# 684 Dean Street, Brooklyn

Condominium · 5 units · built 2023 · Block 1138, Lot 7503.

On Umarelli: https://umarelli.org/nyc/3011387503/684-dean-street

More construction in Prospect Heights: https://umarelli.org/nyc/brooklyn/prospect-heights.md

## Building permits

- Alteration, filed Jun 30, 2025, estimated cost $2K, described as “Application filed for a temporary use permit for 2 model apartments pursuant to section ac 28-111 & buildings bulletin 2010-002. No new construction, change of use, egress, or occupancy is proposed. In conjunction with NB #321598491.”
- Alteration, filed Apr 10, 2024, described as “Installation of temporary pipe scaffold as per plans. No change in use, egress or occupancy.”
- Alteration, filed Nov 30, 2023, estimated cost $3K, described as “Application filed to install overhead protection for 680 Dean Street.”
- Alteration, filed Nov 16, 2021, described as “Installation of temporary pipe scaffold as per plans. No change in use, egress or occupancy.”
- Alteration, filed Nov 16, 2021, described as “Installation of temporary sidewalk shed as per plans. No change in use, egress or occupancy.”
- Alteration, filed Feb 23, 2021, estimated cost $1K, described as “Plumbing work as per plans filed. Filed in conjunction with NB# 321598491”
- Alteration, filed Feb 18, 2021, estimated cost $1K, described as “Mechanical work as per plans filed.”
- Alteration, filed Feb 18, 2021, estimated cost $1K, described as “Sprinkler application as per plans filed”
- Alteration, filed Feb 3, 2021, estimated cost $1K, described as “Structure filed in conjunction with NB job number 321598491. New 7-story masonry building and cellar with epicore composite floor system.”
- Alteration, filed Nov 12, 2020, estimated cost $4K, described as “Filed herewith a temporary 8' construction fence”

## Property taxes

- Assessment: $849,600
- 2026–27 tax: $103,425
- Market value (city estimate): $1,888,000
- Taxable value: $831,457
- Assessed land: $90,901
- Assessed improvements: $758,699
- Condo units with their own tax lots: 5

## Zoning

R6 (part of the lot is R7A): floor area ratio 3.41 built, above the 2.43 base zoning allows, which bonuses, transfers or older rules can permit.

## Recent sales

- Dec 30, 2025: $2,990,000, Apt 1
- Dec 29, 2025: $2,999,999, Apt 5
- Dec 2, 2025: $1,800,000, Apt 4

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

## Flood zone

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

## In the news

[Permits Filed for 684 Dean Street in Prospect Heights, Brooklyn](https://newyorkyimby.com/2020/10/permits-filed-for-684-dean-street-in-prospect-heights-brooklyn.html), New York YIMBY, Oct 19, 2020.

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