| Owner | Filings | Most Recent |
|---|---|---|
| 540 W 21ST STREET HOLDINGS | 33 | 03/21/2026 |
| LEGION INVESTMENT GROUP | 30 | 08/29/2026 |
| TITAN INDUSTRIAL SERVICES | 23 | 07/08/2026 |
| SKYLINE SCAFFOLDING GROUP | 21 | 07/31/2026 |
| OWNERS REP | 14 | 07/08/2026 |
| 540 WEST STREET HOLDINGS LLC | 10 | 07/08/2026 |
| ATLANTIC FOUNDATION | 2 | 03/21/2026 |
| ASSOCIATED CONSTRUCTION MANAGMENT LLC | 1 | 03/22/2026 |
| 550 W21 STR | 1 | 03/22/2026 |
| 550 WEST 21STR | 1 | 03/22/2026 |
| Date | Price | Unit | Seller → Buyer | $/sf |
|---|---|---|---|---|
| 04/15/2024 | $87.4M | — | 540 WEST 21ST STREET HOLDINGS LLC → 550W21 OWNER LLC | $426/sf building |
| Firm | Filings | Most Recent |
|---|---|---|
| GOLDEN GLOW ARCHITECTURAL STUDIOS D | 1 | 07/20/2026 |
| RIGID STRUCTURAL DESIGN, LLC | 9 | 06/29/2026 |
| PAUL PERDEK, PROF. ENG. PLLC | 4 | 05/27/2026 |
| MJ ENGINEERING & DESIGN | 1 | 03/06/2026 |
| PLAN B ENGINEERING | 2 | 12/16/2025 |
| LOMBARDO PROFESSIONAL ENGINEERING | 2 | 11/14/2025 |
| VENTROP ENGINEERING CONSULTING GROU | 4 | 10/28/2025 |
| ANCORA ENGINEERING, PLLC | 4 | 06/24/2025 |
| STRUCTURETECH NY | 3 | 03/13/2025 |
| GACE DPC | 1 | 01/22/2025 |
| BAILEYS ENGINEERING PC | 1 | 01/17/2019 |
| LANGAN ENGINEERING, ENVIRONMENTAL, | 1 | 09/10/2018 |
| KZ ENGINEERING, P.C | 4 | 06/19/2018 |
| Representative | Filings | Most Recent |
|---|---|---|
| 4444 PPPP CORP | 2 | 03/21/2026 |
| Rigid Structural Design, LLC | 16 | 03/21/2026 |
| DOMANI CONSULTING | 11 | 03/21/2026 |
| A1 EXPEDITING SERVICE | 6 | 03/21/2026 |
| HIERARCH-E | 4 | 03/21/2026 |
| LOMBARDO PROFESSIONAL ENG DPC | 4 | 03/21/2026 |
| AE DESIGN SOLUTION | 6 | 03/21/2026 |
| SYNERGY BUILDING CONSULTANTS | 4 | 03/21/2026 |
| Firm | Trade | Roles | Most Recent |
|---|---|---|---|
| CORE SCAFFOLD SYSTEMS INC. | General Contractor | 14 | 07/08/2026 |
| ARSENAL SCAFFOLD INC | General Contractor | 14 | 07/08/2026 |
| SKYLINE SCAFFOLDING GROUP | General Contractor | 8 | 07/31/2026 |
| SUFFOLK CONSTRUCTION COMP | General Contractor | 4 | 07/08/2026 |
| CM AND ASSOCIATES CONST | General Contractor | 4 | 07/25/2026 |
| KG SPRINKLER CORP | Fire Protection | 3 | 07/08/2026 |
| CASINO DEVELOPMENT GROUP | General Contractor | 3 | 04/09/2026 |
| ROBERT LOGOZIO | Electrical | 2 | 03/21/2026 |
| JMD CONTRACTING OF NY INC | General Contractor | 2 | 04/09/2026 |
| PIMPINELLA, FRANK | Electrical | 2 | 03/21/2026 |
| KING, ARTHUR | Electrical | 2 | 03/21/2026 |
| TEAM ELECTRIC, INC | Electrical | 2 | 03/22/2026 |
| DONATO PLUMBING, INC | Plumbing | 1 | 07/08/2026 |
| NOEL NASH | Electrical | 1 | 03/21/2026 |
| STRUCTURETECH NEW YORK IN | General Contractor | 1 | 07/08/2026 |
| DONATO PLUMBING GROUP INC | Plumbing | 1 | 07/08/2026 |
| A & M ELEC'L SERVICE INC. | Electrical | 1 | 03/22/2026 |
| Agency | License # | Filings | Most Recent |
|---|---|---|---|
| LEO Y LEE ASSOCIATES | 2481 | 2 | 05/27/2026 |
