What was permitted
Residents in the Chelsea-Hudson Yards area might notice significant construction activity related to mechanical systems at 418 West 21 Street. This permit covers the removal and installation of mechanical ductwork and associated equipment for Seabury Hall.
The project, issued on May 7, 2026, has a substantial estimated cost of $5,423,750. CONSIGLI CONSTRUCTION CO is listed as the general contractor for this large-scale mechanical upgrade.
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View the official permit record
Tracking number, work description, cost and dates
View the official permit record
Tracking number, work description, cost and dates
| Tracking number | 451478596 |
|---|---|
| Work permit # | M01320412-S4-MS |
| Job filing number | — |
| Work type | Mechanical Systems |
| Status | Permit Issued |
| Job description | SEABURY HALL - REMOVAL AND INSTALLATION OF MECHANICAL DUCTWORK AND EQUIPMENT. |
| Floor / unit | Attic, Basement/Sub-basement, Floor Number(s) 001 through 004 |
| Estimated cost | $5,423,750 |
| Approved | April 22, 2026 |
| Issued | May 7, 2026 |
| Expires | December 30, 2026 |
| BBL | — |
| BIN | — |
Property owner
Vanderbilt University
Matthew Riethmiller
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