# 427 7th Avenue, Brooklyn

Condominium · 7 units · built c. 1894 · Block 1102, Lot 7503.

On Umarelli: https://umarelli.org/nyc/3011027503/427-7-avenue

More construction in Park Slope: https://umarelli.org/nyc/brooklyn/park-slope.md

Every lot on block 1102: https://umarelli.org/nyc/brooklyn/1102.md

## Building permits

- Alteration, filed Nov 28, 2025, estimated cost $28K, described as “Provide new stairway within existing wood framing with new structural steel supporting beams, columns and concrete footings. Provide new communicating steel stair between cellar and 1st floors, provide new cellar access door at cellar, per…”

## Property taxes

- Assessment: $1,496,700
- 2026–27 tax: $61,256
- Market value (city estimate): $3,326,000
- Taxable value: $583,229
- Assessed land: $61,200
- Assessed improvements: $1,435,500
- Condo units with their own tax lots: 3

## Zoning

R6A: floor area ratio 2.64 built, 3.00 allowed by base zoning.

## Recent sales

- Aug 15, 2025: $500,000, Apt COM1
- May 20, 2025: $520,000, Apt COM2
- Oct 20, 2022: $720,000
- Aug 24, 2020: $705,000, Apt 2L
- Apr 27, 2020: $565,000, Apt RES3

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 Park Slope Historic District Extension (Historic District). 5 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