| MJ ENGINEERING & DESIGN | 5546 | 1 | 03/06/2026 |
| DOMANI INSPECTION SERVICE | 843 | 4 | 10/28/2025 |
| ANCORA ENGINEERING, PLLC | 6818 | 4 | 06/24/2025 |
| Source | Work Type | Status | Applicant | Issued |
|---|---|---|---|---|
| DOB NOW | Sidewalk Shed | Permit Issued | SKYLINE SCAFFOLDING GROUP | 07/30/2026 |
| DOB NOW | General Construction | Permit Issued | CM AND ASSOCIATES CONST | 07/23/2026 |
| DOB NOW | Plumbing | Permit Issued | DONATO PLUMBING GROUP INC | 05/28/2026 |
| DOB NOW | Protection and Mechanical Methods | Permit Issued | SKYLINE SCAFFOLDING GROUP | 05/14/2026 |
| DOB NOW | Construction Fence | Permit Issued | SKYLINE SCAFFOLDING GROUP | 05/14/2026 |
| DOB NOW | Protection and Mechanical Methods | Permit Issued | SKYLINE SCAFFOLDING GROUP | 05/13/2026 |
| DOB NOW | Plumbing | Permit Issued | DONATO PLUMBING, INC | 05/06/2026 |
| DOB NOW | Mechanical Systems | Permit Issued | CM AND ASSOCIATES CONST | 05/06/2026 |
| DOB NOW | Suspended Scaffold | Permit Issued | JMD CONTRACTING OF NY INC | 03/16/2026 |
| DOB NOW | Protection and Mechanical Methods | Permit Issued | THE I-GRACE COMPANY COMMI | 03/09/2026 |
| DOB NOW | Standpipe | Permit Issued | H M SPRINKLER INC | 02/12/2026 |
| DOB NOW | Sprinklers | Permit Issued | H M SPRINKLER INC | 02/12/2026 |
| DOB NOW | Construction Fence | Permit Issued | CORE SCAFFOLD SYSTEMS INC | 11/26/2025 |
| DOB NOW | Protection and Mechanical Methods | Permit Issued | THE I-GRACE COMPANY COMMI | 11/14/2025 |
| DOB NOW | Protection and Mechanical Methods | Permit Issued | THE I-GRACE COMPANY COMMI | 11/14/2025 |
| DOB NOW | Suspended Scaffold | Permit Issued | JMD CONTRACTING OF NY INC | 11/06/2025 |
| DOB NOW | Construction Fence | Permit Issued | SKYLINE SCAFFOLDING GROUP | 09/30/2025 |
| DOB NOW | Standpipe | Permit Issued | H M SPRINKLER INC | 09/30/2025 |
| DOB NOW | Protection and Mechanical Methods | Permit Issued | SKYLINE SCAFFOLDING GROUP | 09/02/2025 |
| DOB NOW | Sidewalk Shed | Permit Issued | SKYLINE SCAFFOLDING GROUP | 08/05/2025 |
| DOB NOW | Protection and Mechanical Methods | Permit Issued | SKYLINE SCAFFOLDING GROUP | 06/17/2025 |
| DOB NOW | General Construction | Signed-off | CHRISTOPHER B. MESBAH | 05/16/2025 |
| DOB NOW | Support of Excavation | Signed-off | CHRISTOPHER B. MESBAH | 03/13/2025 |
| DOB NOW | Construction Fence | Permit Issued | STRUCTURETECH NEW YORK IN | 02/25/2025 |
| DOB NOW | Construction Fence | Permit Issued | CORE SCAFFOLD SYSTEMS INC | 12/06/2024 |
| DOB NOW | Construction Fence | Permit Issued | CORE SCAFFOLD SYSTEMS INC | 12/13/2023 |
| DOB NOW | Construction Fence | Permit Issued | CORE SCAFFOLD SYSTEMS INC | 12/20/2022 |
| DOB NOW | Sidewalk Shed | Signed-off | ARSENAL SCAFFOLD INC | 07/01/2022 |
| DOB NOW | Construction Fence | Permit Issued | CORE SCAFFOLD SYSTEMS INC | 12/23/2021 |
| DOB NOW | Sidewalk Shed | Signed-off | ARSENAL SCAFFOLD INC | 03/15/2021 |
