What was permitted
A substantial mechanical systems project is being undertaken at 257 Alexander Avenue in the Bronx. This permit covers the installation of a VRF heat pump and ventilation system throughout the building, from the cellar up to the fourth floor. The scope of work is focused on upgrading the climate control and air quality within the occupied areas.
The estimated cost for this extensive HVAC and ventilation system installation is $657,000. The permit was issued on July 24, 2026, with SIENIA CONSTRUCTION INC serving as the general contractor. This project does not involve any changes to the building's use, egress, or occupancy.
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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 | 500894545 |
|---|---|
| Work permit # | X01358989-S1-MS |
| Job filing number | — |
| Work type | Mechanical Systems |
| Status | Permit Issued |
| Job description | HVAC VRF Heat pump system and ventilation system installation at cellar through 4th floor occupied areas. No change in use, egress & occupancy with this application. |
| Floor / unit | Cellar, Floor Number(s) 1 through 4, Roof |
| Estimated cost | $657,000 |
| Approved | April 9, 2026 |
| Issued | July 24, 2026 |
| Expires | March 31, 2027 |
| BBL | — |
| BIN | — |
Property owner
Nypd
Shannon Stapleton
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