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BuildNYC
Three families
323 AVENUE O
BROOKLYN · BIN 3173603
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1930Year Built
2.75Stories
C0Building Class
R5Zoning
2,438 sfGross Floor Area
3Units
Rent Stabilized9 Active Violations ▸FDNY Report ↗
Three families · 4,000 sf lot · 0.61 FAR built · Flood zone X
Locations of Work
ArchitectureStructuralElectricalMechanicalPlumbingCivilGeneralOther
Names shown beside floors are taken automatically from the text of filed documents and may be incomplete or wrong.
Permit Issued — active, not yet Signed-off
RoofL AlterationUnder Construction4p · 1 filing · 20 docs
Floor 3L AlterationUnder Construction103p · 1 filing · 20 docs
Floor 2L AlterationUnder Construction96p · 1 filing · 20 docs
Floor 1L AlterationUnder Construction102p · 1 filing · 20 docs
CellarL AlterationUnder Construction97p · 1 filing · 20 docs
Site & exteriorL AlterationUnder Construction115p · 1 filing · 20 docs
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
11/02/2022$2.4M—— → —$964/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
AL Ffred Architecture909/18/2026
MSM Engineering Services212/10/2024
None609/26/2024
Real Engineering105/11/2023
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
XYZ Code Consulting1603/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
Baruch BuildersGeneral Contractor907/08/2026
Baruch BuildersScaffold507/08/2026
Ness Mechanical P & HPlumbing207/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
MSM Engineering Services8449909/18/2026
AA Building & Inspection1519112/19/2025
M. International Engineering3129611/04/2024
Shahrish Shuvo Engineering8524108/17/2023
Building Lifecycle
All (171)Filed (18)Permit Issued (13)Signed Off (4)Violation (26)Inspection (6)Objection (74)Special Inspection (30)
09/18/2026
Filed — ALT-CO - New Building with Existing Elements to Remain
APPLICATION FILED HEREWITH TO PROPOSE HORIZONTAL AND VERTICAL EXTENSION OF EXISTING TWO(2) STORY WITH CELLAR AND ATTIC, THREE (3) DWELLING UNIT BUILDING. CONVERTING TO A ONE (1)FAMILY BUILDING.
B00869984-A2
09/16/2026
Special inspection requirement — Energy Code Compliance Inspections
MOHAMED MAHMOUD
09/16/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
MOHAMED MAHMOUD
09/14/2026
Signed off — ALT-CO - New Building with Existing Elements to Remain
APPLICATION FILED HEREWITH TO PROPOSE HORIZONTAL AND VERTICAL EXTENSION OF EXISTING TWO(2) STORY WITH CELLAR AND ATTIC, THREE (3) DWELLING UNIT BUILDING. CONVERTING TO A ONE (1)FAMILY BUILDING.
B00869984-S3
08/21/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
MOHAMED MAHMOUD
08/21/2026
Special inspection requirement — Energy Code Compliance Inspections
MOHAMED MAHMOUD
08/21/2026
Special inspection requirement — Energy Code Compliance Inspections
MOHAMED MAHMOUD
08/21/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
MOHAMED MAHMOUD
08/03/2026
Inspection — Pass-Final CND-Occupancy Inspection
Pass
View inspection ↗
07/20/2026
Objection resolved — Resolved
07/07/2026
Signed off — ALT-CO - New Building with Existing Elements to Remain
APPLICATION FILED HEREWITH TO PROPOSE HORIZONTAL AND VERTICAL EXTENSION OF EXISTING TWO(2) STORY WITH CELLAR AND ATTIC, THREE (3) DWELLING UNIT BUILDING. CONVERTING TO A ONE (1)FAMILY BUILDING.
B00869984-S6
06/26/2026
Permit issued — Mechanical Systems
B00869984-S6-MS
06/19/2026
Signed off — ALT-CO - New Building with Existing Elements to Remain
APPLICATION FILED HEREWITH TO PROPOSE HORIZONTAL AND VERTICAL EXTENSION OF EXISTING TWO(2) STORY WITH CELLAR AND ATTIC, THREE (3) DWELLING UNIT BUILDING. CONVERTING TO A ONE (1)FAMILY BUILDING.
B00869984-S1
05/26/2026
Objection raised — Inspections
05/08/2026
Permit issued — Plumbing
B00869984-S2-PL
05/05/2026
Filed — ALT-CO - New Building with Existing Elements to Remain
APPLICATION FILED HEREWITH TO PROPOSE HORIZONTAL AND VERTICAL EXTENSION OF EXISTING TWO(2) STORY WITH CELLAR AND ATTIC, THREE (3) DWELLING UNIT BUILDING. CONVERTING TO A ONE (1)FAMILY BUILDING.
