exterior entry stair to the cellar.
B00523493-I1
11/28/2023
Signed off — Alteration
REPLACEMENT OF EXISTING FIRST FLOOR PORCH AND SECOND FLOOR BALCONY. RECONSTRUCTION AND ENLARGEMENT OF EXTERIOR CELLAR ENTRY. REPLACEMENT OF SELECT WINDOWS.
B00510126-I1
09/01/2023
Filed — Alteration
REPLACEMENT OF EXISTING FIRST FLOOR PORCH AND SECOND FLOOR BALCONY. RECONSTRUCTION AND ENLARGEMENT OF EXTERIOR CELLAR ENTRY. REPLACEMENT OF SELECT WINDOWS.
B00510126-P1
05/18/2023
Special inspection requirement — Air barrier - visual inspection
KATICE HELINSKI
05/18/2023
Special inspection requirement — Energy Code Compliance Inspections
KATICE HELINSKI
05/18/2023
Special inspection requirement — Final
KATICE HELINSKI
05/18/2023
Special inspection requirement — Fenestration areas
KATICE HELINSKI
05/18/2023
Special inspection requirement — Fenestration air leakage
KATICE HELINSKI
05/18/2023
Special inspection requirement — Fenestration and door U-factor and product ratings
KATICE HELINSKI
02/22/2022
Permit issued — General Construction
B00510126-I1-GC
02/03/2022
Permit issued — Structural
B00523493-I1-ST
02/02/2022
Special inspection requirement — Structural Steel - Details
FENG-BAO LIN
02/02/2022
Special inspection requirement — Subgrade Inspections
FENG-BAO LIN
02/02/2022
Special inspection requirement — Final
FENG-BAO LIN
02/02/2022
Special inspection requirement — Structural Wood Frame
FENG-BAO LIN
02/02/2022
Special inspection requirement — Structural Stability – Alterations of existing buildings
FENG-BAO LIN
02/01/2022
Filed — Alteration
Prepare the structural design for the back porch on the 1st & 2nd floors, the exterior entry stair to the cellar.
B00523493-P1
07/07/2021
Filed — Alteration
Prepare the structural design for the back porch on the 1st & 2nd floors, the exterior entry stair to the cellar.
B00523493-I1
07/06/2021
Permit issued — General Construction
B00510126-I1-GC
06/21/2021
Filed — Alteration
REPLACEMENT OF EXISTING FIRST FLOOR PORCH AND SECOND FLOOR BALCONY. RECONSTRUCTION AND ENLARGEMENT OF EXTERIOR CELLAR ENTRY. REPLACEMENT OF SELECT WINDOWS.
B00510126-I1
05/07/2002
Violation issued (ECB, closed)
Plumbing
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
10/07/2014$1.1M—Private party → Private party$385/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
KATICE HELINSKI ARCHITECTURE, PC209/01/2023
STEWART ENGINEERING SERVICES, PLLC202/01/2022
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
MATCHLESS CONSTRUCTION GRGeneral Contractor507/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
STEVEN KUO4979202/01/2022
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWGeneral ConstructionSigned-offMATCHLESS CONSTRUCTION GR02/22/2022
DOB NOWStructuralSigned-offMATCHLESS CONSTRUCTION GR02/03/2022
DOB NOWGeneral ConstructionSigned-offMATCHLESS CONSTRUCTION GR07/06/2021
▾Special Inspection Requirements (DOB NOW) — 11
DateRequirementInspectorRole
05/18/2023Air barrier - visual inspectionKATICE HELINSKIenergy_progress
05/18/2023Energy Code Compliance InspectionsKATICE HELINSKIprogress
05/18/2023FinalKATICE HELINSKIprogress
05/18/2023Fenestration areasKATICE HELINSKIenergy_progress
05/18/2023Fenestration air leakageKATICE HELINSKIenergy_progress
05/18/2023Fenestration and door U-factor and product ratingsKATICE HELINSKIenergy_progress
02/02/2022Structural Steel - DetailsFENG-BAO LINspecial
02/02/2022Subgrade InspectionsFENG-BAO LINspecial
02/02/2022FinalFENG-BAO LINprogress
02/02/2022Structural Wood FrameFENG-BAO LINprogress
02/02/2022Structural Stability – Alterations of existing buildingsFENG-BAO LINspecial
▾Documents — 19 on file (BIS + DOB NOW)
▸Plans & Drawings4
▸DOB NOWPlans/Sketch4
09/01/2026B00510126-I1Request digital key ↗
09/01/2026B00510126-P1Request digital key ↗
09/01/2026B00523493-P1Request digital key ↗
Showing 3 of 4 on file for this type
▸Seals & Professional Certifications11
▸DOB NOWProgress Inspector Seal & Signature4
08/27/2026B00510126-P1Open ↗
08/27/2026B00510126-P1Open ↗
08/24/2026B00523493-I1Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature4
09/01/2026B00510126-I1Open ↗
09/01/2026B00510126-P1Open ↗
09/01/2026B00523493-I1Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature3
08/24/2026B00523493-I1Open ↗
08/24/2026B00523493-I1Open ↗
08/24/2026B00523493-I1Open ↗
▸Environmental & Asbestos3
▸DOB NOWDEP ACP-5: Asbestos Assessment Report2
09/01/2026B00523493-P1Open ↗
09/01/2026B00523493-I1Open ↗
▸DOB NOWDEP ACP-20/ACP-21: Asbestos Project Conditional Completion Form/Asbestos Project Completion Form1
09/01/2026B00510126-I1Open ↗
▸Energy Compliance1
▸DOB NOWEN2: As Built Energy Analysis.1
08/13/2026B00510126-I1Open ↗