Mechanical Systems Installation at 257 Alexander Avenue, Bronx
257 ALEXANDER AVENUE, BRONX, 10454 · Mott Haven-Port Morris
Estimated Project Cost
$0
Mechanical Systems
Issued
April 24, 2026
Expires
July 23, 2026
License
General Contractor
About This Project
A significant mechanical systems upgrade is underway at 257 Alexander Avenue in the Mott Haven-Port Morris neighborhood of the Bronx. This project involves the installation of an HVAC VRF heat pump system and a ventilation system throughout the cellar and up to the 4th floor of occupied areas.
This permit was issued on April 24, 2026, with an estimated project cost of $657,000. SIENIA CONSTRUCTION INC is listed as the General Contractor for this extensive installation.
What This Means For You
Homeowners in Mott Haven-Port Morris can expect to see significant HVAC upgrades with a permit valued at $657,000, indicating a large-scale system installation.
The Business That Did This Work
SIENIA CONSTRUCTION INC
General Contractor · License #613084
48-14 54TH AVENUE
7 permits filed · 5 neighborhoods
Permit Details
| Tracking Number | 454749668 |
| 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 | April 24, 2026 |
| Expires | July 23, 2026 |
| BBL | — |
| BIN | — |
Property Owner
NYPD
SHANNON STAPLETON
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