← Back
Condo, residential unit, 1-3 unit building (orig. class 1)
410 WEST 20 STREET
MANHATTAN · BIN 1012585
💬 Discuss this project
1840Year Built
—Stories
R6Building Class
R7BZoning
4,420 sfGross Floor Area
3Units
Rent Stabilized6 Open Violations ▸
Condo, residential unit, 1-3 unit building (orig. class 1) · 2,227 sf lot · 1.98 FAR built · Flood zone X
Locations of Work
ArchitecturePlumbing
Floor 48p · 2 filings · 20 docs
Floor 37p · 1 filing · 20 docs
Floor 27p · 1 filing · 20 docs
Floor 17p · 1 filing · 20 docs
Cellar8p · 2 filings · 20 docs
Basement8p · 1 filing · 20 docs
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
410 W 20TH PARTNERS1107/08/2026
BLACK SQUARE BUILDERS COR103/22/2026
410 W 20 OWNERS CORP103/22/2026
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
BIALOSKY + PARTNERS ARCHITECTS506/25/2025
URBAN INTEGRATIONS206/06/2022
KAM CHIU CONSULTING ENGINEER, P.C.103/18/2022
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
MUNICIPAL BUILDING CONSULTANTS603/21/2026
PREEMPTIVE SOLUTIONS & CONSULTING L403/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
ANDAMIO SCAFFOLDING LLCGeneral Contractor207/08/2026
EXPERT FIRE SPRINKLER,LLCFire Protection107/08/2026
BLACK SQUARE BUILDERS CORPGeneral Contractor107/08/2026
SAMUEL & SONS P & H INCPlumbing107/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
RICHARD H. BALSER ENGINEE3028606/25/2025
Building Lifecycle
All (55)Filed (8)Permit Issued (5)Signed Off (4)Violation (13)Inspection (12)Objection (5)Special Inspection (8)
04/29/2026
Violation issued (HPD, open)
A
11/17/2025
Violation issued (HPD, open)
I
07/14/2025
Objection raised — Scope
06/25/2025
Filed — Alteration CO
FILING ALTERATION 1 APPLICATION TO ESTABLISH THE CERTIFICATE OF OCCUPANCY FOR RESIDENTIAL BUILDING.
M00571459-P3
06/04/2025
Violation issued (HPD, open)
A
05/14/2025
Inspection — Pass-Final CND-Occupancy Inspection
Pass
View inspection ↗
05/14/2025
Special inspection requirement — Fire-Resistance Rated Construction
WILLIAM BIALOSKY
05/14/2025
Special inspection requirement — Energy Code Compliance Inspections
WILLIAM BIALOSKY
05/14/2025
Special inspection requirement — Fire-Resistant Penetrations and Joints
Balser Richard
05/02/2025
Inspection — Fail-Final CND-Occupancy Inspection
Fail
View inspection ↗
11/22/2024
Violation issued (HPD, closed)
I
10/31/2024
Special inspection requirement — Fire-Resistant Penetrations and Joints
Balser Richard
10/31/2024
Special inspection requirement — Energy Code Compliance Inspections
WILLIAM BIALOSKY
10/31/2024
Special inspection requirement — Fire-Resistance Rated Construction
WILLIAM BIALOSKY
09/17/2024
Filed — Alteration CO
FILING ALTERATION 1 APPLICATION TO ESTABLISH THE CERTIFICATE OF OCCUPANCY FOR RESIDENTIAL BUILDING.
M00571459-P1
04/01/2024
Violation issued (HPD, open)
A
12/08/2023
Signed off — Alteration
SPRINKLER WORK IN THE CELLAR THROUGH 5th FLOOR AS PER PLANS. NO CHANGE TO USE, EGRESS, OR OCCUPANCY.
M00701543-I1
11/15/2023
Violation issued (HPD, closed)
I
07/27/2023
Inspection — Pass-Final CND-Occupancy Inspection
Pass
View inspection ↗
05/31/2023
Inspection — Pass-Final PL - Up to 3 Requested Floors
Pass
View inspection ↗
05/09/2023
Signed off — Alteration
PLUMBING WORK AS PER PLANS FILED HEREWITH. NO CHANGE TO USE, EGRESS, OR OCCUPANCY.
