# 223 Frost Street, Brooklyn

Condominium · 7 units · built c. 1899 · Block 2857, Lot 7510.

On Umarelli: https://umarelli.org/nyc/3028577510/223-frost-street

More construction in East Williamsburg: https://umarelli.org/nyc/brooklyn/east-williamsburg.md

## Building permits

- Alteration, filed May 20, 2024, estimated cost $8K, described as “Proposed installation of pipe scaffold for work as per plans. No change in use occupancy or egress under this application.”
- Alteration, filed Nov 11, 2023, estimated cost $5K, described as “Proposed installation of heavy duty sidewalk shed for demolition protection as per plans. No change in use occupancy or egress under this application. Live load 300 per square feet. Sidewalk shed shall comply with chapter # 33 of the 2022…”
- Alteration, filed Dec 9, 2022, estimated cost $7K, described as “Plumbing work for a existing 3 story building to convert to a 4 story with penthouse building, 7 dwelling units. No change in use, bulk or egress under this application.”
- Alteration, filed Nov 24, 2022, estimated cost $106K, described as “Underpinning in conjunction with SE Job #B08002204 and ST/FO #B00719497”
- Alteration, filed Sep 28, 2022, estimated cost $71K, described as “Support of excavation including Shoring/Bracing in conjunction with Job # B00717650”
- Alteration, filed Aug 5, 2022, estimated cost $21K, described as “Installation of new sprinkler system in conjunction with DOB alt 1 job # B00717650”
- Alteration, filed Jul 1, 2022, estimated cost $242K, described as “Foundation and structural filed in conjunction with alteration 1 application # B00717650. Partial demolition throughout.”
- Major Renovation — Conversion, filed Apr 26, 2022, estimated cost $1.0M, 5 units added, 4 stories, described as “Existing 3 story building to convert to a 4 story with penthouse building, proposed 7 dwelling units. Partial demolition throughout.”
- Alteration, filed Feb 14, 2022, estimated cost $1K, described as “Installation of temporary construction fence.”

## Property taxes

- Assessment: $1,364,849
- 2026–27 tax: $56,783
- Market value (city estimate): $3,033,000
- Taxable value: $456,487
- Assessed land: $62,100
- Assessed improvements: $1,302,749
- Condo units with their own tax lots: 7

## Zoning

R6B: floor area ratio 2.57 built, above the 2.00 base zoning allows, which bonuses, transfers or older rules can permit.

## Recent sales

- Jul 17, 2026: $900,000, Apt 3R
- May 26, 2026: $895,000, Apt 2R
- Feb 2, 2026: $1,299,000, Apt 4F
- Jan 27, 2026: $1,250,000, Apt 4R
- Jan 23, 2026: $2,250,000, Apt 1
- Jan 21, 2026: $895,000, Apt 2F
- Jan 21, 2026: $910,000, Apt 3F

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