# 417 Adelphi Street, Brooklyn

Single family · built 2025 · Block 1958, Lot 1.

On Umarelli: https://umarelli.org/nyc/3019580001/417-adelphi-street

More construction in Fort Greene: https://umarelli.org/nyc/brooklyn/fort-greene.md

## Building permits

- New Building — Residential, filed Sep 11, 2024, 1 unit, 4 stories, described as “Proposed four (4) story, one (1) family dwelling as per plans filed herewith.”
- Alteration, filed Dec 5, 2025, estimated cost $1K, described as “Installation of temporary heavy duty sidewalk shed as per plans. No change in use, egress or occupancy. Sidewalk shed shall comply with chapter #33 of 2022 the NYC building code. Live load 300PSF.”
- Alteration, filed Jan 22, 2025, estimated cost $8K, described as “Installation of temporary construction fence filed in conjunction with GC #B01100540-I1”

## Property taxes

- Assessment: $16,800
- 2026–27 tax: $3,334
- Market value (city estimate): $280,000
- Taxable value: $16,800
- Assessed land: $16,800

## Zoning

R6B: floor area ratio 2.19 built, above the 2.00 base zoning allows, which bonuses, transfers or older rules can permit.

## Recent sales

- Aug 16, 2024: $1,300,000
- Feb 8, 2024: $400,000
- Apr 11, 2022: $28,125
- Jan 25, 2021: $142,000
- Oct 17, 2018: $46,000

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

## Flood zone

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

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