NYC Permit AlertsBy BuildPermitGuide

Neighborhoods › Brooklyn Navy Yard

21 Flushing Avenue, Brooklyn: 5 building jobs on file

Building Identification Number 3421807 · Brooklyn Navy Yard. Newest first.

Mechanical/plumbing work: Update scope of work to minor work includes capping…, est. $18K
Approved · filed Aug 23, 2026 · est. $18,300
Interior renovation: Reverting the suite back to two suite spaces. work…, est. $164K
Approved · filed Feb 24, 2026 · est. $164,192
Mechanical/plumbing work: Ductwork adjustment to split the tenant space on…, est. $14K
Approved · filed Feb 24, 2026 · est. $14,340
Mechanical/plumbing work: Subsequent plumbing scope to intiial alteration.…, est. $18K
Approved · filed Feb 23, 2026 · est. $18,300
Interior renovation: Removal of existing non-bearing interior partitions and…, est. $16K
Permit Entire · filed Feb 12, 2026 · est. $15,990

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