M00733047-I1
03/15/2023
Violation issued (HPD, open)
A
03/02/2023
Filed — Alteration
PLUMBING WORK AS PER PLANS FILED HEREWITH. NO CHANGE TO USE, EGRESS, OR OCCUPANCY.
M00733047-P1
02/27/2023
Special inspection requirement — Fire-Resistant Penetrations and Joints
Balser Richard
02/24/2023
Inspection — Pass-Final PL - Up to 3 Requested Floors
Pass
View inspection ↗
12/23/2022
Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Roughing
Certified
View inspection ↗
12/05/2022
Signed off — Alteration
M00751711-I1
12/05/2022
Signed off — Alteration
Installation of sidewalk shed as indicated on the attcahed drawings. There are no changes in use, egress or occupancy.
M00751676-I1
11/02/2022
Violation issued (HPD, closed)
I
10/20/2022
Violation issued (ECB, closed)
Construction
09/23/2022
Inspection — Certified StandPipe-SD-Fixtures-Finish-SD
Certified
View inspection ↗
09/21/2022
Inspection — Certified StandPipe-SD-Piping-Hydrostatic Test
Certified
View inspection ↗
07/16/2022
Permit issued — Sprinklers
M00701543-I1-EW-SP
07/15/2022
Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Roughing
Certified
View inspection ↗
07/15/2022
Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Underground
Certified
View inspection ↗
06/29/2022
Permit issued — Plumbing
M00733047-I1-PL
06/07/2022
Permit issued — Sidewalk Shed
M00751676-I1-SH
06/06/2022
Filed — Alteration
M00751711-I1
06/06/2022
Filed — Alteration
Installation of sidewalk shed as indicated on the attcahed drawings. There are no changes in use, egress or occupancy.
M00751676-I1
06/06/2022
Permit issued — Supported Scaffold
M00751711-I1-SF
05/13/2022
Inspection — Certified Gas-Gas-Piping-Roughing
Certified
View inspection ↗
05/13/2022
Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Roughing
Certified
View inspection ↗
05/09/2022
Filed — Alteration
PLUMBING WORK AS PER PLANS FILED HEREWITH. NO CHANGE TO USE, EGRESS, OR OCCUPANCY.
M00733047-I1
04/12/2022
Permit issued — General Construction
M00571459-I1-GC
03/18/2022
Filed — Alteration
SPRINKLER WORK IN THE CELLAR THROUGH 5th FLOOR AS PER PLANS. NO CHANGE TO USE, EGRESS, OR OCCUPANCY.
M00701543-I1
03/18/2022
Special inspection requirement — Sprinkler Systems
Balser Richard
02/16/2022
Violation issued (HPD, closed)
I
02/16/2022
Violation issued (HPD, open)
A
09/15/2021
Objection raised — Other
09/15/2021
Objection resolved — Addressed
08/25/2021
Objection raised — Zoning
08/25/2021
Objection resolved — Addressed
08/11/2021
Filed — Alteration CO
FILING ALTERATION 1 APPLICATION TO ESTABLISH THE CERTIFICATE OF OCCUPANCY FOR RESIDENTIAL BUILDING.
