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Three families
1248 50 STREET
BROOKLYN · BIN 3138039
💬 Discuss this project
1910Year Built
2.5Stories
C0Building Class
R6Zoning
3,336 sfGross Floor Area
3Units
Rent Stabilized0 Open Violations
Three families · 4,007 sf lot · 0.83 FAR built · Flood zone X
Locations of Work
Architecture
Permit Issued — active, not yet Signed-off
RoofUnder Construction1p · 1 filing · 11 docs
PenthouseUnder Construction1p · 1 filing · 11 docs
Floor 3Under Construction1p · 1 filing · 11 docs
Floor 2
Floor 1
CellarUnder Construction1p · 1 filing · 11 docs
1 job · most recent 08/18/2026
Fence
FiledStatusContractorScope
08/18/2026Permit IssuedLIONSTONE DEVELOPERS LLCFence
Building Lifecycle
All (112)Filed (4)Permit Issued (1)Violation (3)Objection (79)Special Inspection (25)
08/18/2026
Filed — New Building
Application filed herewith to propose new building with dwelling units.
B01402545-S1
08/18/2026
Objection raised — Other
08/12/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
MOHAMED MAHMOUD
08/12/2026
Special inspection requirement — Energy Code Compliance Inspections
MOHAMED MAHMOUD
08/12/2026
Special inspection requirement — HVAC-R and service water heating equipment
MOHAMED MAHMOUD
08/12/2026
Special inspection requirement — HVAC-R and service water heating system controls
MOHAMED MAHMOUD
08/12/2026
Special inspection requirement — Maintenance information
MOHAMED MAHMOUD
08/12/2026
Special inspection requirement — HVAC-R and service water piping design and insulation
MOHAMED MAHMOUD
07/29/2026
Filed — Full Demolition
Full demolition of the existing house.
B01433934-I1
07/29/2026
Permit issued — Construction Fence
B01402545-S2-FN
07/13/2026
Objection raised — Other
07/13/2026
Objection resolved — Addressed
07/07/2026
Filed — New Building
Application filed herewith to propose new building with dwelling units.
B01402545-S2
06/24/2026
Objection resolved — Addressed
06/19/2026
Objection resolved — Resolved
06/19/2026
Objection resolved — Addressed
06/19/2026
Objection resolved — Resolved
06/19/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Resolved
06/18/2026
Objection resolved — Resolved
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Resolved
06/18/2026
Objection resolved — Resolved
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Resolved
06/18/2026
Objection resolved — Resolved
06/18/2026
Objection resolved — Resolved
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Resolved
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Resolved
06/18/2026
Objection resolved — Resolved
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Resolved
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Resolved
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Resolved
06/18/2026
Objection resolved — Addressed
06/18/2026
Objection resolved — Resolved
06/18/2026
Objection resolved — Addressed
06/02/2026
Objection raised — Structural
06/02/2026
Objection raised — Zoning
06/02/2026
Objection raised — Zoning
06/02/2026
Objection raised — Fire_Protection
06/02/2026
Objection raised — Accessibility
06/02/2026
Objection raised — Other
06/02/2026
Objection raised — Structural
06/02/2026
Objection raised — Structural
06/02/2026
Objection raised — Fire_Protection
Latest 60 of 112 events.
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
1128BSD409/22/2026
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
MSM ENGINEERING SERVICES, PLLC308/18/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
LIONSTONE DEVELOPERS LLCGeneral Contractor107/30/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
MSM ENGINEERING SERVICES,8449208/18/2026
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWConstruction FencePermit IssuedLIONSTONE DEVELOPERS LLC07/29/2026
BISPLISSUEDM.A.C. PLUMBING, INC11/22/1999
BIS—ISSUEDPALISADES REALTY LLC06/03/1999
▾Special Inspection Requirements (DOB NOW) — 25
DateRequirementInspectorRole
08/12/2026Fire-Resistant Penetrations and JointsMOHAMED MAHMOUDspecial
08/12/2026Energy Code Compliance InspectionsMOHAMED MAHMOUDprogress
08/12/2026HVAC-R and service water heating equipmentMOHAMED MAHMOUDenergy_progress
08/12/2026HVAC-R and service water heating system controlsMOHAMED MAHMOUDenergy_progress
08/12/2026Maintenance informationMOHAMED MAHMOUDenergy_progress
08/12/2026HVAC-R and service water piping design and insulationMOHAMED MAHMOUDenergy_progress
05/14/2026Concrete - Cast-In-PlaceMOHAMED MAHMOUDspecial
05/14/2026Excavations - Sheeting, Shoring, and BracingMOHAMED MAHMOUDspecial
05/14/2026Fire-Resistant Penetrations and JointsMOHAMED MAHMOUDspecial
05/14/2026Structural Stability – Alterations of existing buildingsMOHAMED MAHMOUDspecial
05/14/2026Energy Code Compliance InspectionsMOHAMED MAHMOUDprogress
05/14/2026Fire-Resistance Rated ConstructionMOHAMED MAHMOUDprogress
05/14/2026Air barrier — testing MOHAMED MAHMOUDenergy_progress
05/14/2026Fenestration air leakageMOHAMED MAHMOUDenergy_progress
05/14/2026Insulation placement and R valuesMOHAMED MAHMOUDenergy_progress
05/14/2026Fenestration and door U-factor and product ratingsMOHAMED MAHMOUDenergy_progress
05/14/2026Lighting in dwelling unitsMOHAMED MAHMOUDenergy_progress
05/14/2026Fenestration areasMOHAMED MAHMOUDenergy_progress
05/14/2026Air barrier - visual inspectionMOHAMED MAHMOUDenergy_progress
05/14/2026Permanent certificateMOHAMED MAHMOUDenergy_progress
05/14/2026Interior lighting powerMOHAMED MAHMOUDenergy_progress
05/14/2026Maintenance informationMOHAMED MAHMOUDenergy_progress
05/14/2026Lighting controlsMOHAMED MAHMOUDenergy_progress
05/14/2026MeteringMOHAMED MAHMOUDenergy_progress
05/14/2026Exterior lighting powerMOHAMED MAHMOUDenergy_progress
▾Documents — 15 on file (BIS + DOB NOW)
▸Plans & Drawings4
▸DOB NOWPlans/Sketch4
08/17/2026B01402545-S1Request digital key ↗
08/16/2026B01433934-I1Request digital key ↗
08/15/2026B01402545-S2Request digital key ↗
Showing 3 of 4 on file for this type
▸Zoning, Tax Lot & Property Records2
▸DOB NOWZoning Exhibit form (1-5)1
08/15/2026B01402545-I1Open ↗
▸DOB NOWZD1: DOB Zoning Diagram1
08/15/2026B01402545-I1Open ↗
▸Seals & Professional Certifications2
▸DOB NOWDPL-1: Design Professional Seal & Signature2
08/17/2026B01402545-S2Open ↗
08/17/2026B01402545-I1Open ↗
▸Safety & Tenant Protection2
▸DOB NOWParks Department Acknowledgment Letter for Street Trees Plan1
08/15/2026B01402545-I1Open ↗
▸DOB NOWStreet Tree Checklist1
08/15/2026B01402545-I1Open ↗
▸Other Documents5
▸DOB NOWProperty Ownership Certification2
08/16/2026B01433934-I1Open ↗
08/15/2026B01402545-I1Open ↗
▸DOB NOWStructure Photographs1
08/16/2026B01433934-I1Open ↗
▸DOB NOWSite Survey: Initial1
08/15/2026B01402545-I1Open ↗
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone1
08/15/2026B01402545-I1Open ↗