# 9 Prospect Park West, Brooklyn

Co-op · 41 units · built c. 1929 · Block 1068, Lot 37.

On Umarelli: https://umarelli.org/nyc/3010680037/9-prospect-park-west

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

Every lot on block 1068: https://umarelli.org/nyc/brooklyn/1068.md

## Building permits

- Alteration, filed Mar 2, 2026, estimated cost $140K, described as “Interior renovation to apartment 5C as per plans.”
- Alteration, filed Oct 30, 2025, estimated cost $85K, described as “Select interior renovation of existing apartment 15B, including renovationof kitchen and one bathroom. Demo and construct non-bearing interior partitions and finishes. No change to use, egress or occupancy.”
- Alteration, filed Aug 7, 2024, estimated cost $22K, described as “Propose installation of multi-split systems and mechanical recirculating hood for kitchen of dwelling unit. All installations to take place within apartment 8B on the 8TH floor. No change in use, egress, or occupancy under this filing.”
- Alteration, filed Jul 23, 2024, estimated cost $38K, described as “Propose to renovate existing apartment #8B: new kitchen, bathrooms, bedrooms, laundry closet with minor partitions interior finished works per plan. No change in use, egress, and occupancy.”
- Alteration, filed Jul 23, 2024, estimated cost $65K, described as “Propose to renovate existing APARTMENT#8B for new kitchen, bathrooms, bedrooms, laundry closet with minor partitions, interior finished works per plan. Related plumbing under #B01033661, mechanical under #B01033662. No change in use,…”
- Alteration, filed May 8, 2024, estimated cost $18K, described as “Hereby filing this application to propose a new laundry room located in the cellar as an accessory use to the building as per plans submitted. This app does not require a new or amended cert. Of occupancy as there is no change in use,…”
- Alteration, filed Mar 4, 2024, estimated cost $24K, described as “File application for renovation of 1ST floor apartment (apt# 1C) as per plan. No change in use, egress and occupancy.”
- Alteration, filed Feb 28, 2024, estimated cost $36K, described as “Plumbing work on the first floor. converting doctor's office to residential unit.”
- Alteration, filed Feb 28, 2024, estimated cost $127K, described as “Amend CO at the 1st floor only . Convert one doctor's office to apartment.”
- Alteration, filed Jan 18, 2023, estimated cost $1K, 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 Aug 11, 2022, estimated cost $1.2M, described as “Exterior restoration: brick replacement, caulking replacement, lintel replacement, juliet balcony reconstruction and misc repairs as per plan. No change in use, egress or occupancy”
- Alteration, filed Feb 26, 2022, 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 the nycbuilding code. Live load 300PSF”
- Alteration, filed Nov 18, 2020, 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 the NYC building code. Live load 300 psf”
- Alteration, filed Oct 19, 2020, estimated cost $9K, described as “Steel column replacement as per plans submitted herewith. No change in use, occupancy or egress”
- Alteration, filed Oct 17, 2019, estimated cost $5K, described as “Modification of existing HVAC ductwork.”
- Alteration, filed Oct 8, 2019, estimated cost $5K, described as “Modification to existing plumbing system to add plumbing fixtures.”

## Property taxes

- Assessment: $8,874,000
- 2026–27 tax: $802,891
- Market value (city estimate): $19,720,000
- Taxable value: $7,672,240
- Assessed land: $229,950
- Assessed improvements: $8,644,050

## Tax breaks

- Co-op and condo abatement, with no end date, a $151,501 credit this tax year.

## Zoning

R8X: floor area ratio 12.31 built, above the 6.02 base zoning allows, which bonuses, transfers or older rules can permit.

## Recent sales

- Jun 23, 2026: $2,450,000
- Jul 7, 2025: $4,343,000
- Jun 12, 2025: $3,400,000
- Mar 5, 2024: $3,600,000
- Dec 14, 2023: $2,300,000
- Jul 7, 2022: $2,075,000
- May 27, 2022: $3,945,000
- Sep 21, 2021: $3,650,000
- Jul 14, 2021: $2,850,000
- Jun 16, 2021: $2,310,000

The 10 most recent of 17 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