# 740 Clarkson Avenue, Brooklyn

Apartment building · 57 units · built 1958 · Block 4851, Lot 1.

On Umarelli: https://umarelli.org/nyc/3048510001/740-clarkson-avenue

More construction in Flatbush: https://umarelli.org/nyc/brooklyn/flatbush.md

Every lot on block 4851: https://umarelli.org/nyc/brooklyn/4851.md

## Building permits

- Alteration, filed Nov 19, 2025, estimated cost $12K, described as “Replacement of existing condensing unit on roof. Replacement of existing air handling unit in existing equipment room in cellar. Removal of spot cool unit. Related lineset. All work in compliance with TPPN 5/98. No change to occupancy,…”
- Alteration, filed Apr 3, 2024, described as “Renewal of SR23-2357 only”
- Alteration, filed Oct 2, 2023, estimated cost $110K, described as “Facade repairs for fl's 1-6 & roof, repoint masonry mortar joints , defective windw lintel, defective window sill. Repl/ defective face brick & defective copping stone , replace defective stucoo & copping clay tiles ., chimney and flue…”
- Alteration, filed Dec 13, 2022, described as “Installation of temporary sidewalk shed as per plans. No change in use, egress or occupancy.”
- Alteration, filed Nov 3, 2022, estimated cost $20K, described as “AT&T - Replacement of existing antennas & RRUs, removal of RRUs on the rooftop (10075112) as per plans. All work is in compliance with TPPN 5/98 & BB 11/21. No change to use, egress or occupancy.”
- Alteration, filed Jun 9, 2021, estimated cost $18K, described as “Modification of existing AT&T site. Replace 9 antennas on the roof. Install 3 RRH units on the roof. Retrofit 2 cabinets on ground floor equipment room.. All in conformance with TPPN 5/98. No change in use, egress, or occupancy”
- Alteration, filed Dec 13, 2017, estimated cost $10K, described as “Modification to existing telecommunications site. Replace antennas with related rrh units on roof. All in conformance with tppn 5/98. No change in use, egress or occupancy.”

## Property taxes

- Assessment: $1,968,750
- 2026–27 tax: $244,893
- Market value (city estimate): $4,375,000
- Taxable value: $1,968,750
- Assessed land: $60,750
- Assessed improvements: $1,908,000

## Zoning

R5: floor area ratio 5.35 built, above the 1.50 base zoning allows, which bonuses, transfers or older rules can permit.

## 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