← Back
Elevator apt, semi-fireproof without stores
51 EAST 73 STREET
MANHATTAN · Upper East Side-Carnegie Hill · BIN 1041500
💬 Discuss this project
1886Year Built
5Stories
D1Building Class
R8BZoning
12,321 sfGross Floor Area
20Units
Rent Stabilized76 Open Violations 65 unresolved · 11 paperwork only ▸
Elevator apt, semi-fireproof without stores · Owner of record: CHAI 73 LLC · 3,576 sf lot · 3.45 FAR built · Flood zone X
Locations of Work
ArchitectureStructuralElectricalMechanicalPlumbingFire ProtectionEquipmentGeneral
Permit Issued — active, not yet Signed-off
RoofUnder Construction100p · 1 filing · 20 docs
Floor 4Under Construction123p · 2 filings · 20 docs
Floor 3Under Construction123p · 2 filings · 20 docs
Floor 2Under Construction125p · 2 filings · 20 docs
Floor 1Under Construction122p · 2 filings · 20 docs
CellarUnder Construction110p · 3 filings · 20 docs
BasementUnder Construction122p · 1 filing · 20 docs
Sub-Basement1p · 1 filing · 4 docs
Site & exteriorUnder Construction59p · 3 filings · 20 docs
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
CHAI 735809/13/2026
KINGS GROUP NY2308/07/2026
J G CONSTRUCTION SRVCS107/08/2026
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
12/22/2021$25.0M—Private party → CHAI 73 LLC$2,029/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
BILOW ENGINEERING, LLC407/06/2026
ALWAYS FAST SERVICES CORP106/18/2026
D'ANTONIO CONSULTING ENGINEERS412/26/2025
SILMAN412/02/2025
MICHAEL HOUSE ARCHITECT, PLLC308/25/2025
KMA DESIGNS LLC105/21/2025
ASHRAF CORP312/16/2024
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
NEXUS CONSULTING NYC, INC1403/21/2026
KMA DESIGNS LLC803/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
KINGS GROUP NY CORPGeneral Contractor1808/07/2026
KMN BUILDERS INCGeneral Contractor1304/09/2026
TRIBORO CONSTR ASSOC INCGeneral Contractor1107/08/2026
NEW RELIANT CONSTRUCTIONGeneral Contractor508/30/2026
COMPOSITE FABRICATION ANDGeneral Contractor407/08/2026
ZHENG LIElectrical203/21/2026
KJK ELECTRIC INCElectrical203/21/2026
ALEXANDER EUGENEElectrical103/21/2026
QMB PLUMBING & HEATING INCPlumbing107/08/2026
BABICH, ETTOREElectrical103/21/2026
CADOGAN, JOELElectrical103/21/2026
CLIFFORD, NICHOLASElectrical103/21/2026
KJK ELECTRIC INCElectrical103/22/2026
QMB PLUMBING & HTG INCFire Protection107/08/2026
J & G CONSTRUCTION SVCSGeneral Contractor107/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
ANS CONSULTANTS, INC.1768207/06/2026
BILOW ENGINEERING LLC4095107/06/2026
STUDIO NYANDAK ARCHITECTU8378807/06/2026
D'ANTONIO CONSULTING ENGI931412/26/2025
MICHAEL HOUSE ARCHITECT,7910208/25/2025
Building Lifecycle
All (196)Filed (20)Permit Issued (34)Signed Off (2)Violation (60)Objection (50)Special Inspection (30)
08/28/2026
Permit issued — General Construction
M07996984-I1-GC
08/27/2026
Permit issued — Structural
M07996984-S2-GC-CX
08/06/2026
Permit issued — Supported Scaffold
M01033715-I1-SH
07/31/2026
Special inspection requirement — Concrete - Cast-In-Place
TENZIN NYANDAK
07/31/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
TENZIN NYANDAK
07/31/2026
Special inspection requirement — Subgrade Inspections
TENZIN NYANDAK
07/31/2026
Special inspection requirement — Excavations - Sheeting, Shoring, and Bracing
ATULKUMAR SHAH, PE
07/31/2026
Special inspection requirement — Structural Steel - Welding
TENZIN NYANDAK
07/30/2026
Objection raised — Other
07/20/2026
Objection resolved — Addressed
07/16/2026
Objection raised — Other
07/06/2026
Filed — Alteration CO
INSTALLATION OF NEW SPRINKLER SYSTEM. NO CHANGE TO USE, EGRESS OR OCCUPANCY.