B00869984-P9
05/01/2026
Violation issued (HPD, open)
A
04/23/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
MOHAMED MAHMOUD
04/23/2026
Special inspection requirement — Energy Code Compliance Inspections
MOHAMED MAHMOUD
04/10/2026
Permit issued — Construction Fence
B00869984-S1-FN
04/02/2026
Violation issued (ECB, closed)
Construction
03/19/2026
Permit issued — General Construction
B00869984-I1-GC
01/14/2026
Violation issued (DOB, closed)
V*-DOB VIOLATION - DISMISSED
12/19/2025
Filed — ALT-CO - New Building with Existing Elements to Remain
APPLICATION FILED HEREWITH TO PROPOSE HORIZONTAL AND VERTICAL EXTENSION OF EXISTING TWO(2) STORY WITH CELLAR AND ATTIC, THREE (3) DWELLING UNIT BUILDING. CONVERTING TO A ONE (1)FAMILY BUILDING.
B00869984-S6
12/18/2025
Special inspection requirement — HVAC-R and service water heating system controls
Younes Abouyaala
12/18/2025
Special inspection requirement — Ventilation and air distribution system
Younes Abouyaala
12/18/2025
Special inspection requirement — HVAC-R and service water piping design and insulation
Younes Abouyaala
12/18/2025
Special inspection requirement — HVAC-R and service water heating equipment
Younes Abouyaala
11/21/2025
Special inspection requirement — Final
Feng Zhang
11/21/2025
Special inspection requirement — Mechanical Systems
Younes Abouyaala
11/20/2025
Violation issued (HPD, open)
I
11/11/2025
Signed off — ALT-CO - New Building with Existing Elements to Remain
APPLICATION FILED HEREWITH TO PROPOSE HORIZONTAL AND VERTICAL EXTENSION OF EXISTING TWO(2) STORY WITH CELLAR AND ATTIC, THREE (3) DWELLING UNIT BUILDING. CONVERTING TO A ONE (1)FAMILY BUILDING.
B00869984-S5
10/23/2025
Violation issued (ECB, closed)
Construction
10/20/2025
Objection resolved — Addressed
10/06/2025
Objection resolved — Addressed
10/01/2025
Objection raised — Other
10/01/2025
Objection raised — Zoning
09/17/2025
Filed — ALT-CO - New Building with Existing Elements to Remain
APPLICATION FILED HEREWITH TO PROPOSE HORIZONTAL AND VERTICAL EXTENSION OF EXISTING TWO(2) STORY WITH CELLAR AND ATTIC, THREE (3) DWELLING UNIT BUILDING. CONVERTING TO A ONE (1)FAMILY BUILDING.
B00869984-P8
09/09/2025
Violation issued (ECB, closed)
Construction
09/08/2025
Special inspection requirement — Concrete - Cast-In-Place
MOHAMED MAHMOUD
09/08/2025
Special inspection requirement — Permanent certificate
MOHAMED MAHMOUD
09/08/2025
Special inspection requirement — Metering
MOHAMED MAHMOUD
09/08/2025
Special inspection requirement — Air barrier - visual inspection
MOHAMED MAHMOUD
09/08/2025
Special inspection requirement — Fenestration areas
MOHAMED MAHMOUD
09/08/2025
Special inspection requirement — Maintenance information
MOHAMED MAHMOUD
09/08/2025
Special inspection requirement — Interior lighting power
MOHAMED MAHMOUD
09/08/2025
Special inspection requirement — Electric vehicle service equipment requirements
MOHAMED MAHMOUD
09/08/2025
Special inspection requirement — Fire-Resistance Rated Construction
MOHAMED MAHMOUD
09/08/2025
Special inspection requirement — Energy Code Compliance Inspections
MOHAMED MAHMOUD
09/08/2025
Special inspection requirement — Structural Stability – Alterations of existing buildings
MOHAMED MAHMOUD
09/08/2025
Special inspection requirement — Insulation placement and R values
MOHAMED MAHMOUD
09/08/2025
Special inspection requirement — Private On-Site Storm Water Disposal Systems-, and Detention Facilities, Installation
MOHAMED MAHMOUD
09/08/2025
Special inspection requirement — Fenestration and door U-factor and product ratings
MOHAMED MAHMOUD
09/08/2025
Special inspection requirement — Air barrier — testing
MOHAMED MAHMOUD
09/08/2025
Special inspection requirement — Fire-Resistant Penetrations and Joints
MOHAMED MAHMOUD
08/28/2025
Violation issued (ECB, closed)
Construction
08/22/2025
Inspection — Fail-Final House Connection
Fail
View inspection ↗
08/12/2025
Inspection — Certified Gas-Gas-Piping-Roughing
Certified
