Mechanical Systems at 405 MARCY AVENUE, Brooklyn
405 MARCY AVENUE, BROOKLYN, 11206 · South Williamsburg
What was permitted
This permit application is for mechanical systems work at a Brooklyn property, filed in conjunction with an existing Alt-CO application. This typically involves HVAC, plumbing, or electrical systems crucial for a building's operation.
The mechanical systems permit was issued on June 22, 2026, with an estimated project cost of $100,911.5. CORNERSTONE BUILDERS NY L (GC) is the contractor associated with this work.
Mechanical systems work in South Williamsburg, linked to another permit, has an estimated cost of over $100,000, indicating substantial building upgrades.
What it cost
Issued
June 22, 2026
Expires
July 9, 2026
License
General Contractor
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Filed by CORNERSTONE BUILDERS NY L · 4 permits across 2 neighborhoods
View the official permit record
Tracking number, work description, cost, and dates
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View the official permit record
Tracking number, work description, cost, and dates
| Tracking Number | 999907390 |
| Work Permit # | B01092846-S2-MS |
| Job Filing Number | — |
| Work Type | Mechanical Systems |
| Status | Permit Issued |
| Job Description | MECHANICAL APPLICATION FILED HEREWITH IN CONJUNCTION TO ALT-CO APPLICATION #B01092846-I1 |
| Floor / Unit | Cellar-SO-1928-B01092846-I1, Floor Number(s)-1-SO-3710-B01092846-I1, Floor Number(s)-4-SO-1137-B01092846-I1, Floor Number(s)-2-SO-5010-B01092846-I1, Floor Number(s)-3-SO-1304-B01092846-I1, Penthouse-4 |
| Estimated Cost | $100,912 |
| Approved | October 20, 2025 |
| Issued | June 22, 2026 |
| Expires | July 9, 2026 |
| BBL | — |
| BIN | — |
Property Owner
PR
Israel Feldheim