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Three families
5420 12 AVENUE
BROOKLYN · BIN 3139319
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1920Year Built
2Stories
C0Building Class
R5Zoning
2,640 sfGross Floor Area
3Units
Rent Stabilized6 Open Violations ▸FDNY Report ↗
Three families · 2,500 sf lot · 1.06 FAR built · Flood zone X
Locations of Work
Architecture
Permit Issued — active, not yet Signed-off
RoofUnder Construction5p · 1 filing · 6 docs
Floor 2Under Construction3p · 1 filing · 6 docs
Floor 1Under Construction4p · 1 filing · 6 docs
CellarUnder Construction4p · 1 filing · 6 docs
Nothing on file for this building.
Building Lifecycle
All (30)Filed (1)Permit Issued (1)Violation (23)Special Inspection (5)
06/10/2026
Permit issued — General Construction
B01326633-I1-GC
04/30/2026
Violation issued (HPD, open)
A
12/18/2025
Filed — Alteration
Exterior alterations to the left side of dwelling: install new windows (lower & 1st levels) and new doorway. Partial removal and reconstruction of detached garage (Exp 3) to remedy Violation #35358547H.
B01326633-I1
12/17/2025
Special inspection requirement — Fire-Resistant Penetrations and Joints
MOHAMED MAHMOUD
12/17/2025
Special inspection requirement — Energy Code Compliance Inspections
MOHAMED MAHMOUD
12/17/2025
Special inspection requirement — Fire-Resistance Rated Construction
MOHAMED MAHMOUD
12/17/2025
Special inspection requirement — Final
Feng Zhang
12/17/2025
Special inspection requirement — Interior lighting power
MOHAMED MAHMOUD
11/19/2025
Violation issued (HPD, open)
I
09/04/2025
Violation issued (ECB, closed)
Construction
06/05/2025
Violation issued (HPD, open)
A
04/03/2024
Violation issued (HPD, open)
A
11/20/2023
Violation issued (HPD, closed)
I
03/20/2023
Violation issued (HPD, open)
A
11/09/2022
Violation issued (HPD, closed)
I
09/07/2022
Violation issued (ECB, closed)
Construction
02/18/2022
Violation issued (HPD, open)
A
04/05/2021
Violation issued (HPD, closed)
I
04/05/2021
Violation issued (HPD, closed)
A
10/28/2019
Violation issued (HPD, closed)
I
10/12/2018
Violation issued (HPD, closed)
I
11/15/2017
Violation issued (HPD, closed)
I
11/01/2016
Violation issued (HPD, closed)
I
10/06/2015
Violation issued (HPD, closed)
I
02/05/2015
Violation issued (HPD, closed)
I
05/14/1987
Violation issued (HPD, closed)
B
05/14/1987
Violation issued (HPD, closed)
B
10/13/1982
Violation issued (HPD, closed)
A
10/13/1982
Violation issued (HPD, closed)
A
10/13/1982
Violation issued (HPD, closed)
B
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
12/02/2021$1.8M—— → —$663/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
FOCAL POINT ARCHITECTS & ASS.112/18/2025
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
MOD CONSULTANTS LLCGeneral Contractor107/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
MSM ENGINEERING SERVICES,8449112/18/2025
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWGeneral ConstructionPermit IssuedMOD CONSULTANTS LLC06/10/2026
▾Special Inspection Requirements (DOB NOW) — 5
DateRequirementInspectorRole
12/17/2025Fire-Resistant Penetrations and JointsMOHAMED MAHMOUDspecial
12/17/2025Energy Code Compliance InspectionsMOHAMED MAHMOUDprogress
12/17/2025Fire-Resistance Rated ConstructionMOHAMED MAHMOUDprogress
12/17/2025FinalFeng Zhangprogress
12/17/2025Interior lighting powerMOHAMED MAHMOUDenergy_progress
▾Documents — 6 on file (BIS + DOB NOW)
▸Plans & Drawings1
▸DOB NOWPlans/Sketch1
08/19/2026B01326633-I1Request digital key ↗
▸Seals & Professional Certifications5
▸DOB NOWProgress Inspector Seal & Signature3
08/23/2026B01326633-I1Open ↗
08/23/2026B01326633-I1Open ↗
08/23/2026B01326633-I1Open ↗
▸DOB NOWDPL-1: Design Professional Seal & Signature1
08/13/2026B01326633-I1Open ↗
▸DOB NOWSpecial Inspector Seal & Signature1
08/23/2026B01326633-I1Open ↗