View inspection ↗
08/12/2025
Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Roughing
Certified
View inspection ↗
06/06/2025
Violation issued (HPD, open)
A
Latest 60 of 171 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWMechanical SystemsSigned-offBaruch Builders06/26/2026
DOB NOWPlumbingPermit IssuedNess Mechanical P & H05/08/2026
DOB NOWConstruction FenceSigned-offBaruch Builders04/10/2026
DOB NOWGeneral ConstructionPermit IssuedBaruch Builders03/19/2026
DOB NOWGeneral ConstructionPermit IssuedBaruch Builders04/01/2025
DOB NOWConstruction FenceSigned-offBaruch Builders04/01/2025
DOB NOWPlumbingPermit IssuedNess Mechanical P & H02/25/2025
DOB NOWConstruction FenceSigned-offBaruch Builders05/09/2024
DOB NOWSupport of ExcavationSigned-offBaruch Builders05/02/2024
DOB NOWFoundationPermit IssuedBaruch Builders05/01/2024
DOB NOWStructuralSigned-offBaruch Builders05/01/2024
DOB NOWGeneral ConstructionPermit IssuedBaruch Builders04/16/2024
DOB NOWConstruction FenceSigned-offBaruch Builders05/17/2023
1 project · most recent 09/18/2026
Gas Storm Water/Sanitary
FiledStatusContractorScope
09/18/2026Permit IssuedNess Mechanical P & HGas, Storm, Water/Sanitary
1 project · most recent 06/11/2025
General Wiring
FiledStatusContractorScope
06/11/2025CompleteAccurate ElectricalGeneral Wiring
1 project · most recent 09/18/2026
Steel Concrete Wood
FiledStatusContractorScope
09/18/2026Signed-offBaruch BuildersSteel, Concrete, Wood
1 project · most recent 09/18/2026
Fence
FiledStatusContractorScope
09/18/2026Signed-offBaruch BuildersFence
▾Field Inspections (DOB CAP) — 6
DateTypeResultReport
08/03/2026Pass-Final CND-Occupancy InspectionPassView ↗
08/22/2025Fail-Final House ConnectionFailView ↗
08/12/2025Certified Gas-Gas-Piping-RoughingCertifiedView ↗
08/12/2025Certified Water and Sanitary-WS-Sanitary Piping-RoughingCertifiedView ↗
02/28/2025Certified Storm Drainage-ST-Piping-RoughingCertifiedView ↗
02/28/2025Certified Water and Sanitary-WS-Sanitary Piping-UndergroundCertifiedView ↗
▾Special Inspection Requirements (DOB NOW) — 98
DateRequirementInspectorRole
09/16/2026Fire-Resistant Penetrations and JointsMOHAMED MAHMOUDspecial
09/16/2026Energy Code Compliance InspectionsMOHAMED MAHMOUDprogress
08/21/2026Energy Code Compliance InspectionsMOHAMED MAHMOUDprogress
08/21/2026Fire-Resistant Penetrations and JointsMOHAMED MAHMOUDspecial
08/21/2026Energy Code Compliance InspectionsMOHAMED MAHMOUDprogress
08/21/2026Fire-Resistant Penetrations and JointsMOHAMED MAHMOUDspecial
04/23/2026Energy Code Compliance InspectionsMOHAMED MAHMOUDprogress
04/23/2026Fire-Resistant Penetrations and JointsMOHAMED MAHMOUDspecial
12/18/2025HVAC-R and service water heating equipmentYounes Abouyaalaenergy_progress
12/18/2025HVAC-R and service water piping design and insulationYounes Abouyaalaenergy_progress
12/18/2025Ventilation and air distribution systemYounes Abouyaalaenergy_progress
12/18/2025HVAC-R and service water heating system controlsYounes Abouyaalaenergy_progress
11/21/2025FinalFeng Zhangprogress
11/21/2025Mechanical SystemsYounes Abouyaalaspecial
09/08/2025Concrete - Cast-In-PlaceMOHAMED MAHMOUDspecial
09/08/2025Excavations - Sheeting, Shoring, and BracingMOHAMED MAHMOUDspecial
09/08/2025Fire-Resistant Penetrations and JointsMOHAMED MAHMOUDspecial
09/08/2025Private On-Site Storm Water Disposal Systems-, and Detention Facilities, InstallationMOHAMED MAHMOUDspecial
09/08/2025Structural Stability – Alterations of existing buildingsMOHAMED MAHMOUDspecial
09/08/2025Energy Code Compliance InspectionsMOHAMED MAHMOUDprogress
09/08/2025Fire-Resistance Rated ConstructionMOHAMED MAHMOUDprogress
09/08/2025Electric vehicle service equipment requirementsMOHAMED MAHMOUDenergy_progress
09/08/2025Interior lighting powerMOHAMED MAHMOUDenergy_progress
09/08/2025Maintenance informationMOHAMED MAHMOUDenergy_progress
09/08/2025Fenestration areasMOHAMED MAHMOUDenergy_progress
Latest 25 of 98.
