← Back
Three families
248 20 STREET
BROOKLYN · BIN 3017377
💬 Discuss this project
1899Year Built
3Stories
C0Building Class
R6AZoning
2,772 sfGross Floor Area
3Units
Rent Stabilized3 Open Violations ▸FDNY Report ↗
Three families · Owner of record: 248 20TH STREET LLC · 1,879 sf lot · 1.48 FAR built · Flood zone X
Locations of Work
ArchitectureStructuralMechanicalPlumbingFire Protection
Permit Issued — active, not yet Signed-off
RoofUnder Construction19p · 1 filing · 20 docs
Floor 6Under Construction22p · 1 filing · 20 docs
Floor 5Under Construction11p · 1 filing · 20 docs
Floor 4Under Construction22p · 1 filing · 20 docs
Floor 3Under Construction27p · 2 filings · 20 docs
Floor 2Under Construction7p · 1 filing · 20 docs
Floor 1Under Construction15p · 1 filing · 20 docs
CellarUnder Construction20p · 1 filing · 20 docs
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
248 20TH STREET LLC103/22/2026
STEEL TONE CONSTRUCTION103/22/2026
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
12/16/2024$2.4M—Private party → 248 20TH STREET LLC$853/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
AARON HOCKETT ARCHITECT506/22/2026
JIAN ENGINEERING PLLC206/01/2026
STRATFORD ENGINEERING503/18/2026
YANG ENGINEERING LLC102/24/2026
HRM ENGINEERING SERVICES, PC305/16/2025
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
SD DESIGN STUDIO203/21/2026
WILLIAM VITACCO ASSOCIATES2003/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
ST TONE MANAGEMENT INCGeneral Contractor1108/25/2026
STEEL TONE CONSTRUCTIONGeneral Contractor704/09/2026
BROOKYLN SOLARWORKS, LLCElectrical103/22/2026
HF GROUP PLMBG & SPNKLERFire Protection107/08/2026
AMC PLBG HTG CLNGGeneral Contractor104/09/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
WELLDONE INSPECTION INC.86281106/22/2026
JIAN ENGINEERING PLLC7397206/01/2026
Building Lifecycle
All (162)Filed (16)Permit Issued (18)Violation (14)Inspection (4)Objection (80)Special Inspection (30)
08/24/2026
Permit issued — General Construction
B01213386-I1-GC
07/29/2026
Objection resolved — Open
07/22/2026
Permit issued — Sidewalk Shed
B01363882-I1-SH
06/30/2026
Objection raised — Other
06/22/2026
Filed — ALT-CO - New Building with Existing Elements to Remain
Modifications to existing Mechanical Systems as per plans filed herewith.
B01213386-P5
06/22/2026
Special inspection requirement — Air barrier - visual inspection
QIUFAN JIANG
06/22/2026
Special inspection requirement — Fenestration areas
QIUFAN JIANG
06/22/2026
Special inspection requirement — Electrical motors and elevators
QIUFAN JIANG
06/22/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
QIUFAN JIANG
06/22/2026
Special inspection requirement — Fire-Resistance Rated Construction
QIUFAN JIANG
06/22/2026
Special inspection requirement — Protection of exposed foundation insulation
QIUFAN JIANG
06/22/2026
Special inspection requirement — Interior lighting power
QIUFAN JIANG
06/22/2026
Special inspection requirement — Lighting in dwelling units
QIUFAN JIANG
06/22/2026
Special inspection requirement — Metering
QIUFAN JIANG
06/22/2026
Special inspection requirement — Fenestration and door U-factor and product ratings
QIUFAN JIANG
06/22/2026
Special inspection requirement — Lighting controls
QIUFAN JIANG
06/22/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
QIUFAN JIANG
06/22/2026
Special inspection requirement — Fenestration air leakage
QIUFAN JIANG
06/22/2026
Special inspection requirement — Insulation placement and R values
QIUFAN JIANG
06/22/2026
Special inspection requirement — Exterior lighting power
QIUFAN JIANG
06/22/2026
Special inspection requirement — Maintenance information
QIUFAN JIANG
06/09/2026
Permit issued — Supported Scaffold
B01410116-I1-SF
06/03/2026
Objection resolved — Addressed
06/02/2026
Violation issued (ECB, open)
Construction
06/02/2026
Objection raised — Other
06/01/2026
Filed — Alteration
FILE SUPPORTED SCAFFOLD IN CONJUNCTION WITH ALT-CO NB JOB #: B01213386-I1.
