HVAC Modifications at 11 Madison Avenue
11 MADISON AVENUE, MANHATTAN, 10010 · Midtown South-Flatiron-Union Square
Estimated Project Cost
$0
Mechanical Systems
Issued
April 17, 2026
Expires
May 29, 2026
License
General Contractor
About This Project
This permit covers modifications to the existing HVAC system, including duct work and the installation of chiller water air handling units, at 11 Madison Avenue. The project is taking place on the Cellar, 1st floor, and 1st Floor Mezzanine.
The permit was issued on April 17, 2026, with an estimated cost of $990,000. The contractor listed is M & S MECHANICAL SERVICES.
What This Means For You
This large-scale HVAC project at 11 Madison Avenue reflects significant investment in mechanical systems within the Midtown South-Flatiron-Union Square neighborhood.
The Business That Did This Work
M & S MECHANICAL SERVICES
General Contractor · License #606071
855 CONKLIN STREET.SUITE F
2 permits filed · 2 neighborhoods
Permit Details
| Tracking Number | 208072313 |
| Work Permit # | M01334241-I1-MS |
| Job Filing Number | — |
| Work Type | Mechanical Systems |
| Status | Permit Issued |
| Job Description | Modifications to the existing HVAC system and associated duct work, and the installation of chiller water air handling units on the Cellar, 1st floor, and 1st Floor Mezzanine, as per plans. No change to use, egress, or occupancy. |
| Floor / Unit | Cellar, Floor Number(s) 1 through 1, Mezzanine 1 through 2 |
| Estimated Cost | $990,000 |
| Approved | March 6, 2026 |
| Issued | April 17, 2026 |
| Expires | May 29, 2026 |
| BBL | — |
| BIN | — |
Property Owner
SL GREEN REALTY CORP
Gianna Pilalis
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