423 87th Street, Brooklyn
Commercial · built c. 1922 · Block 6045, Lot 58.
Building permits
- Major Renovation — Non-residential, filed Mar 24, 2026, estimated cost $9.8M, 2 stories, described as “Change of use and enlargement to for the ambulatory care facility including demo of above grade construction; existing foundation slab and foundation walls to remain; and installation of new floors, walls, interior partitions, and finishes…”
- Alteration, filed Aug 28, 2025, estimated cost $100K, described as “Modification to existing HVAC system as per plans filed herewith. No change in use, egress or occupancy under this application.”
- Alteration, filed Aug 19, 2025, estimated cost $65K, described as “Interior non-structural demolition per plans, no change in use egress or occupancy”
- Alteration, filed Mar 11, 2024, estimated cost $84K, described as “Replace 20 ton rooftop unit connecting to existing ductwork, power and controls. Gas piping connection to be done by licensed plumber under and laa. Replace two split two ton air condtioing systems.”
- Alteration, filed Mar 28, 2023, estimated cost $21K, described as “Lighting upgrades for Bank of America. No change to use, egress or occupancy.”
- Alteration, filed Jul 13, 2022, estimated cost $26K, described as “Direct replacement of rooftop units.”
- Alteration, filed May 3, 2022, estimated cost $225K, described as “Structural filing of a reinforcement wall and framing work. No change to use, egress or occupancy.”
- Alteration, filed Jul 7, 2021, estimated cost $35K, described as “Installation of safety railing in existing roof.No change of Use, Egress or Occupancy.”
Property taxes
- Assessment
- $5,199,300
- 2026–27 tax
- $417,801
- Market value (city estimate)
- $11,554,000
- Taxable value
- $4,171,070
- Assessed land
- $1,781,550
- Assessed improvements
- $3,417,750
Zoning
C4-2A: floor area ratio 1.10 built, 3.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Jul 31, 2025: $13,285,714, sold with other lots
Open-market sales since 2016, from the Department of Finance’s sales files.