M07996984-P6
07/06/2026
Filed — Alteration CO
INSTALLATION OF NEW SPRINKLER SYSTEM. NO CHANGE TO USE, EGRESS OR OCCUPANCY.
M07996984-S7
07/06/2026
Special inspection requirement — Subsurface Conditions – Fill Placement & In-Place Density
JONATHAN BILOW
07/06/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
07/06/2026
Special inspection requirement — Underpinning
JONATHAN BILOW
07/06/2026
Special inspection requirement — Concrete - Cast-In-Place
07/02/2026
Special inspection requirement — Footing and Foundation
JONATHAN BILOW
07/02/2026
Special inspection requirement — Final
JONATHAN BILOW
06/24/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
TENZIN NYANDAK
06/24/2026
Special inspection requirement — Structural Steel - Welding
TENZIN NYANDAK
06/24/2026
Special inspection requirement — Subgrade Inspections
TENZIN NYANDAK
06/24/2026
Special inspection requirement — Concrete - Cast-In-Place
TENZIN NYANDAK
06/24/2026
Special inspection requirement — Excavations - Sheeting, Shoring, and Bracing
ATULKUMAR SHAH, PE
06/18/2026
Filed — Alteration
PROPOSED INSTALLATION OF TEMPORARY PIPE SCAFFOLD AS PER PLANS. WORK SHALL COMPLY WITH CHAPTER #33 OF 2022 THE NYC BUILDING CODE. NO CHANGE IN USE, OCCUPANCY, OR EGRESS UNDER THIS APPLICATION.
M01404202-I1
06/18/2026
Permit issued — Supported Scaffold
M01404202-I1-SF
05/26/2026
Permit issued — Structural
M07996984-S2-GC-CX
05/26/2026
Permit issued — General Construction
M07996984-I1-GC
05/21/2026
Permit issued — Construction Fence
M01033715-S2-FN
05/19/2026
Permit issued — Sidewalk Shed
M01033715-I1-SH
05/04/2026
Objection resolved — Resolved
05/04/2026
Objection resolved — Resolved
04/29/2026
Violation issued (HPD, open)
A
04/20/2026
Permit issued — Sprinklers
M07996984-S5-EW-SP
04/14/2026
Permit issued — Mechanical Systems
M07996984-S3-MS
04/09/2026
Permit issued — General Construction
M07996984-I1-GC
03/23/2026
Permit issued — Foundation
M07996984-S2-GC-CX
02/18/2026
Permit issued — Mechanical Systems
M07996984-S3-MS
01/14/2026
Permit issued — Plumbing
M07996984-S4-PL
01/07/2026
Special inspection requirement — Sprinkler Systems
GAETANO D'ANTONIO
01/05/2026
Objection resolved — Addressed
12/29/2025
Objection raised — Zoning
12/26/2025
Filed — Alteration CO
INSTALLATION OF NEW SPRINKLER SYSTEM. NO CHANGE TO USE, EGRESS OR OCCUPANCY.
M07996984-P5
12/26/2025
Objection resolved — Addressed
12/26/2025
Objection resolved — Addressed
12/17/2025
Objection resolved — Addressed
12/17/2025
Objection resolved — Addressed
12/17/2025
Objection resolved — Addressed
12/17/2025
Objection resolved — Addressed
12/17/2025
Objection resolved — Addressed
12/15/2025
Objection raised — Admin
12/08/2025
Objection raised — Structural
12/08/2025
Objection raised — Structural
12/08/2025
Objection raised — Admin
12/08/2025
Objection raised — Structural
12/05/2025
Objection raised — Zoning
12/05/2025
Objection raised — Admin
12/04/2025
Permit issued — Protection and Mechanical Methods
M01033715-S1-PMM
12/02/2025
Filed — Alteration CO
INSTALLATION OF NEW SPRINKLER SYSTEM. NO CHANGE TO USE, EGRESS OR OCCUPANCY.
