# 231 Dean Street, Brooklyn

Single family · built c. 1853 · Block 190, Lot 46.

On Umarelli: https://umarelli.org/nyc/3001900046/231-dean-street

More construction in Boerum Hill: https://umarelli.org/nyc/brooklyn/boerum-hill.md

## Building permits

- Alteration, filed Oct 26, 2026, estimated cost $15K, described as “Application filed for sprinkler work as per plans.”
- Major Renovation — Residential, filed Oct 22, 2026, estimated cost $58K, 1 unit in all, 4 stories, described as “Altco filed to show compliance w/ 2022 code as req. (NYC code section 28-101.4.5). Including new stair bulkhead. See NYC DOB # for general construction, structural, mh, plumbing (B01375416) & sprinkler (B01475373).”
- Alteration, filed Apr 24, 2026, estimated cost $3K, described as “Installation of temporary plywood xonstruction fence”
- Alteration, filed Mar 26, 2026, estimated cost $609K, described as “Renovation of existing 1 family building. No change of use, egress or occupancy”
- Alteration, filed Dec 8, 2022, estimated cost $456K, described as “General renovation of existing 1 family townhouse including structural work as per plans. Plumbing and mechanical work to be filed subsequently. No change to use, egress or occupancy.”

## Property taxes

- Assessment: $317,880
- 2026–27 tax: $9,432
- Market value (city estimate): $5,298,000
- Taxable value: $47,533
- Assessed land: $34,980
- Assessed improvements: $282,900

## Zoning

R6B: floor area ratio 1.80 built, 2.00 allowed by base zoning.

## Recent sales

- Mar 19, 2026: $3,625,000, 3,780 sq ft ($959 per sq ft)
- Jan 18, 2022: $3,700,000

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

## Flood zone

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

## Landmarks

Part of Boerum Hill Historic District (Historic District). 9 Landmarks Preservation Commission permits are on file.

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