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BuildNYC
Primarily 2 family with 1 store or office
1541 50TH STREET
BROOKLYN · Borough Park · BIN 3129157
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1950Year Built
2.75Stories
S2Building Class
R6Zoning
2,598 sfGross Floor Area
3Units
FDNY Report ↗
Primarily 2 family with 1 store or office · Owner of record: 4909 Residence Trust · 5,000 sf lot · 0.52 FAR built · Flood zone X
Locations of Work
Names shown beside floors are taken automatically from the text of filed documents and may be incomplete or wrong.
Floor 2Residence + Community1 filing · 20 docs
Floor 1Residence + Community1 filing · 20 docs
CellarResidence + Community1 filing · 20 docs
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
11/26/2019$3.0M—Private party → Private party$1,155/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
Steel Core Engineering309/03/2026
Lester Katz, Ncarb102/23/2024
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
Expediter Group203/21/2026
Building Lifecycle
All (45)Filed (4)Objection (11)Special Inspection (30)
10/01/2026
Objection raised — Fire_Protection
10/01/2026
Objection raised — Admin
10/01/2026
Objection raised — Admin
10/01/2026
Objection raised — Admin
10/01/2026
Objection raised — Admin
10/01/2026
Objection raised — Admin
10/01/2026
Objection raised — Scope
10/01/2026
Objection raised — Structural
10/01/2026
Objection raised — Structural
09/16/2026
Objection resolved — Resolved
09/12/2026
Objection raised — Other
09/03/2026
Filed — ALT-CO - New Building with Existing Elements to Remain
PROPOSED HORIZONTAL ENLARGEMENT TO CONVERT EXISTING 3-STORY RESIDENTIAL BUILDING TO COMMUNITY FACILITY AND RESIDENTIAL BUILDING.
B00998024-S3
09/03/2026
Filed — ALT-CO - New Building with Existing Elements to Remain
PROPOSED HORIZONTAL ENLARGEMENT TO CONVERT EXISTING 3-STORY RESIDENTIAL BUILDING TO COMMUNITY FACILITY AND RESIDENTIAL BUILDING.
B00998024-S1
09/03/2026
Filed — ALT-CO - New Building with Existing Elements to Remain
PROPOSED HORIZONTAL ENLARGEMENT TO CONVERT EXISTING 3-STORY RESIDENTIAL BUILDING TO COMMUNITY FACILITY AND RESIDENTIAL BUILDING.
B00998024-S2
09/03/2026
Special inspection requirement — Concrete - Cast-In-Place
09/03/2026
Special inspection requirement — Structural Steel - Welding
09/03/2026
Special inspection requirement — Structural Steel - High Strength Bolting
09/03/2026
Special inspection requirement — Underpinning
09/03/2026
Special inspection requirement — Subgrade Inspections
09/03/2026
Special inspection requirement — Subsurface Investigations (Borings/Test Pits)
09/03/2026
Special inspection requirement — Subgrade Inspections
09/03/2026
Special inspection requirement — Concrete - Cast-In-Place
09/03/2026
Special inspection requirement — Post-installed Anchors
09/02/2026
Special inspection requirement — Masonry
09/02/2026
Special inspection requirement — Final
09/02/2026
Special inspection requirement — Footing and Foundation
09/02/2026
Special inspection requirement — Structural Steel - Details
09/02/2026
Special inspection requirement — Structural Cold-Formed Steel
09/02/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
08/31/2026
Special inspection requirement — Footing and Foundation
08/31/2026
Special inspection requirement — Final
08/31/2026
Special inspection requirement — Final
02/24/2025
Special inspection requirement — Structural Stability – Alterations of existing buildings
11/06/2024
Special inspection requirement — Insulation placement and R values
02/23/2024
Filed — ALT-CO - New Building with Existing Elements to Remain
PROPOSED HORIZONTAL ENLARGEMENT TO CONVERT EXISTING 3-STORY RESIDENTIAL BUILDING TO COMMUNITY FACILITY AND RESIDENTIAL BUILDING.
B00998024-I1
02/14/2024
Special inspection requirement — Metering
02/14/2024
Special inspection requirement — Interior lighting power
02/14/2024
Special inspection requirement — Fenestration air leakage
02/14/2024
Special inspection requirement — Maintenance information
02/14/2024
Special inspection requirement — Lighting controls
02/14/2024
Special inspection requirement — Fenestration areas
02/14/2024
Special inspection requirement — Fire-Resistance Rated Construction
02/14/2024
Special inspection requirement — Energy Code Compliance Inspections
02/14/2024
Special inspection requirement — Fire-Resistant Penetrations and Joints
02/14/2024
Special inspection requirement — Exterior lighting power
Nothing on file for this building.