M07996984-P4
11/26/2025
Special inspection requirement — Metering
GAETANO D'ANTONIO
Latest 60 of 196 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWGeneral ConstructionPermit IssuedNEW RELIANT CONSTRUCTION08/28/2026
DOB NOWStructuralPermit IssuedNEW RELIANT CONSTRUCTION08/27/2026
DOB NOWSupported ScaffoldPermit IssuedKINGS GROUP NY CORP08/06/2026
DOB NOWSupported ScaffoldPermit IssuedJ & G CONSTRUCTION SVCS06/18/2026
DOB NOWStructuralPermit IssuedNEW RELIANT CONSTRUCTION05/26/2026
DOB NOWGeneral ConstructionPermit IssuedNEW RELIANT CONSTRUCTION05/26/2026
DOB NOWConstruction FencePermit IssuedKINGS GROUP NY CORP05/21/2026
DOB NOWSidewalk ShedPermit IssuedKINGS GROUP NY CORP05/19/2026
DOB NOWSprinklersPermit IssuedQMB PLUMBING & HTG INC04/20/2026
DOB NOWMechanical SystemsPermit IssuedNEW RELIANT CONSTRUCTION04/14/2026
DOB NOWGeneral ConstructionPermit IssuedTRIBORO CONSTR ASSOC INC04/09/2026
DOB NOWFoundationPermit IssuedTRIBORO CONSTR ASSOC INC03/23/2026
DOB NOWMechanical SystemsPermit IssuedTRIBORO CONSTR ASSOC INC02/18/2026
DOB NOWPlumbingPermit IssuedQMB PLUMBING & HEATING INC01/14/2026
DOB NOWProtection and Mechanical MethodsPermit IssuedKINGS GROUP NY CORP12/04/2025
DOB NOWConstruction FencePermit IssuedKINGS GROUP NY CORP05/21/2025
DOB NOWFoundationPermit IssuedTRIBORO CONSTR ASSOC INC05/19/2025
DOB NOWSupported ScaffoldPermit IssuedKINGS GROUP NY CORP05/19/2025
DOB NOWSupported ScaffoldPermit IssuedKINGS GROUP NY CORP05/16/2025
DOB NOWStructuralPermit IssuedTRIBORO CONSTR ASSOC INC03/09/2025
DOB NOWSupport of ExcavationPermit IssuedTRIBORO CONSTR ASSOC INC03/06/2025
DOB NOWGeneral ConstructionPermit IssuedTRIBORO CONSTR ASSOC INC03/06/2025
DOB NOWSupport of ExcavationPermit IssuedTRIBORO CONSTR ASSOC INC02/28/2025
DOB NOWGeneral ConstructionPermit IssuedTRIBORO CONSTR ASSOC INC02/28/2025
DOB NOWFoundationPermit IssuedKMN BUILDERS INC02/03/2025
DOB NOWSupport of ExcavationPermit IssuedKMN BUILDERS INC01/30/2025
DOB NOWGeneral ConstructionPermit IssuedKMN BUILDERS INC01/30/2025
DOB NOWProtection and Mechanical MethodsPermit IssuedKINGS GROUP NY CORP12/17/2024
DOB NOWGeneral ConstructionPermit IssuedKMN BUILDERS INC06/03/2024
DOB NOWSupport of ExcavationPermit IssuedKMN BUILDERS INC06/03/2024
DOB NOWSupported ScaffoldPermit IssuedKINGS GROUP NY CORP05/23/2024
DOB NOWSidewalk ShedPermit IssuedKINGS GROUP NY CORP05/23/2024
DOB NOWGeneral ConstructionSigned-offCOMPOSITE FABRICATION AND08/01/2023
DOB NOWGeneral ConstructionSigned-offCOMPOSITE FABRICATION AND12/07/2022
BISPLISSUEDCALRAY GAS HEAT CORP06/19/2013
BISOTISSUEDCSC OF NY INC06/18/2013
BISBLISSUEDCALRAY GAS HEAT CORP03/22/2005
BISPLISSUEDCALRAY GAS HEAT CORPORATION03/22/2005
BISOTISSUEDNISHAN BALIKJIAN P.E.P.C10/31/1996
BISPLISSUEDM & A PLG & HTG08/16/1993
+ 1 more permits on file
1 project · most recent 07/06/2026
Heating and Air Conditioning Systems
FiledStatusContractorScopeMake / Model / Capacity
