NYC Permit AlertsBy BuildPermitGuide

Neighborhoods › Park Slope

509 6 Avenue, Brooklyn: 9 building jobs on file

Building Identification Number 3023254 · Park Slope. Newest first.

Alteration: Proposed installation of temporary fence as per plans. no change…, est. $9K
Permit Entire · filed Oct 6, 2026 · est. $9,000
Facade/scaffold work: Installation of 300psf sidewalk shed and pipe…, est. $9K
Permit Entire · filed Sep 20, 2026 · est. $9,000
Interior renovation: Renovation & conversion of a 2 family house to 1 family…, est. $50K
Permit Entire · filed Apr 21, 2026 · est. $50,000
Mechanical/plumbing work: Installation of a new sprinkler system in a one…, est. $70K
Permit Entire · filed Feb 4, 2026 · est. $70,000
Interior renovation: Scope of work: renovation & conversion of 2-family…, est. $155K
Permit Entire · filed Feb 2, 2026 · est. $155,000
New 4-story building, 1 unit, est. $37K
Permit Entire · filed Feb 2, 2026 · est. $37,000
Enlargement to 4 stories, est. $256K
Permit Entire · filed Dec 29, 2025 · est. $256,048
Interior renovation: Conversion of a two-family residence to a single-family…, est. $449K
Permit Entire · filed Nov 23, 2025 · est. $448,888
Interior renovation: Interior renovation of an existing two family home…, est. $385K
Permit Entire · filed Oct 23, 2025 · est. $384,600

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