B01410116-I1
05/11/2026
Violation issued (ECB, closed)
Unknown
05/01/2026
Violation issued (HPD, open)
A
04/29/2026
Permit issued — Protection and Mechanical Methods
B01380931-I1-PMM
04/14/2026
Special inspection requirement — Concrete - Cast-In-Place
QIUFAN JIANG
04/14/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
QIUFAN JIANG
04/14/2026
Special inspection requirement — Subsurface Investigations (Borings/Test Pits)
Paul Raymond
04/14/2026
Special inspection requirement — Footing and Foundation
QIUFAN JIANG
04/14/2026
Special inspection requirement — Post-installed Anchors
QIUFAN JIANG
04/14/2026
Special inspection requirement — Final
QIUFAN JIANG
04/14/2026
Special inspection requirement — Subgrade Inspections
QIUFAN JIANG
04/13/2026
Objection resolved — Addressed
04/10/2026
Objection raised — Scope
04/03/2026
Objection raised — Scope
04/03/2026
Objection resolved — Addressed
04/01/2026
Filed — Alteration
FILED A NEEDLE BEAM ON 3RD FLOOR IN CONJUNCTION WITH ALT-CO NB JOB #: B01213386-I1.
B01380931-I1
03/31/2026
Special inspection requirement — Final
QIUFAN JIANG
03/31/2026
Special inspection requirement — Masonry
QIUFAN JIANG
03/31/2026
Special inspection requirement — Post-installed Anchors
QIUFAN JIANG
03/31/2026
Special inspection requirement — Concrete - Cast-In-Place
QIUFAN JIANG
03/31/2026
Special inspection requirement — Structural Steel - Details
QIUFAN JIANG
03/31/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
QIUFAN JIANG
03/31/2026
Special inspection requirement — Structural Cold-Formed Steel
QIUFAN JIANG
03/25/2026
Objection raised — Other
03/25/2026
Objection resolved — Addressed
03/19/2026
Violation issued (ECB, closed)
Construction
03/19/2026
Violation issued (ECB, closed)
Unknown
03/19/2026
Violation issued (ECB, closed)
Unknown
03/18/2026
Filed — ALT-CO - New Building with Existing Elements to Remain
Modifications to existing Mechanical Systems as per plans filed herewith.
B01213386-P4
03/18/2026
Filed — ALT-CO - New Building with Existing Elements to Remain
Modifications to existing Mechanical Systems as per plans filed herewith.