07/06/2026Permit IssuedNEW RELIANT CONSTRUCTIONHeating and Air Conditioning Systems
Heat / Cool
Mitsubishi Electric MXZ-SM48NLHZ 54,000 BTU · Condensing Unit ×2
MXZ-SM60NL 66,000 BTU · Condensing Unit ×2
SUZ-AK36NLHZ 40,000 BTU · Condensing Unit ×1
SUZ-AK48NLHZ 60,000 BTU · Condensing Unit ×1
1 project · most recent 07/06/2026
Sprinkler System
FiledStatusContractorScope
07/06/2026Permit IssuedQMB PLUMBING & HTG INCSprinkler System
1 project · most recent 07/06/2026
Gas Water/Sanitary
FiledStatusContractorScope
07/06/2026Permit IssuedQMB PLUMBING & HEATING INGas, Water/Sanitary
3 projects · most recent 12/19/2025
General Wiring
FiledStatusContractorScope
12/19/2025Permit IssuedKJK ELECTRIC INCGeneral Wiring
12/05/2025Permit IssuedKJK ELECTRIC INC—
05/19/2025Permit IssuedHIGH QUALITY ELEC.OF NYC—
1 project · most recent 07/06/2026
Steel Concrete Masonry Wood
FiledStatusContractorScope
07/06/2026Permit IssuedNEW RELIANT CONSTRUCTIONSteel, Concrete, Masonry, Wood
2 projects · most recent 06/18/2026
Scaffold Fence Sidewalk Shed
FiledStatusContractorScope
06/18/2026Permit IssuedJ & G CONSTRUCTION SVCSScaffold
05/21/2025Permit IssuedKINGS GROUP NY CORPFence, Scaffold, Sidewalk Shed
▾Special Inspection Requirements (DOB NOW) — 85
DateRequirementInspectorRole
07/31/2026Concrete - Cast-In-PlaceTENZIN NYANDAKspecial
07/31/2026Excavations - Sheeting, Shoring, and BracingATULKUMAR SHAH, PEspecial
07/31/2026Structural Steel - WeldingTENZIN NYANDAKspecial
07/31/2026Structural Stability – Alterations of existing buildingsTENZIN NYANDAKspecial
07/31/2026Subgrade InspectionsTENZIN NYANDAKspecial
07/06/2026UnderpinningJONATHAN BILOWspecial
07/06/2026Concrete - Cast-In-Place—special
07/06/2026Subsurface Conditions – Fill Placement & In-Place DensityJONATHAN BILOWspecial
07/06/2026Structural Stability – Alterations of existing buildings—special
07/02/2026Footing and FoundationJONATHAN BILOWprogress
07/02/2026FinalJONATHAN BILOWprogress
06/24/2026Subgrade InspectionsTENZIN NYANDAKspecial
06/24/2026Structural Stability – Alterations of existing buildingsTENZIN NYANDAKspecial
06/24/2026Excavations - Sheeting, Shoring, and BracingATULKUMAR SHAH, PEspecial
06/24/2026Concrete - Cast-In-PlaceTENZIN NYANDAKspecial
06/24/2026Structural Steel - WeldingTENZIN NYANDAKspecial
01/07/2026Sprinkler SystemsGAETANO D'ANTONIOspecial
11/26/2025MeteringGAETANO D'ANTONIOenergy_progress
11/25/2025HVAC-R and service water heating equipmentGAETANO D'ANTONIOenergy_progress
11/25/2025HVAC-R and service water heating system controlsGAETANO D'ANTONIOenergy_progress
11/25/2025HVAC-R and service water piping design and insulationGAETANO D'ANTONIOenergy_progress
11/17/2025Concrete - Cast-In-PlaceTENZIN NYANDAKspecial
11/17/2025Construction Operations Influencing Adjacent StructuresTENZIN NYANDAKspecial
11/17/2025MasonryTENZIN NYANDAKspecial
11/17/2025Post-installed AnchorsTENZIN NYANDAKspecial
Latest 25 of 85.
