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BuildNYC
Walk-up cooperative
343 WEST 21ST STREET
MANHATTAN · BIN 1013290
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1848Year Built
4Stories
C6Building Class
R7BZoning
4,875 sfGross Floor Area
8Units
18 Active Violations 1 likely answered ▸
Walk-up cooperative · Owner of record: Chelsea Cottage · 1,480 sf lot · 3.29 FAR built · Flood zone X
Locations of Work
Mechanical
Names shown beside floors are taken automatically from the text of filed documents and may be incomplete or wrong.
Permit Issued — active, not yet Signed-off
RoofStructural work and roof membraneUnder Construction1 filing · 10 docs
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
Ballroom Barks510/04/2026
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
TSS Engineers109/24/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
Green Home General ContGeneral Contractor110/03/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
TSS Engineers4492109/24/2026
Building Lifecycle
All (37)Filed (1)Permit Issued (1)Violation (28)Special Inspection (7)
10/02/2026
Permit issued — Mechanical Systems
M01459549-I1-GC-CX
09/24/2026
Filed — Alteration
REPLACEMENT OF THE CHIMNEY AT THE ROOF LEVEL ONLY INCLUDING MINOR MASONRY WORK, LINER REPLACEMENT, WITH ASSOCIATED MECHANICAL AND STRUCTURAL WORK. THE EXISTING MEMBRANE ON THE ROOF FLOOR IS TO REMAIN. NO CHANGE TO THE USE, EGRESS, OR OCCUPANCY.
M01459549-I1
09/21/2026
Special inspection requirement — Tenant Protection Plan Compliance
bassam (sam) rimawi
09/21/2026
Special inspection requirement — Masonry
bassam (sam) rimawi
09/21/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
bassam (sam) rimawi
09/21/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
bassam (sam) rimawi
09/14/2026
Special inspection requirement — Final
bassam (sam) rimawi
09/14/2026
Special inspection requirement — Chimneys and vents
bassam (sam) rimawi
09/14/2026
Special inspection requirement — Mechanical Systems
bassam (sam) rimawi
02/19/2021
Violation issued (ECB, closed)
Plumbing
11/08/2019
Violation issued (DOB, open)
V-DOB VIOLATION - ACTIVE
03/27/2018
Violation issued (HPD, open)
A
03/27/2018
Violation issued (HPD, open)
A
03/27/2018
Violation issued (HPD, open)
B
03/27/2018
Violation issued (HPD, open)
A
03/04/2016
Violation issued (ECB, closed)
Unknown
03/16/2015
Violation issued (HPD, open)
A
03/16/2015
Violation issued (HPD, open)
B
12/10/2014
Violation issued (HPD, open)
A
12/10/2014
Violation issued (HPD, open)
B
12/10/2014
Violation issued (HPD, open)
B
05/12/2014
Violation issued (HPD, open)
B
05/12/2014
Violation issued (HPD, open)
B
05/12/2014
Violation issued (HPD, open)
B
12/30/2011
Violation issued (ECB, closed)
Construction
07/01/2010
Violation issued (HPD, open)
B
07/01/2010
Violation issued (HPD, open)
B
07/01/2010
Violation issued (HPD, open)
B
07/01/2010
Violation issued (HPD, open)
C
07/01/2010
Violation issued (HPD, open)
B
07/01/2010
Violation issued (HPD, open)
B
01/31/2005
Violation issued (DOB, closed)
V*-DOB VIOLATION - DISMISSED
02/13/2004
Violation issued (DOB, closed)
V*-DOB VIOLATION - DISMISSED
08/29/1995
Violation issued (DOB, closed)
V*-DOB VIOLATION - DISMISSED
03/18/1994
Violation issued (DOB, closed)
V*-DOB VIOLATION - DISMISSED
03/18/1993
Violation issued (DOB, closed)
V*-DOB VIOLATION - DISMISSED
03/18/1993
Violation issued (DOB, closed)
V*-DOB VIOLATION - DISMISSED
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWMechanical SystemsPermit IssuedGreen Home General Cont10/02/2026
