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Condo, residential unit, 1-3 unit building (orig. class 1)
410 WEST 20TH STREET
MANHATTAN · BIN 1012585
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1840Year Built
—Stories
R6Building Class
R7BZoning
4,420 sfGross Floor Area
3Units
Rent Stabilized6 Active 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
ArchitectureElectricalMechanicalPlumbingFire ProtectionGeneral
Names shown beside floors are taken automatically from the text of filed documents and may be incomplete or wrong.
Floor 5Sprinkler work, cellar through 5th floor3p · 1 filing · 4 docs
Floor 4Sprinkler work, cellar through 5th floor15p · 2 filings · 20 docs
Floor 3Sprinkler work, cellar through 5th floor21p · 3 filings · 20 docs
Floor 2Sprinkler work, cellar through 5th floor22p · 3 filings · 20 docs
Floor 1Sprinkler work, cellar through 5th floor21p · 3 filings · 20 docs
CellarSprinkler work, cellar through 5th floor22p · 3 filings · 20 docs
Basement13p · 1 filing · 20 docs
Sub-BasementSprinkler work, cellar through 5th floor9p · 2 filings · 12 docs
Site & exteriorInstallation of sidewalk shed8p · 2 filings · 4 docs
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
410 W 20th Partners1107/08/2026
410 W 20 Owners103/22/2026
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
Bialosky + Partners Architects506/25/2025
Urban Integrations206/06/2022
Kam Chiu Consulting Engineering103/18/2022
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
Municipal Building Consultants603/21/2026
Preemptive Solutions & Consulting403/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
Andamio ScaffoldingScaffold207/08/2026
Black Square BuildersGeneral Contractor107/08/2026
Expert Fire SprinklerFire Protection107/08/2026
Samuel & Sons P & HPlumbing107/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
Richard H. Balser Engineering3028606/25/2025
Building Lifecycle
All (51)Filed (8)Permit Issued (5)Signed Off (4)Violation (13)Inspection (7)Objection (5)Special Inspection (9)
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 ↗
05/09/2023
Signed off — Alteration
PLUMBING WORK AS PER PLANS FILED HEREWITH. NO CHANGE TO USE, EGRESS, OR OCCUPANCY.
M00733047-I1
05/03/2023
Inspection — Certified Sprinkler-SP-Fixtures-Finish
Certified
View inspection ↗
03/15/2023
Violation issued (HPD, open)
A
03/03/2023
Special inspection requirement — Fire-Resistant Penetrations and Joints
Balser Richard
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
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
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
05/09/2022
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 Sprinkler07/16/2022
DOB NOWPlumbingSigned-offSamuel & Sons P & H06/29/2022
DOB NOWSidewalk ShedSigned-offAndamio Scaffolding06/07/2022
DOB NOWSupported ScaffoldSigned-offAndamio Scaffolding06/06/2022
DOB NOWGeneral ConstructionPermit IssuedBlack Square Builders04/12/2022
4 projects · most recent 09/02/2025
General Wiring HVAC Wiring
FiledStatusContractorScope
09/02/2025Permit IssuedIntelogic ElectricHVAC Wiring
09/26/2023CompleteAccurate ElectricalGeneral Wiring
05/23/2023CompleteAccurate ElectricalGeneral Wiring
06/16/2022CompleteBorowide Elect'l Contractors—
▾Field Inspections (DOB CAP) — 7
DateTypeResultReport
05/14/2025Pass-Final CND-Occupancy InspectionPassView ↗
05/02/2025Fail-Final CND-Occupancy InspectionFailView ↗
07/27/2023Pass-Final CND-Occupancy InspectionPassView ↗
05/03/2023Certified Sprinkler-SP-Fixtures-FinishCertifiedView ↗
12/23/2022Certified Water and Sanitary-WS-Sanitary Piping-RoughingCertifiedView ↗
07/15/2022Certified Water and Sanitary-WS-Sanitary Piping-RoughingCertifiedView ↗
07/15/2022Certified Water and Sanitary-WS-Sanitary Piping-UndergroundCertifiedView ↗
▾Special Inspection Requirements (DOB NOW) — 9
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
03/03/2023Fire-Resistant Penetrations and JointsBalser Richardspecial
02/27/2023Fire-Resistant Penetrations and JointsBalser Richardspecial
03/18/2022Sprinkler SystemsBalser Richardspecial
▾Documents — 40 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 Certifications17
▸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 & Signature5
10/08/2026M00733047-I1Open ↗
08/26/2026M00571459-I1Open ↗
08/25/2026M00571459-P3Open ↗
Showing 3 of 5 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 ↗