# 427 1st Street, Brooklyn

Two-family · built c. 1901 · Block 966, Lot 61.

On Umarelli: https://umarelli.org/nyc/3009660061/427-1-street

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

Every lot on block 966: https://umarelli.org/nyc/brooklyn/966.md

## Building permits

- Alteration, filed Oct 9, 2025, estimated cost $28K, described as “Installation of solar panels on existing roof. No change in use, occupancy, or egress. No change in bulk”
- Alteration, filed Sep 17, 2024, estimated cost $450K, described as “Existing 2 family dwelling to be fully renovated and horizontally enlarged. New partition walls, finish flooring, new interior doors, tiles and plumbing fixtures as per plans. New metal deck at rear. Obtain new certificate of occupancy.”
- Alteration, filed Jul 30, 2024, estimated cost $8K, described as “Install new temporary wood fence as per drawings”

## Property taxes

- Assessment: $257,520
- 2026–27 tax: $8,312
- Market value (city estimate): $4,292,000
- Taxable value: $54,174
- Assessed land: $36,480
- Assessed improvements: $221,040

## Tax breaks

- Solar abatement, through Jun 30, 2030, a $2,438 credit this tax year.

## Zoning

R6B: floor area ratio 1.73 built, 2.00 allowed by base zoning.

## Recent sales

- Sep 9, 2024: $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.

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