Brooklyn · Carroll Gardens-Cobble Hill-Gowanus-Red Hook · Public building report

434 Union Street, Brooklyn

434 Union Street is a 3-story, 3-unit residential condo in Carroll Gardens-Cobble Hill-Gowanus-Red Hook. NYC public records show 3 DOB complaints, 1 DOB violation and 18 HPD violations associated with the building. The most recent DOB complaint was filed January 12, 2026. Public sale records were identified for 2 units.

This building is the 317th most valuable building in Carroll Gardens-Cobble Hill-Gowanus-Red Hook and the 24,404th in New York. It ranks in the top 32% for DOB complaints, top 36% for DOB violations and top 14% for HPD violations.

Public records

• DOB complaints 3
• DOB violations 1
• HPD violations 18
• Bedbug reports 0
• 311 requests 0
• Residential units 3 $4,141,100 last recorded sales