B01213386-P3
03/16/2026
Permit issued — General Construction
B01213386-I1-GC
03/13/2026
Permit issued — Support of Excavation
B01213386-S1-SE
03/13/2026
Permit issued — Construction Fence
B01277819-I1-FN
03/13/2026
Permit issued — Foundation
B01213386-S5-FO
03/13/2026
Permit issued — Mechanical Systems
B01213386-S2-MS
Latest 60 of 162 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWGeneral ConstructionPermit IssuedST TONE MANAGEMENT INC08/24/2026
DOB NOWSidewalk ShedPermit IssuedST TONE MANAGEMENT INC07/22/2026
DOB NOWSupported ScaffoldPermit IssuedST TONE MANAGEMENT INC06/09/2026
DOB NOWProtection and Mechanical MethodsPermit IssuedST TONE MANAGEMENT INC04/29/2026
DOB NOWGeneral ConstructionPermit IssuedST TONE MANAGEMENT INC03/16/2026
DOB NOWSupport of ExcavationPermit IssuedST TONE MANAGEMENT INC03/13/2026
DOB NOWConstruction FencePermit IssuedST TONE MANAGEMENT INC03/13/2026
DOB NOWFoundationPermit IssuedST TONE MANAGEMENT INC03/13/2026
DOB NOWMechanical SystemsPermit IssuedST TONE MANAGEMENT INC03/13/2026
DOB NOWStructuralPermit IssuedST TONE MANAGEMENT INC03/13/2026
DOB NOWSidewalk ShedPermit IssuedST TONE MANAGEMENT INC03/04/2026
DOB NOWSprinklersPermit IssuedHF GROUP PLMBG & SPNKLER02/17/2026
DOB NOWGeneral ConstructionPermit IssuedSTEEL TONE CONSTRUCTION12/04/2025
DOB NOWStructuralPermit IssuedSTEEL TONE CONSTRUCTION10/17/2025
DOB NOWSupport of ExcavationPermit IssuedSTEEL TONE CONSTRUCTION10/16/2025
DOB NOWConstruction FencePermit IssuedSTEEL TONE CONSTRUCTION10/16/2025
DOB NOWFoundationPermit IssuedSTEEL TONE CONSTRUCTION10/16/2025
DOB NOWMechanical SystemsPermit IssuedSTEEL TONE CONSTRUCTION10/16/2025
BISOTISSUEDBROOKLYN SOLARWORKS LLC10/27/2022
BISOTISSUEDJ'S CUSTOM CONTRACTING IN12/07/2007
1 project · most recent 06/22/2026
Air Conditioning Systems Heating and Air Conditioning Systems Ventilation Systems
FiledStatusContractorScopeMake / Model / Capacity
06/22/2026Permit IssuedST TONE MANAGEMENT INCAir Conditioning Systems, Heating and Air Conditioning Systems, Ventilation Systems
Cooling
Mitsubishi Electric PUY-A12NKA7 1 tons · Vrf Outdoor ×1
Heat / Cool
Mitsubishi Electric MXZ-SM48NAM2 4 tons · Vrf Outdoor ×3
MXZ-SM60NAM2 5 tons · Vrf Outdoor ×1
Ventilation
Renewaire SL75 110 CFM · Erv ×5
1 project · most recent 06/22/2026
Storm Water/Sanitary
FiledStatusContractorScope
06/22/2026——Storm, Water/Sanitary
6 projects · most recent 08/21/2026
General Wiring
FiledStatusContractorScope
08/21/2026Permit IssuedKJK ELECTRIC INCGeneral Wiring
04/28/2026Permit IssuedTUXEDO ELEC'L CONTR'G INC—
02/27/2026Permit IssuedTOMORROW ELECTRICAL LLC—
12/02/2025Permit IssuedTOMORROW ELECTRICAL LLCGeneral Wiring
02/23/2023CompleteBROOKYLN SOLARWORKS, LLC3 meters
12/01/2022CompleteBROOKYLN SOLARWORKS, LLC—
1 project · most recent 06/22/2026
Steel Concrete Masonry
FiledStatusContractorScope
06/22/2026Permit IssuedST TONE MANAGEMENT INCSteel, Concrete, Masonry
2 projects · most recent 06/22/2026
Sidewalk Shed Scaffold
FiledStatusContractorScope
06/22/2026Permit IssuedST TONE MANAGEMENT INCSidewalk Shed