▾Documents — 163 on file (BIS + DOB NOW)
▸Plans & Drawings20
▸DOB NOWPlans/Sketch20
09/02/2026M00756655-I1Request digital key ↗
09/01/2026M07996984-S5Request digital key ↗
09/01/2026M07996984-P5Request digital key ↗
Showing 3 of 20 on file for this type
▸Applications & Permits15
▸DOB NOWLPC Approval/Permit12
08/15/2026M07996984-P3Open ↗
08/14/2026M07996984-P6Open ↗
08/13/2026M07996984-S1Open ↗
Showing 3 of 12 on file for this type
▸BISWORK PERMIT APPLICATION2
06/25/2013121571183Open ↗
06/21/2013121571183Open ↗
▸BISPLAN / WORK APPROVAL APPLICATION1
04/01/2013121571183Open ↗
▸Zoning, Tax Lot & Property Records2
▸DOB NOWZD1: DOB Zoning Diagram2
08/15/2026M07996984-P3Open ↗
08/13/2026M07996984-I1Open ↗
▸Seals & Professional Certifications94
▸DOB NOWSpecial Inspector Seal & Signature51
09/23/2026M07996984-S3Open ↗
09/23/2026M07996984-S3Open ↗
09/23/2026M07996984-S3Open ↗
Showing 3 of 51 on file for this type
▸DOB NOWProgress Inspector Seal & Signature21
09/23/2026M07996984-S3Open ↗
09/23/2026M07996984-S3Open ↗
09/23/2026M07996984-S3Open ↗
Showing 3 of 21 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature20
09/01/2026M07996984-I1Open ↗
09/01/2026M07996984-P5Open ↗
09/01/2026M07996984-S7Open ↗
Showing 3 of 20 on file for this type
▸BISPROFESSIONAL CERTIFIED CHECKLIST1
04/01/2013121571183Open ↗
▸BISPROFESSIONAL CERTIFICATION STATEMENT FORM1
04/01/2013121571183Open ↗
▸Trade Schedules & Equipment2
▸BISSCHEDULE B - PLUMBING1
04/01/2013121571183Open ↗
▸BISSELF-CERT PLUMBING NOTICE1
02/11/2014121571183Open ↗
▸Safety & Tenant Protection2
▸DOB NOWStreet Tree Checklist2
08/13/2026M07996984-P3Open ↗
08/13/2026M07996984-I1Open ↗
▸Environmental & Asbestos9
▸DOB NOWDEP ACP-20/ACP-21: Asbestos Project Conditional Completion Form/Asbestos Project Completion Form8
09/01/2026M07996984-S5Open ↗
08/15/2026M07996984-S7Open ↗
08/15/2026M07996984-I1Open ↗
Showing 3 of 8 on file for this type
▸BISASBESTOS EXEMPTION CERTIFICATION LETTER1
04/01/2013121571183Open ↗
▸Approvals, Objections & Sign-offs1
▸BISADMINISTRATIVE OBJECTIONS1
04/01/2013121571183Open ↗
▸Cost, Insurance & Ownership1
▸BISCOST AFFIDAVIT1
04/01/2013121571183Open ↗
▸Filing & Intake Forms1
▸BISEFILING COVER SHEET1
04/01/2013121571183Open ↗
▸Other Documents16
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone6
08/13/2026M07996984-I1Open ↗
08/13/2026M07996984-P2Open ↗
08/13/2026M07996984-P4Open ↗
Showing 3 of 6 on file for this type
▸DOB NOWPlot Diagram5
08/15/2026M07996984-S7Open ↗
08/14/2026M07996984-P6Open ↗
08/13/2026M07996984-I1Open ↗
Showing 3 of 5 on file for this type
▸DOB NOWProperty Ownership Certification2
08/15/2026M07996984-I1Open ↗
08/15/2026M07996984-P3Open ↗
▸DOB NOWSite Survey: Initial2
08/13/2026M07996984-I1Open ↗
08/13/2026M07996984-P3Open ↗
▸DOB NOWAdjoining Owners Notification1
08/13/2026M07996984-S1Open ↗