| DOB NOW | Sidewalk Shed | Signed-off | ARSENAL SCAFFOLD INC | 03/15/2021 |
| DOB NOW | Supported Scaffold | Signed-off | ARSENAL SCAFFOLD INC | 03/08/2021 |
| DOB NOW | Supported Scaffold | Signed-off | ARSENAL SCAFFOLD INC | 03/08/2021 |
| DOB NOW | Sidewalk Shed | Signed-off | ARSENAL SCAFFOLD INC | 03/05/2021 |
| DOB NOW | Supported Scaffold | Permit Issued | ARSENAL SCAFFOLD INC | 03/05/2021 |
| DOB NOW | Supported Scaffold | Signed-off | ARSENAL SCAFFOLD INC | 03/05/2021 |
| DOB NOW | Construction Fence | Permit Issued | CORE SCAFFOLD SYSTEMS INC | 01/04/2021 |
| DOB NOW | Sidewalk Shed | Permit Issued | CORE SCAFFOLD SYSTEMS INC | 01/09/2020 |
| DOB NOW | Construction Fence | Permit Issued | SUFFOLK CONSTRUCTION COMP | 01/09/2020 |
| DOB NOW | Construction Fence | Permit Issued | CORE SCAFFOLD SYSTEMS INC | 12/31/2019 |
| Filed | Status | Contractor | Scope | Make / Model / Capacity |
|---|---|---|---|---|
| 10/28/2025 | Permit Issued | CM AND ASSOCIATES CONST | Heating and Air Conditioning Systems, Ventilation Systems |
| Filed | Status | Contractor | Scope |
|---|---|---|---|
| 10/28/2025 | Permit Issued | KG SPRINKLER CORP | 2 outlets |
| Filed | Status | Contractor | Scope |
|---|---|---|---|
| 10/28/2025 | Permit Issued | DONATO PLUMBING GROUP INC | Gas, Storm, Water/Sanitary |
| Filed | Status | Contractor | Scope |
|---|---|---|---|
| 07/17/2026 | Permit Issued | TEAM ELECTRIC, INC | General Wiring |
| 04/16/2026 | Permit Issued | JAM ELECTRICAL CORP | — |
| 02/12/2026 | Permit Issued | TEAM ELECTRIC, INC | General Wiring |
| 12/02/2025 | Permit Issued | TEAM ELECTRIC, INC | 2 meters, 2 new_meters |
| 09/03/2025 | Permit Issued | TOP SHELF ELECTRIC CORP | — |
| 05/08/2025 | Permit Issued | A & M ELEC'L SERVICE INC. | 1 meters, 1 new_meters |
| 07/26/2019 | Permit Issued | TOP SHELF ELECTRIC CORP | 1 meters, 1 new_meters |
| 06/19/2018 | Complete | NASH ELECTRIC SERVICES IN | — |
| 06/06/2018 | Complete | NASH ELECTRIC SERVICES IN | — |
| Filed | Status | Contractor | Scope |
|---|---|---|---|
| 06/24/2025 | Signed-off | CM AND ASSOCIATES CONST | 1 scope_items |
| 06/12/2025 | Signed-off | CM AND ASSOCIATES CONST | 2 scope_items |
| Filed | Status | Contractor | Scope |
|---|---|---|---|
| 11/13/2025 | Permit Issued | SKYLINE SCAFFOLDING GROUP | Sidewalk Shed |
| 09/29/2025 | Permit Issued | SKYLINE SCAFFOLDING GROUP | Fence |
| 03/13/2025 | Permit Issued | STRUCTURETECH NEW YORK IN | Fence |
| 07/20/2021 | Permit Issued | CORE SCAFFOLD SYSTEMS INC | Fence |
| 01/17/2019 | Permit Issued | CORE SCAFFOLD SYSTEMS INC | Sidewalk Shed |
| 07/03/2018 | Permit Issued | SUFFOLK CONSTRUCTION COMP | Fence |
| Filed | Status | Contractor | Scope |
|---|---|---|---|
| 05/27/2026 | Permit Issued | JMD CONTRACTING OF NY INC | Suspended Scaffold |
| Filed | Status | Contractor | Scope |
|---|---|---|---|