1 project · most recent 09/03/2026
Steel Masonry
FiledStatusContractorScope
09/03/2026——Steel, Masonry
▾Special Inspection Requirements (DOB NOW) — 32
DateRequirementInspectorRole
09/03/2026Concrete - Cast-In-Place—special
09/03/2026Structural Steel - Welding—special
09/03/2026Structural Steel - High Strength Bolting—special
09/03/2026Underpinning—special
09/03/2026Subgrade Inspections—special
09/03/2026Subsurface Investigations (Borings/Test Pits)—special
09/03/2026Subgrade Inspections—special
09/03/2026Concrete - Cast-In-Place—special
09/03/2026Post-installed Anchors—special
09/02/2026Masonry—special
09/02/2026Final—progress
09/02/2026Footing and Foundation—progress
09/02/2026Structural Steel - Details—special
09/02/2026Structural Cold-Formed Steel—special
09/02/2026Structural Stability – Alterations of existing buildings—special
08/31/2026Footing and Foundation—progress
08/31/2026Final—progress
08/31/2026Final—progress
02/24/2025Structural Stability – Alterations of existing buildings—special
11/06/2024Insulation placement and R values—energy_progress
02/14/2024Metering—energy_progress
02/14/2024Interior lighting power—energy_progress
02/14/2024Fenestration air leakage—energy_progress
02/14/2024Maintenance information—energy_progress
02/14/2024Lighting controls—energy_progress
Latest 25 of 32.
▾Documents — 49 on file (BIS + DOB NOW)
▸Plans & Drawings1
▸DOB NOWPlans/Sketch1
08/25/2026B00998024-I1Request digital key ↗
▸Applications & Permits4
▸BISPLAN / WORK APPROVAL APPLICATION4
09/01/2020322046969Open ↗
08/31/2020340759717Open ↗
07/22/2020322046969Open ↗
Showing 3 of 4 on file for this type
▸Zoning, Tax Lot & Property Records3
▸DOB NOWZD1: DOB Zoning Diagram1
08/13/2026B00998024-I1Open ↗
▸DOB NOWHouse Number Verification: TOPO Stamp1
08/13/2026B00998024-I1Open ↗
▸DOB NOWZoning Exhibit form (1-5)1
08/13/2026B00998024-I1Open ↗
▸Seals & Professional Certifications7
▸DOB NOWDPL-1: Design Professional Seal & Signature4
10/05/2026B00998024-S2Open ↗
10/05/2026B00998024-S3Open ↗
10/05/2026B00998024-S1Open ↗
Showing 3 of 4 on file for this type
▸BISPROFESSIONAL CERTIFICATION STATEMENT1
08/31/2020340759717Open ↗
▸BISTECHNICAL REPORT STATEMENT OF RESPONSIBILITY1
08/31/2020340759717Open ↗
▸BISREQUIRED ITEMS CHECKLIST FOR PROFESSIONAL CERTIFICATION1
08/31/2020340759717Open ↗
▸Trade Schedules & Equipment1
▸DOB NOWDEP: Sewer Certification (Sanitary/Storm)1
08/13/2026B00998024-I1Open ↗
▸Safety & Tenant Protection2
▸BISSTREET TREE CHECKLIST1
07/01/2020322046969Open ↗
▸DOB NOWStreet Tree Checklist1
08/13/2026B00998024-I1Open ↗
▸Environmental & Asbestos7
▸DOB NOWDEP ACP-5: Asbestos Assessment Report4
10/05/2026B00998024-S2Open ↗
10/05/2026B00998024-S3Open ↗
10/05/2026B00998024-S1Open ↗
Showing 3 of 4 on file for this type
▸BISASBESTOS: CERTIFICATION (DEP ACP5)3
08/31/2020340759717Open ↗
07/01/2020322046969Open ↗
06/01/2020322046969Open ↗
▸Energy Compliance1
▸BISTECHNICAL REPORT: ENERGY CODE - RESPONSIBILITY1
07/01/2020322046969Open ↗
▸Inspections & Test Reports4
▸BISSOIL REPORT1
07/01/2020322046969Open ↗
▸BISTECHNICAL REPORT: RESPONSIBILITY1
07/01/2020322046969Open ↗
▸DOB NOWTR4 Test Report and Plot Diagram1
10/05/2026B00998024-S2Open ↗
▸DOB NOWSOIL REPORT1
10/05/2026B00998024-S2Open ↗
▸Approvals, Objections & Sign-offs7
▸DOB NOWFee Exempt Supporting Document - DOF ACRIS report or BIB letter4
10/05/2026B00998024-S2Open ↗
10/05/2026B00998024-S3Open ↗
10/05/2026B00998024-S1Open ↗
Showing 3 of 4 on file for this type
▸BISSCHEDULE A - OCCUPANCY / USE3
07/08/2020322046969Open ↗
07/01/2020322046969Open ↗
06/01/2020322046969Open ↗
▸Cost, Insurance & Ownership2
▸BISCOST AFFIDAVIT2
08/31/2020340759717Open ↗
07/01/2020322046969Open ↗
▸Filing & Intake Forms3
▸BISEFILING COVER SHEET2
06/01/2020322046969Open ↗
05/29/2020322046969Open ↗
▸BISEFILING JOB APPLICATION COVER SHEET1
08/31/2020340759717Open ↗
▸Other Documents7
▸BISPLOT DIAGRAM2
07/01/2020322046969Open ↗
06/01/2020322046969Open ↗
▸DOB NOWSite Survey: Initial2
08/13/2026B00998024-I1Open ↗
08/13/2026B00998024-I1Open ↗
▸DOB NOWPlot Diagram1
08/13/2026B00998024-I1Open ↗
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone1
08/13/2026B00998024-I1Open ↗
▸DOB NOWProperty Ownership Certification1
08/13/2026B00998024-I1Open ↗