Building Conversion & Enlargement at 550 Union Street, Brooklyn
550 UNION STREET, Brooklyn, 11215 · Carroll Gardens-Cobble Hill-Gowanus-Red Hook
What was permitted
A major transformation is occurring at 550 Union Street in Brooklyn's Carroll Gardens-Cobble Hill-Gowanus-Red Hook area, involving the conversion of an existing 2-story commercial building into a residential R-2 building. The project includes horizontal and vertical enlargement to create a 5-story building with a cellar and 8 dwelling units.
This permit was issued on July 8, 2026, with a substantial estimated project cost of $3,340,000. DYNATEC DEVELOPEMENT INC (GC) is the contractor, and the plans include new egress stairs and a fully sprinklered building.
In the Carroll Gardens-Cobble Hill-Gowanus-Red Hook area, a significant project at 550 Union Street will convert a commercial building to residential use, with an estimated cost of $3,340,000.
What it cost
Issued
July 8, 2026
Expires
October 5, 2026
License
General Contractor
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Filed by DYNATEC DEVELOPEMENT INC · 11 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 | 445892974 |
| Work Permit # | B01257108-I1-GC |
| Job Filing Number | — |
| Work Type | General Construction |
| Status | Permit Issued |
| Job Description | Alteration CO application as-of-right conversion of existing 2 story commercial building into a residential R-2 building with horizontal & vertical enlargement for 8 D.U.'s, 5 stories & Cellar. New egress stairs & building to be fully sprinklered. |
| Floor / Unit | Cellar, Cellar, Cellar, Cellar, Floor Number(s) 1, Floor Number(s) 1, Floor Number(s) 1, Floor Number(s) 1, Floor Number(s) 1, Floor Number(s) 2, Floor Number(s) 2, Floor Number(s) 3, Floor Number(s) |
| Estimated Cost | $3,340,000 |
| Approved | July 7, 2026 |
| Issued | July 8, 2026 |
| Expires | October 5, 2026 |
| BBL | — |
| BIN | — |
Property Owner
Union Street Property Owner
Tomer Yogev