General Construction Permit Issued for 2-Family to 1-Family Conversion at 45 St Marks Avenue, Brooklyn
45 ST MARKS AVENUE, BROOKLYN, 11217 · Park Slope
What was permitted
This permit covers general construction work at 45 St Marks Avenue, Brooklyn 11217. The project involves a significant alteration to an existing 3-story building with basement and cellar, transforming it from a two-family dwelling into a single-family residence. The scope of work includes all necessary modifications to achieve this conversion, with the goal of obtaining a new Certificate of Occupancy.
The permit for this extensive renovation was officially issued on March 26, 2026, and is scheduled to expire on January 15, 2027. With an estimated cost of $732,900, this permit signifies that the proposed construction work has been approved by the Department of Buildings.
PRIMROSE SERVICE INC (GC) is the licensed general contractor responsible for executing this project. The property owner listed for this permit is MTEK LLC, overseeing the transformation of this Park Slope property.
This permit indicates approved plans for a major renovation, converting a multi-family home into a single-family residence. Nearby residents may observe construction activity as PRIMROSE SERVICE INC carries out the approved work.
What it cost
Issued
March 26, 2026
Expires
January 15, 2027
License
General Contractor
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Filed by PRIMROSE SERVICE INC · 25 permits across 11 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 | 211392833 |
| Work Permit # | B01186373-I1-GC-CX |
| Job Filing Number | — |
| Work Type | Structural |
| Status | Permit Issued |
| Job Description | ALTERATION ON EXISTING 3-STORY WITH BASEMENT &CELLAR, TWO (2) FAMILY INTO ONE (1) FAMILY D.U. AS PER PLAN SHOW. OBTAIN NEW C OF O. |
| Floor / Unit | Cellar, Basement, Floor Number(s) 1, Floor Number(s) 2, Floor Number(s) 3, Roof |
| Estimated Cost | $732,900 |
| Approved | September 24, 2025 |
| Issued | March 26, 2026 |
| Expires | January 15, 2027 |
| BBL | — |
| BIN | — |
Property Owner
MTEK LLC
Joe Mashieh