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Mechanical SystemsBrooklynPermit issued

Mechanical Systems Upgrade at 423 Atlantic Avenue, Brooklyn

423 ATLANTIC AVENUE, Brooklyn, 11217 · Downtown Brooklyn-DUMBO-Boerum Hill

Winston

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Reported project cost

$24,900

As declared on the permit filing. Mechanical Systems.

Issued
June 4, 2026
Expires
November 7, 2026
License
General Contractor

What was permitted

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.

Plan a similar project

Want work like this done at your place?

Tell us what you have in mind. We scope it, price it against work like this in Brooklyn, and lines up the right contractor. You approve; we handle the back-and-forth.

View the official permit record

Tracking number, work description, cost and dates

Tracking number881902719
Work permit #B01265960-S2-MS
Job filing number—
Work typeMechanical Systems
StatusPermit Issued
Job descriptionREMOVAL AND INSTALLATION OF DUCTWORK AND A/C UNITS AND RELATED MECHANICAL PIPING, AS PER PLANS. NO CHANGE TO USE, EGRESS OR OCCUPANCY.
Floor / unitFloor Number(s) 4 through 4, Roof
Estimated cost$24,900
ApprovedSeptember 29, 2025
IssuedJune 4, 2026
ExpiresNovember 7, 2026
BBL—
BIN—

Property owner

Edward Dornblaser

Related searches

mechanical systemsductworkA/C unitsDowntown Brooklyn-DUMBO-Boerum HillBrooklynNew York City$24,900