452 Union Street, Brooklyn
Apartment building · 158 units · built 2025 · Block 438, Lot 7.
Building permits
- New Building — Tower, filed Sep 24, 2021, 158 units, 20 stories, described as “New 20-story mixed use building.”
- Alteration, filed Sep 10, 2025, described as “Installation of temporary construction fence per plan submitted. Work shall comply with 2022 building codes chapter 33. No change in use, egress and/or occupancy with this application.”
- Alteration, filed Sep 3, 2025, estimated cost $5K, described as “Installation of temporary roof/overhead protection per plan submitted. Work shall comply with 2022 building codes chapter 33. No change in use, egress and/or occupancy with this application.”
- Alteration, filed Aug 5, 2025, estimated cost $26K, described as “Application filed for support-of-excavation at sidewalk/street for installation of precast concrete con edison vaults”
- Alteration, filed Jul 14, 2025, described as “Installation of temporary sidewalk shed per plan submitted. Work shall comply with 2022 building codes chapter 33. No change in use, egress and/or occupancy with this application.”
- Alteration, filed Jan 8, 2025, estimated cost $20K, described as “Installation of 7,000# temporary dual cars personnel/material hoists in conjunction with NB# B00591118-I1 per plan submitted. Work shall comply with 2022 building codes chapter 33. No change in use, egress and/or occupancy with this…”
- Alteration, filed Dec 6, 2024, described as “Installation of temporary supported scaffold per plan submitted. Work shall comply with 2022 building codes chapter 33. No change in use, egress and/or occupancy with this application.”
- Alteration, filed Nov 19, 2024, estimated cost $5K, described as “Installation of temporary 8' high pluwood construction fence, no change in use, occupancy, or egress under this application.”
- Alteration, filed Mar 22, 2023, estimated cost $1K, described as “Installation of 8 inch high fence at subject premises.”
- No Work, filed Apr 2, 2019, described as “The eating and drinking temporary place of assembly will take place from 10:00am - 1:00am, daily.”
Property taxes
- Assessment
- $1,287,450
- 2026–27 tax
- $101,461
- Market value (city estimate)
- $2,861,000
- Taxable value
- $815,670
- Assessed land
- $1,287,450
Zoning
M1-4/R7-2: floor area ratio 7.51 built, above the 3.44 base zoning allows, which bonuses, transfers or older rules can permit.
Flood zone
Current FEMA flood map: zone X, moderate risk: a 0.2% chance of flooding each year.
Recent sales
- Sep 14, 2022: $40,650,000
Open-market sales since 2016, from the Department of Finance’s sales files.
Board and land use applications
- GSD Waterfront Certification - 450 Union (City Planning 2023K0276): Certification, Filed, filed Jul 5, 2023, decided Feb 5, 2024. A Chairperson Certification pursuant to ZR 62-811(c) to facilitate a new as-of-right mixed-use development, including 5,700 SF of waterfront public access areas, is being sought by a private applicant, 2201 Union LLC, at 450 Union Street…
- GSD Remediation Certification - 450 Union Street (City Planning 2022K0350): Certification, Completed, filed Mar 3, 2022, decided Mar 17, 2022. A Chairperson Certification pursuant to ZR 139-51 (g) to facilitate a new as-of-right development including 4,000 SF of waterfront public access areas, is being sought by a private applicant, 450 Union Street LLC, at 450 Union Street…
- Union Street Waterfront Certification (City Planning 2019K0308): Certification, Completed, filed May 22, 2020, decided Jun 6, 2023. A Waterfront Certification pursuant to ZR Section 62-811 to facilitate a new approximately 4,000 sq ft waterfront public access area along the Gowanus Canal, is being sought by a private applicant, 450 Union Street, LLC at 450 Union…
- Variance or special permit (Board of Standards and Appeals 75-02-BZ): Variance or special permit, Denied, filed Mar 12, 2002, decided Feb 3, 2004. Variance (§72-21) to permit the proposed construction of a six story, 64-unit residential building, Use Group 2, located in an M2-1 zoning district, is contrary to §42-00.
- Gowanus Neighborhood Plan (City Planning 2018K0382): Zoning map change, Zoning text change, City map change, Urban development action area, Completed, decided Dec 6, 2021. The Gowanus Neighborhood Plan is a shared, long-term vision for a thriving neighborhood. It looks to identify strategies for an equitable, resilient and sustainable Gowanus, with more local jobs and housing. The Plan supports community…
In the news
New Renderings Revealed For Anagram Gowanus At 450 Union Street In Brooklyn, New York YIMBY, Oct 26, 2026.