▾Documents — 130 on file (BIS + DOB NOW)
▸Plans & Drawings19
▸DOB NOWPlans/Sketch19
08/27/2026B00873170-I1Request digital key ↗
08/27/2026B00869984-P9Request digital key ↗
08/27/2026B00869984-S2Request digital key ↗
Showing 3 of 19 on file for this type
▸Applications & Permits1
▸BISBPP-5 - Authorization to the Department of Transportation1
12/03/2025340922023Open ↗
▸Zoning, Tax Lot & Property Records9
▸DOB NOWZD1: DOB Zoning Diagram4
08/17/2026B00869984-I1Open ↗
08/17/2026B00869984-AR01Open ↗
08/13/2026B00869984-P5Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWZoning Exhibit form (1-5)4
08/17/2026B00869984-AR01Open ↗
08/17/2026B00869984-I1Open ↗
08/14/2026B00869984-P5Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWHouse Number Verification: TOPO Stamp1
08/17/2026B00869984-I1Open ↗
▸Seals & Professional Certifications58
▸DOB NOWProgress Inspector Seal & Signature24
10/05/2026B00869984-A2Open ↗
09/02/2026B00869984-S2Open ↗
09/01/2026B00869984-S4Open ↗
Showing 3 of 24 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature19
10/05/2026B00869984-A2Open ↗
08/27/2026B00873170-I1Open ↗
08/27/2026B00869984-S2Open ↗
Showing 3 of 19 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature15
10/05/2026B00869984-A2Open ↗
09/02/2026B00869984-S2Open ↗
09/01/2026B00869984-S5Open ↗
Showing 3 of 15 on file for this type
▸Trade Schedules & Equipment4
▸DOB NOWDEP: Sewer Certification (Sanitary/Storm)4
08/17/2026B00869984-AR01Open ↗
08/17/2026B00869984-I1Open ↗
08/14/2026B00869984-P5Open ↗
Showing 3 of 4 on file for this type
▸Safety & Tenant Protection3
▸BISBPP: STREET TREES SITE PLAN1
12/03/2025340922023Open ↗
▸DOB NOWStreet Trees Site Plan1
08/13/2026B00869984-I1Open ↗
▸DOB NOWParks Department Acknowledgment Letter for Street Trees Plan1
08/13/2026B00869984-I1Open ↗
▸Environmental & Asbestos18
▸DOB NOWDEP ACP-5: Asbestos Assessment Report18
10/05/2026B00869984-A2Open ↗
08/27/2026B00873170-I1Open ↗
08/17/2026B00869984-S4Open ↗
Showing 3 of 18 on file for this type
▸Inspections & Test Reports2
▸DOB NOWGeotechnical Report (BC 1803.6)2
08/13/2026B00869984-S5Open ↗
08/13/2026B00869984-S4Open ↗
▸Filing & Intake Forms1
▸BISEFILING JOB APPLICATION COVER SHEET1
12/03/2025340922023Open ↗
▸Other Documents15
▸DOB NOWSite Survey: Initial4
08/17/2026B00869984-I1Open ↗
08/17/2026B00869984-AR01Open ↗
08/14/2026B00869984-P5Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone4
08/17/2026B00869984-AR01Open ↗
08/17/2026B00869984-I1Open ↗
08/14/2026B00869984-P5Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWProperty Ownership Certification4
08/17/2026B00869984-AR01Open ↗
08/17/2026B00869984-I1Open ↗
08/14/2026B00869984-P5Open ↗
Showing 3 of 4 on file for this type
▸BISRECORDS MGMT FEE PAYMENT RECEIPT1
12/03/2025340922023Open ↗
▸BISBPP - SUPPORTING DOCUMENTATION1
12/03/2025340922023Open ↗
▸DOB NOWAdjoining Owners Notification1
08/13/2026B00869984-S5Open ↗