# 239 Union Street, Brooklyn

Four-family · built c. 1920 · Block 338, Lot 39.

On Umarelli: https://umarelli.org/nyc/3003380039/239-union-street

More construction in Carroll Gardens: https://umarelli.org/nyc/brooklyn/carroll-gardens.md

## Building permits

- Alteration, filed Sep 1, 2026, estimated cost $45K, described as “To file SP sprinkler work in conjunction with DOB Now Build application job#B01277178.”
- Alteration, filed Jul 21, 2026, estimated cost $35K, described as “To file PL work in conjunction with DOB Now Build application job#B01277178.”
- Alteration, filed Nov 17, 2025, estimated cost $10K, described as “To file GC work in conjunction with DOB Now Build job#B01277178. Remove interior non-load-bearing wall only at cel, bas, 001 to 003.”
- Major Renovation — Residential, filed Aug 28, 2025, estimated cost $515K, 1 unit in all, 4 stories, described as “Convert from 4 to 1 dwelling unit. Obtain new c of o.”

## Property taxes

- Assessment: $1,265,400
- 2026–27 tax: $10,646
- Market value (city estimate): $2,812,000
- Taxable value: $85,583
- Assessed land: $175,950
- Assessed improvements: $1,089,450

## Zoning

R6B: floor area ratio 1.52 built, 2.00 allowed by base zoning.

## Recent sales

- Jan 8, 2026: $4,100,000, 3,484 sq ft ($1,177 per sq ft)

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

## Flood zone

Current FEMA flood map: zone X, minimal flood hazard.

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