M00571459-I1
04/01/2021
Violation issued (HPD, closed)
A
10/25/2019
Violation issued (HPD, closed)
I
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWSprinklersSigned-offEXPERT FIRE SPRINKLER,LLC07/16/2022
DOB NOWPlumbingSigned-offSAMUEL & SONS P & H INC06/29/2022
DOB NOWSidewalk ShedSigned-offANDAMIO SCAFFOLDING LLC06/07/2022
DOB NOWSupported ScaffoldSigned-offANDAMIO SCAFFOLDING LLC06/06/2022
DOB NOWGeneral ConstructionPermit IssuedBLACK SQUARE BUILDERS COR04/12/2022
4 projects · most recent 09/02/2025
General Wiring HVAC Wiring
FiledStatusContractorScope
09/02/2025Permit IssuedINTELOGIC ELECTRIC, INC.HVAC Wiring
09/26/2023CompleteACCURATE ELEC'L CORP.General Wiring
05/23/2023CompleteACCURATE ELEC'L CORP.General Wiring
06/16/2022CompleteBOROWIDE ELECT'L CONTR'S—
▾Field Inspections (DOB CAP) — 12
DateTypeResultReport
05/14/2025Pass-Final CND-Occupancy InspectionPassView ↗
05/02/2025Fail-Final CND-Occupancy InspectionFailView ↗
07/27/2023Pass-Final CND-Occupancy InspectionPassView ↗
05/31/2023Pass-Final PL - Up to 3 Requested FloorsPassView ↗
02/24/2023Pass-Final PL - Up to 3 Requested FloorsPassView ↗
12/23/2022Certified Water and Sanitary-WS-Sanitary Piping-RoughingCertifiedView ↗
09/23/2022Certified StandPipe-SD-Fixtures-Finish-SDCertifiedView ↗
09/21/2022Certified StandPipe-SD-Piping-Hydrostatic TestCertifiedView ↗
07/15/2022Certified Water and Sanitary-WS-Sanitary Piping-RoughingCertifiedView ↗
07/15/2022Certified Water and Sanitary-WS-Sanitary Piping-UndergroundCertifiedView ↗
05/13/2022Certified Gas-Gas-Piping-RoughingCertifiedView ↗
05/13/2022Certified Water and Sanitary-WS-Sanitary Piping-RoughingCertifiedView ↗
▾Special Inspection Requirements (DOB NOW) — 8
DateRequirementInspectorRole
05/14/2025Fire-Resistance Rated ConstructionWILLIAM BIALOSKYprogress
05/14/2025Energy Code Compliance InspectionsWILLIAM BIALOSKYprogress
05/14/2025Fire-Resistant Penetrations and JointsBalser Richardspecial
10/31/2024Fire-Resistant Penetrations and JointsBalser Richardspecial
10/31/2024Energy Code Compliance InspectionsWILLIAM BIALOSKYprogress
10/31/2024Fire-Resistance Rated ConstructionWILLIAM BIALOSKYprogress
02/27/2023Fire-Resistant Penetrations and JointsBalser Richardspecial
03/18/2022Sprinkler SystemsBalser Richardspecial
▾Documents — 39 on file (BIS + DOB NOW)
▸Plans & Drawings8
▸DOB NOWPlans/Sketch8
09/02/2026M00701543-I1Request digital key ↗
09/02/2026M00751676-I1Request digital key ↗
09/02/2026M00751711-I1Request digital key ↗
Showing 3 of 8 on file for this type
▸Applications & Permits3
▸DOB NOWLPC Approval/Permit3
08/13/2026M00571459-P3Open ↗
08/13/2026M00571459-I1Open ↗
08/13/2026M00571459-P1Open ↗
▸Zoning, Tax Lot & Property Records1
▸DOB NOWHouse Number Verification: TOPO Stamp1
08/13/2026M00571459-I1Open ↗
▸Seals & Professional Certifications16
▸DOB NOWDPL-1: Design Professional Seal & Signature8
09/02/2026M00751676-I1Open ↗
09/02/2026M00751711-I1Open ↗
08/31/2026M00733047-P1Open ↗
Showing 3 of 8 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature4
08/26/2026M00571459-I1Open ↗
08/25/2026M00571459-P3Open ↗
08/25/2026M00701543-I1Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWProgress Inspector Seal & Signature4
08/26/2026M00571459-I1Open ↗
08/26/2026M00571459-I1Open ↗
08/25/2026M00571459-P3Open ↗
Showing 3 of 4 on file for this type
▸Safety & Tenant Protection4
▸DOB NOWStreet Tree Checklist3
08/13/2026M00571459-I1Open ↗
08/13/2026M00571459-P1Open ↗
08/13/2026M00571459-P3Open ↗
▸DOB NOWStreet Trees Site Plan1
08/13/2026M00571459-I1Open ↗
▸Environmental & Asbestos6
▸DOB NOWDEP ACP-5: Asbestos Assessment Report6
08/31/2026M00733047-P1Open ↗
08/31/2026M00733047-I1Open ↗
08/26/2026M00571459-P1Open ↗
Showing 3 of 6 on file for this type
▸Other Documents1
▸DOB NOWFinal Survey1
08/13/2026M00571459-I1Open ↗