# 645 4th Avenue, Brooklyn

Auto repair · built 1963 · Block 637, Lot 5.

On Umarelli: https://umarelli.org/nyc/3006370005/645-4-avenue

More construction in Sunset Park: https://umarelli.org/nyc/brooklyn/sunset-park.md

## Building permits

- New Building — Mid-Rise, filed Jul 10, 2026, 28 units, 10 stories, described as “Development hub Job by Default; As Project is greater than Seven (7) stories, Per service notice Posted April 16, 2021 such Jobs shall be assigned to the Development Hub Unit - Subject building is a Ten Story Building”
- Alteration, filed Oct 30, 2026, estimated cost $160, described as “Proposed 8FT construction fence. No change to use, egress or occupancy under this application.”
- Alteration, filed Sep 15, 2026, estimated cost $1K, described as “Bpp filed herewith for a new sidewalk, curb & roadway filed in conjunction to new building application #B01429134-I1”
- Alteration, filed Aug 14, 2026, estimated cost $5K, described as “Application filed herewith for the installation of a temporary construction fence”
- Demolition, filed Jan 13, 2025, estimated cost $30K, described as “Full demolition to a one story building”

## Property taxes

- Assessment: $179,100
- 2026–27 tax: $18,111
- Market value (city estimate): $398,000
- Taxable value: $166,950
- Assessed land: $38,250
- Assessed improvements: $140,850

## Zoning

R8A: floor area ratio 0.96 built, 6.02 allowed by base zoning.

## Recent sales

- Feb 26, 2026: $2,900,000, 2,560 sq ft ($1,133 per sq ft)
- Aug 1, 2017: $3,300,000

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

## Flood zone

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

## In the news

[Permits Filed for 645 4th Avenue in South Slope, Brooklyn](https://newyorkyimby.com/2026/07/permits-filed-for-645-4th-avenue-in-south-slope-brooklyn.html), New York YIMBY, Jul 14, 2026.

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