# 473 Union Street, Brooklyn

Two-family · built c. 1899 · Block 430, Lot 48.

On Umarelli: https://umarelli.org/nyc/3004300048/473-union-street

More construction in Gowanus: https://umarelli.org/nyc/brooklyn/gowanus.md

## Building permits

- Alteration, filed Jul 26, 2023, estimated cost $1K, described as “Installation of temporary heavy duty sidewalk shed as per plans. No change in use, egress or occupancy. Sidewalk shed shall comply with chapter #33 of 2022 the NYC building code. Live load 300PSF.”
- Alteration, filed Nov 16, 2022, estimated cost $1K, described as “Install temp construction fence.”
- Major Renovation — Residential, filed Aug 28, 2022, estimated cost $656K, 2 units in all, 3 stories, described as “Proposed extension of a existing 2 family 3-story residence and interior renovation at all floors to include HVAC, plumbing, general construction to include an extension at rear, 100% joist replacement”

## Property taxes

- Assessment: $214,320
- 2026–27 tax: $12,018
- Market value (city estimate): $3,572,000
- Taxable value: $60,564
- Assessed land: $51,180
- Assessed improvements: $163,140

## Zoning

R6B: floor area ratio 2.00 built, 2.00 allowed by base zoning.

## Recent sales

- May 19, 2022: $1,900,000

Open-market sales since 2016, from the Department of Finance’s sales files.

## Flood zone

Current FEMA flood map: zone X, minimal flood hazard. FEMA’s preliminary map: zone X, moderate risk: a 0.2% chance of flooding each year.

From New York City and Jersey City public records, refreshed within a day of each release. Sources: https://umarelli.org/sources. Methodology and corrections: https://umarelli.org/methodology