| Project | Address | Type | Status | Filed | Latest permit | On the project | Description |
|---|---|---|---|---|---|---|---|
| M01295741 ↗ | 354 LEXINGTON AVENUE MANHATTAN | Alteration | Signed-off | 10/23/2025 | 01/06/2026 | Design CONCESSI ENGINEERING, P.C. Contractor WHALEN CONSTRUCTION, INC Filer WHIDDEN SILVER INC. | Modify plumbing system to add connection for coffee maker on 5th floor Board Room and replace restroom fixtures on the 6th floor. Modificat… |
| M00761337 ↗ | 420 LEXINGTON AVENUE MANHATTAN | Alteration | Signed-off | 08/29/2022 | 01/05/2023 | Design CONCESSI ENGINEERING, P.C. Owner SL GREEN REALTY CORP Contractor HYDRONIC CONCEPTS NY P&H | minor plumbing work. NO CHANGE OF USE, EGRESS OR OCCUPANCY. |
| M00761350 ↗ | 420 LEXINGTON AVENUE MANHATTAN | Alteration | Signed-off | 08/29/2022 | 09/23/2022 | Design CONCESSI ENGINEERING, P.C. Owner SL GREEN REALTY CORP Contractor ASHLAR MECHANICAL CORP | renovation to existing sprinkler system as per submitted drawings. New 20 sprinkler heads and removal of 19 existing heads with all related … |
| M00761307 ↗ | 420 LEXINGTON AVENUE MANHATTAN | Alteration | Signed-off | 08/29/2022 | 09/08/2022 | Design CONCESSI ENGINEERING, P.C. Owner SL GREEN REALTY CORP Contractor WHALEN CONSTRUCTION, INC | MINOR ALTERATIONS TO AN INTERIOR OF A SPACE: NON LOAD BEARING PARTITIONS, ADDITION OF 2 SPLIT AC UNITS, FLOORING, CEILINGS, ETC. NO CHANGE O… |
| Name | Projects together | Most recent |
|---|---|---|
| CONCESSI ENGINEERING, P.C. | 4 | 08/17/2026 |
| B+W ARCHITECTURE DPC | 1 | 08/17/2026 |
| Name | Projects together | Most recent |
|---|---|---|
| HYDRONIC CONCEPTS NY P&H | 2 | 08/17/2026 |
| WHALEN CONSTRUCTION, INC | 2 | 08/17/2026 |
| ASHLAR MECHANICAL CORP | 1 | 08/29/2022 |
| HYDRONIC CONCEPTS NY PLBG | 1 | 08/17/2026 |
| Name | Projects together | Most recent |
|---|---|---|
| SL GREEN REALTY CORP | 3 | 02/02/2023 |
| 59 MAIDEN LANE ASSOCIATES, LLC | 1 | 08/17/2026 |
| Name | Projects together | Most recent |
|---|---|---|
| MP DESIGN AND CONSTRUCTION | 3 | 02/02/2023 |
| WHIDDEN SILVER INC. | 1 | 08/17/2026 |
| Project | Address | Type | Status | Filed | Latest permit | On the project | Description |
|---|---|---|---|---|---|---|---|
| M01295741 ↗ | 354 LEXINGTON AVENUE MANHATTAN | Alteration | Signed-off | 10/23/2025 | 01/06/2026 | Design CONCESSI ENGINEERING, P.C. Contractor WHALEN CONSTRUCTION, INC Filer WHIDDEN SILVER INC. | Modify plumbing system to add connection for coffee maker on 5th floor Board Room and replace restroom fixtures on the 6th floor. Modificat… |
| M00761337 ↗ | 420 LEXINGTON AVENUE MANHATTAN | Alteration | Signed-off | 08/29/2022 | 01/05/2023 | Design CONCESSI ENGINEERING, P.C. Owner SL GREEN REALTY CORP Contractor HYDRONIC CONCEPTS NY P&H | minor plumbing work. NO CHANGE OF USE, EGRESS OR OCCUPANCY. |
| M00761350 ↗ | 420 LEXINGTON AVENUE MANHATTAN | Alteration | Signed-off | 08/29/2022 | 09/23/2022 | Design CONCESSI ENGINEERING, P.C. Owner SL GREEN REALTY CORP Contractor ASHLAR MECHANICAL CORP | renovation to existing sprinkler system as per submitted drawings. New 20 sprinkler heads and removal of 19 existing heads with all related … |
| M00761307 ↗ | 420 LEXINGTON AVENUE MANHATTAN | Alteration | Signed-off | 08/29/2022 | 09/08/2022 | Design CONCESSI ENGINEERING, P.C. Owner SL GREEN REALTY CORP Contractor WHALEN CONSTRUCTION, INC | MINOR ALTERATIONS TO AN INTERIOR OF A SPACE: NON LOAD BEARING PARTITIONS, ADDITION OF 2 SPLIT AC UNITS, FLOORING, CEILINGS, ETC. NO CHANGE O… |
| Building | Filings | Most Recent |
|---|---|---|
| 354 LEXINGTON AVENUE ↗ | 1 | 08/17/2026 |
| 420 LEXINGTON AVENUE ↗ | 3 | 02/02/2023 |