06/01/2026Permit IssuedST TONE MANAGEMENT INCScaffold
▾Field Inspections (DOB CAP) — 4
DateTypeResultReport
03/02/2026Fail-Final PL - Up to 3 Requested FloorsFailView ↗
02/02/2026Pass-Final PL - Up to 3 Requested FloorsPassView ↗
01/16/2026Pass-Final PL - Up to 9 Requested FloorsPassView ↗
09/09/2025Pass-Final PL - UndergroundPassView ↗
▾Special Inspection Requirements (DOB NOW) — 89
DateRequirementInspectorRole
06/22/2026Fire-Resistant Penetrations and JointsQIUFAN JIANGspecial
06/22/2026Fenestration and door U-factor and product ratingsQIUFAN JIANGenergy_progress
06/22/2026Lighting in dwelling unitsQIUFAN JIANGenergy_progress
06/22/2026MeteringQIUFAN JIANGenergy_progress
06/22/2026Maintenance informationQIUFAN JIANGenergy_progress
06/22/2026Lighting controlsQIUFAN JIANGenergy_progress
06/22/2026Interior lighting powerQIUFAN JIANGenergy_progress
06/22/2026Protection of exposed foundation insulationQIUFAN JIANGenergy_progress
06/22/2026Fenestration air leakageQIUFAN JIANGenergy_progress
06/22/2026Fenestration areasQIUFAN JIANGenergy_progress
06/22/2026Air barrier - visual inspectionQIUFAN JIANGenergy_progress
06/22/2026Electrical motors and elevatorsQIUFAN JIANGenergy_progress
06/22/2026Insulation placement and R valuesQIUFAN JIANGenergy_progress
06/22/2026Exterior lighting powerQIUFAN JIANGenergy_progress
06/22/2026Fire-Resistance Rated ConstructionQIUFAN JIANGprogress
06/22/2026Structural Stability – Alterations of existing buildingsQIUFAN JIANGspecial
04/14/2026Structural Stability – Alterations of existing buildingsQIUFAN JIANGspecial
04/14/2026FinalQIUFAN JIANGprogress
04/14/2026Footing and FoundationQIUFAN JIANGprogress
04/14/2026Post-installed AnchorsQIUFAN JIANGspecial
04/14/2026Subgrade InspectionsQIUFAN JIANGspecial
04/14/2026Subsurface Investigations (Borings/Test Pits)Paul Raymondspecial
04/14/2026Concrete - Cast-In-PlaceQIUFAN JIANGspecial
03/31/2026Structural Cold-Formed SteelQIUFAN JIANGspecial
03/31/2026Structural Stability – Alterations of existing buildingsQIUFAN JIANGspecial
Latest 25 of 89.
▾Documents — 125 on file (BIS + DOB NOW)
▸Plans & Drawings16
▸DOB NOWPlans/Sketch16
08/20/2026B01277819-I1Request digital key ↗
08/18/2026B01363882-I1Request digital key ↗
08/17/2026B01213386-S4Request digital key ↗
Showing 3 of 16 on file for this type
▸Applications & Permits3
▸BISWORK PERMIT APPLICATION2
10/27/2022340869046Open ↗
12/07/2007310060983Open ↗
▸BISPLAN / WORK APPROVAL APPLICATION1
10/14/2022340869046Open ↗
▸Zoning, Tax Lot & Property Records8
▸DOB NOWZD1: DOB Zoning Diagram4
08/15/2026B01213386-P5Open ↗
08/15/2026B01213386-P2Open ↗
08/14/2026B01213386-P1Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWZoning Exhibit form (1-5)4
08/15/2026B01213386-P5Open ↗
08/15/2026B01213386-P2Open ↗
08/14/2026B01213386-P1Open ↗
Showing 3 of 4 on file for this type
▸Seals & Professional Certifications45
▸DOB NOWDPL-1: Design Professional Seal & Signature16
08/20/2026B01277819-I1Open ↗
08/17/2026B01213386-I1Open ↗
08/17/2026B01213386-P5Open ↗
Showing 3 of 16 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature11
09/02/2026B01213386-P5Open ↗