| 05/27/2026 | Permit Issued | JMD CONTRACTING OF NY INC | Suspended Scaffold (SC) |
| Date | Type | Result | Report |
|---|---|---|---|
| 09/09/2026 | Certified Remove/Cap - work done in accordance with code | Certified | View ↗ |
| 09/04/2026 | Certified Gas-Gas-Piping-Roughing | Certified | View ↗ |
| 09/04/2026 | Certified Water and Sanitary-WS-Sanitary Piping-Roughing | Certified | View ↗ |
| 07/09/2026 | Certified Sprinkler-SP-Fixtures-Finish | Certified | View ↗ |
| 07/08/2026 | Pass-Final PL - Underground | Pass | View ↗ |
| 07/07/2026 | Certified Sprinkler-SP-Fixtures-Finish | Certified | View ↗ |
| 05/26/2026 | Certified Sprinkler-SP-Piping Dry/Wet-Hydrostatic Test | Certified | View ↗ |
| 05/20/2026 | Fail-Final PL - Up to 3 Requested Floors | Fail | View ↗ |
| 05/18/2026 | Certified Water and Sanitary-WS-Fixtures-Finish | Certified | View ↗ |
| 05/15/2026 | Pass-Final PL - Up to 3 Requested Floors | Pass | View ↗ |
| 03/25/2026 | Certified Water and Sanitary-WS-Sanitary Piping-Underground | Certified | View ↗ |
| 03/06/2026 | Certified Remove/Cap - work done in accordance with code | Certified | View ↗ |
| 03/06/2026 | Certified Sprinkler-SP-Piping Dry/Wet-Hydrostatic Test | Certified | View ↗ |
| 12/22/2025 | Certified StandPipe - SD - Alarm Sys 64/09 - Finish | Certified | View ↗ |
| 12/22/2025 | Certified StandPipe - SD - Hydrostatic 63/09 Test (Initial 75 Feet) | Certified | View ↗ |
| 10/23/2025 | Certified Water and Sanitary-WS-Sanitary Piping-Roughing | Certified | View ↗ |
| Date | Requirement | Inspector | Role |
|---|---|---|---|
| 07/16/2026 | Final | JOHN MCMONAGLE | progress |
| 05/27/2026 | Post-installed Anchors | Leo Lee | special |
| 05/20/2026 | Post-installed Anchors | Leo Lee | special |
| 09/12/2025 | HVAC-R and service water piping design and insulation | JOHN MCMONAGLE | energy_progress |
| 09/12/2025 | Maintenance information | JOHN MCMONAGLE | energy_progress |
| 09/12/2025 | HVAC-R and service water heating system controls | JOHN MCMONAGLE | energy_progress |
| 09/12/2025 | HVAC-R and service water heating equipment | JOHN MCMONAGLE | energy_progress |
| 08/27/2025 | Fire-Resistant Penetrations and Joints | JOHN MCMONAGLE | special |
| 08/27/2025 | Private On-Site Storm Water Disposal Systems-, and Detention Facilities, Installation | JOHN MCMONAGLE | special |
| 08/19/2025 | Standpipe Systems | JOHN MCMONAGLE | special |
| 06/23/2025 | Structural Stability – Alterations of existing buildings | Gregory Moormann | special |
| 06/13/2025 | Structural Stability – Alterations of existing buildings | Gregory Moormann | special |
| 06/13/2025 | Demolition | Gregory Moormann | special |
| 06/13/2025 | Final | Gregory Moormann | progress |
| 06/10/2025 | Structural Stability – Alterations of existing buildings | Gregory Moormann | special |
| 07/07/2021 | Final | — | progress |
| 03/18/2021 | Final | Karol Zdancewicz | progress |