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General ConstructionBrooklynPermit issued

New Stairway Construction at 427 7th Avenue, Brooklyn

427 7 AVENUE, Brooklyn, 11215 · Park Slope

Winston

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Reported project cost

$28,450

As declared on the permit filing. Structural.

Issued
May 20, 2026
Expires
March 4, 2027
License
General Contractor

What was permitted

Homeowners in Park Slope considering renovations might find this permit informative. This project involves general construction to add a new interior stairway between the cellar and first floors, incorporating structural steel and concrete footings.

The permit for this work was issued on May 20, 2026, with an estimated project cost of $28,450. MERCURY BUILDING ASSO INC is the general contractor listed for this job.

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View the official permit record

Tracking number, work description, cost and dates

Tracking number504547530
Work permit #B01310128-I1-GC-CX
Job filing number—
Work typeStructural
StatusPermit Issued
Job descriptionProvide new stairway within existing wood framing with new structural steel supporting beams, columns and concrete footings. Provide new communicating steel stair between cellar and 1st floors, provide new cellar access door at cellar, per drawings.
Floor / unitCellar, Cellar, Ground Floor, Ground Floor
Estimated cost$28,450
ApprovedDecember 1, 2025
IssuedMay 20, 2026
ExpiresMarch 4, 2027
BBL—
BIN—

Property owner

Kai Chui Chan

Related searches

general constructionstairway renovationPark SlopeBrooklyn home improvementstructural steelresidential constructionNYC permits