BISPLISSUEDOrbit Plumbing & Heating06/07/2019
BISOTISSUEDHome Design Group NYC05/24/2019
1 project · most recent 09/24/2026
Ventilation Systems
FiledStatusContractorScopeMake / Model / Capacity
09/24/2026Permit IssuedGreen Home General ContVentilation Systems
Ventilation
1 project · most recent 09/24/2026
Concrete Masonry
FiledStatusContractorScope
09/24/2026Permit IssuedGreen Home General ContConcrete, Masonry
▾Special Inspection Requirements (DOB NOW) — 7
DateRequirementInspectorRole
09/21/2026Tenant Protection Plan Compliancebassam (sam) rimawispecial
09/21/2026Masonrybassam (sam) rimawispecial
09/21/2026Structural Stability – Alterations of existing buildingsbassam (sam) rimawispecial
09/21/2026Fire-Resistant Penetrations and Jointsbassam (sam) rimawispecial
09/14/2026Finalbassam (sam) rimawiprogress
09/14/2026Chimneys and ventsbassam (sam) rimawispecial
09/14/2026Mechanical Systemsbassam (sam) rimawispecial
▾Documents — 59 on file (BIS + DOB NOW)
▸Plans & Drawings1
▸DOB NOWPlans/Sketch1
10/04/2026M01459549-I1Request digital key ↗
▸Applications & Permits10
▸BISPLAN / WORK APPROVAL APPLICATION7
12/31/2019123837312Open ↗
12/27/2019123837312Open ↗
10/29/2019123837312Open ↗
Showing 3 of 7 on file for this type
▸BISWORK PERMIT APPLICATION3
06/10/2019123837312Open ↗
05/24/2019123837312Open ↗
05/24/2019123837312Open ↗
▸Seals & Professional Certifications12
▸DOB NOWSpecial Inspector Seal & Signature6
10/03/2026M01459549-I1Open ↗
10/03/2026M01459549-I1Open ↗
10/03/2026M01459549-I1Open ↗
Showing 3 of 6 on file for this type
▸BISTECHNICAL REPORT: RESPONSIBILITY/CERTIFICATION4
01/29/2020123837312Open ↗
01/24/2020123837312Open ↗
05/14/2019123837312Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature1
10/03/2026M01459549-I1Open ↗
▸DOB NOWProgress Inspector Seal & Signature1
10/03/2026M01459549-I1Open ↗
▸Trade Schedules & Equipment6
▸BISSCHEDULE B - PLUMBING/SPRINKLER/STANDPIPE6
12/31/2019123837312Open ↗
12/27/2019123837312Open ↗
10/29/2019123837312Open ↗
Showing 3 of 6 on file for this type
▸Safety & Tenant Protection2
▸BISTenant Protection Plan and Notes2
05/08/2019123837312Open ↗
04/04/2019123837312Open ↗
▸Environmental & Asbestos2
▸BISASBESTOS: CERTIFICATION (DEP ACP5)1
05/14/2019123837312Open ↗
▸DOB NOWDEP ACP-5: Asbestos Assessment Report1
10/03/2026M01459549-I1Open ↗
▸Energy Compliance6
▸BISTECHNICAL REPORT: ENERGY CODE PROGRESS INSPS4
01/29/2020123837312Open ↗
01/24/2020123837312Open ↗
05/14/2019123837312Open ↗
Showing 3 of 4 on file for this type
▸BISAS-BUILT ENERGY ANALYSIS2
01/29/2020123837312Open ↗
01/24/2020123837312Open ↗
▸Inspections & Test Reports2
▸BISINSPECTION REPORT - SUPPORTING DOCUMENTATION2
01/29/2020123837312Open ↗
01/24/2020123837312Open ↗
▸Approvals, Objections & Sign-offs5
▸BISLETTERS - SUPPORTING DOCUMENTATION3
01/29/2020123837312Open ↗
01/24/2020123837312Open ↗
01/24/2020123837312Open ↗
▸BISCERTIFICATE OF OCCUPANCY/LOC: REQUEST2
01/29/2020123837312Open ↗
01/24/2020123837312Open ↗
▸Cost, Insurance & Ownership3
▸BISCOST AFFIDAVIT3
01/29/2020123837312Open ↗
01/24/2020123837312Open ↗
04/04/2019123837312Open ↗
▸Filing & Intake Forms8
▸BISBOROUGH INTAKE FORM5
01/29/2020123837312Open ↗
01/24/2020123837312Open ↗
12/27/2019123837312Open ↗
Showing 3 of 5 on file for this type
▸BISADDITIONAL INFORMATION2
01/16/2020123837312Open ↗
05/08/2019123837312Open ↗
▸BISEFILING COVER SHEET1
04/04/2019123837312Open ↗
▸Other Documents2
▸BISSAFETY MONITORING PLAN1
01/29/2020123837312Open ↗
▸BISUnknown1
11/04/2019123837312Open ↗