08/31/2026B01213386-S6Open ↗
08/28/2026B01213386-S4Open ↗
Showing 3 of 11 on file for this type
▸DOB NOWProgress Inspector Seal & Signature10
09/02/2026B01213386-P5Open ↗
09/02/2026B01213386-P5Open ↗
08/31/2026B01213386-S6Open ↗
Showing 3 of 10 on file for this type
▸BISAPPLICANT OWNER SIGNATURE2
09/04/2025340918948Open ↗
10/14/2022340869046Open ↗
▸BISTECHNICAL REPORT: RESPONSIBILITY-CERTIFICATION2
06/19/2009310060983Open ↗
12/04/2007310060983Open ↗
▸BISPC FULL REPORT1
12/04/2007310060983Open ↗
▸BISPROFESSIONAL CERTIFIED CHECKLIST1
12/04/2007310060983Open ↗
▸BISTECHNICAL REPORT STATEMENT OF RESPONSIBILITY1
09/04/2025340918948Open ↗
▸BISPROFESSIONAL CERTIFICATION STATEMENT FORM1
12/04/2007310060983Open ↗
▸Trade Schedules & Equipment4
▸DOB NOWDEP: Sewer Certification (Sanitary/Storm)4
08/15/2026B01213386-P5Open ↗
08/15/2026B01213386-P2Open ↗
08/14/2026B01213386-P1Open ↗
Showing 3 of 4 on file for this type
▸Safety & Tenant Protection1
▸BISTPP1: TENANT PROTECTION PLAN1
10/27/2022340869046Open ↗
▸Environmental & Asbestos14
▸DOB NOWDEP ACP-5: Asbestos Assessment Report12
08/17/2026B01213386-S4Open ↗
08/17/2026B01213386-S3Open ↗
08/17/2026B01213386-S2Open ↗
Showing 3 of 12 on file for this type
▸BISTHIS IS 'NOT AN ASBESTOS PROJECT'1
12/04/2007310060983Open ↗
▸BISASBESTOS: CERTIFICATION (DEP ACP5)1
10/14/2022340869046Open ↗
▸Energy Compliance5
▸BISTECHNICAL REPORT: ENERGY CODE - RESPONSIBILITY2
02/09/2023340869046Open ↗
10/14/2022340869046Open ↗
▸BISAS-BUILT ENERGY ANALYSIS1
02/09/2023340869046Open ↗
▸BISSOLAR TAX ABATEMENT APPLICATION1
02/10/2023340869046Open ↗
▸BISPTA4: SOLAR TAX ABATEMENT APPLICATION (PRELIMINARY)1
10/14/2022340869046Open ↗
▸Inspections & Test Reports5
▸BISTECHNICAL REPORT: RESPONSIBILITY2
02/09/2023340869046Open ↗
10/14/2022340869046Open ↗
▸DOB NOWSOIL REPORT2
08/15/2026B01213386-P4Open ↗
08/13/2026B01213386-S5Open ↗
▸DOB NOWTR4 Test Report and Plot Diagram1
08/13/2026B01213386-S5Open ↗
▸Approvals, Objections & Sign-offs4
▸BISCERTIFICATE OF OCCUPANCY/LOC: REQUEST2
02/10/2023340869046Open ↗
06/19/2009310060983Open ↗
▸BISADMINISTRATIVE OBJECTIONS1
12/04/2007310060983Open ↗
▸BISLETTERS - SUPPORTING DOCUMENTATION1
02/10/2023340869046Open ↗
▸Cost, Insurance & Ownership4
▸BISCOST AFFIDAVIT4
02/09/2023340869046Open ↗
10/14/2022340869046Open ↗
06/19/2009310060983Open ↗
Showing 3 of 4 on file for this type
▸Filing & Intake Forms3
▸BISEFILING JOB APPLICATION COVER SHEET2
09/04/2025340918948Open ↗
10/14/2022340869046Open ↗
▸BISADDITIONAL INFORMATION1
10/26/2022340869046Open ↗
▸Other Documents13
▸DOB NOWSite Survey: Initial4
08/15/2026B01213386-P5Open ↗
08/15/2026B01213386-P2Open ↗
08/14/2026B01213386-P1Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone4
08/15/2026B01213386-P5Open ↗
08/15/2026B01213386-P2Open ↗
08/14/2026B01213386-P1Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWProperty Ownership Certification4
08/15/2026B01213386-P5Open ↗
08/15/2026B01213386-P2Open ↗
08/14/2026B01213386-P1Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWAdjoining Owners Notification1
08/13/2026B01213386-S1Open ↗