Mechanical Systems Upgrade at 423 Atlantic Avenue, Brooklyn
423 ATLANTIC AVENUE, BROOKLYN, 11217 · Downtown Brooklyn-DUMBO-Boerum Hill
Estimated Project Cost
$0
Mechanical Systems
Issued
June 4, 2026
Expires
November 7, 2026
License
General Contractor
About This Project
Homeowners and property managers in the Downtown Brooklyn-DUMBO-Boerum Hill area can gauge the cost of upgrading essential building systems. This permit covers the removal and installation of ductwork and A/C units, crucial for climate control and building efficiency.
This mechanical systems project was permitted on June 4, 2026, with an estimated cost of $24,900. UNICORN BUILDERS GROUP LL served as the general contractor for this work.
What This Means For You
Mechanical system upgrades, including ductwork and A/C units, in Downtown Brooklyn-DUMBO-Boerum Hill cost an estimated $24,900, reflecting the investment in building infrastructure.
The Business That Did This Work
UNICORN BUILDERS GROUP LL
General Contractor · License #624306
31 SOUTH STREET UNIT 1W
3 permits filed · 2 neighborhoods
Permit Details
| Tracking Number | 881902719 |
| Work Permit # | B01265960-S2-MS |
| Job Filing Number | — |
| Work Type | Mechanical Systems |
| Status | Permit Issued |
| Job Description | REMOVAL AND INSTALLATION OF DUCTWORK AND A/C UNITS AND RELATED MECHANICAL PIPING, AS PER PLANS. NO CHANGE TO USE, EGRESS OR OCCUPANCY. |
| Floor / Unit | Floor Number(s) 4 through 4, Roof |
| Estimated Cost | $24,900 |
| Approved | September 29, 2025 |
| Issued | June 4, 2026 |
| Expires | November 7, 2026 |
| BBL | — |
| BIN | — |
Property Owner
Edward Dornblaser
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