# 427 15th Street, Brooklyn

Co-op · 16 units · built c. 1909 · Block 1103, Lot 66.

On Umarelli: https://umarelli.org/nyc/3011030066/427-15-street

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

Every lot on block 1103: https://umarelli.org/nyc/brooklyn/1103.md

## Building permits

- Alteration, filed Jul 27, 2022, estimated cost $23K, described as “Filing herewith Mechanical work for Apt. 1A as per plans filed herewith. No change to use, egress or occupancy.”
- Alteration, filed Jul 26, 2022, estimated cost $14K, described as “Filing herewith plumbing work for Apt.1A as per plans filed herewith. No change to use, egress or occupancy.”
- Alteration, filed Jul 26, 2022, estimated cost $92K, described as “Filing herewith interior demo. and renovation of Apt. 1A as per plans filed herewith. No change to use, egress or occupancy.”
- Alteration, filed Sep 6, 2021, estimated cost $8K, described as “Proposed installation of heavy duty sidewalk shed as per plans. Live load 300 per square feet. Sidewalk shed shall comply with chapter # 33 of the 2014 code. No change in use occupancy or egress under this application.”
- Alteration, filed Mar 19, 2021, estimated cost $19K, described as “Install new exterior metal chimney as per plans. No change in use, egress or occupancy.”
- Alteration, filed Mar 19, 2021, estimated cost $60K, described as “Replace one (1) gas-fired boiler as per plans. Install two (2) new gas-fired hot water heaters. No change in use, egress or occupancy.”
- Alteration, filed Mar 19, 2021, estimated cost $10K, described as “Install two (2) new gas-fired hot water heaters. Connect to existing gas piping for replacement gas boiler. No change in use, egress or occupancy.”
- Alteration, filed Oct 30, 2020, described as “Installation of temporary supported scaffold per plan submitted. Work shall comply with 2014 building codes chapter 33. No change in use, egress and/or occupancy with this application.”
- Alteration, filed May 23, 2019, estimated cost $5K, described as “Proposed installation of temporary pipe scaffold as per plans. Work shall comply with chapter #33 of the NYC building code. No change in use, occupancy, or egress under this application.”
- Alteration, filed May 22, 2019, estimated cost $4K, described as “Proposed installation of heavy duty sidewalk shed as per plans. Live load 300 lbs per square feet. Sidewalk shed shall comply with chapter #33 of the NYC building code. No change in use, occupancy, or egress under this application.”

## Property taxes

- Assessment: $789,300
- 2026–27 tax: $70,160
- Market value (city estimate): $1,754,000
- Taxable value: $720,720
- Assessed land: $62,550
- Assessed improvements: $726,750

## Tax breaks

- Co-op and condo abatement, with no end date, a $19,671 credit this tax year.

## Zoning

R6B: floor area ratio 2.82 built, above the 2.00 base zoning allows, which bonuses, transfers or older rules can permit.

## Recent sales

- Dec 19, 2024: $875,000
- Jan 11, 2023: $550,000
- Jun 28, 2022: $953,350
- Sep 23, 2020: $757,000, Apt 4A
- Feb 26, 2020: $695,000, Apt 3C
- Apr 25, 2019: $790,000
- Dec 11, 2018: $699,000
- Sep 12, 2017: $685,000
- Jul 18, 2017: $759,000

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

## Flood zone

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

## Landmarks

Part of Park Slope Historic District Extension (Historic District). 7 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