# 423 9th Avenue, Manhattan

Commercial · built 1960 · Block 731, Lot 48.

On Umarelli: https://umarelli.org/nyc/1007310048/423-9-avenue

More construction in Hudson Yards: https://umarelli.org/nyc/manhattan/hudson-yards.md

Every lot on block 731: https://umarelli.org/nyc/manhattan/731.md

## Building permits

- Alteration, filed Apr 25, 2023, estimated cost $6K, described as “The plans enclosed depict the extent, sequence, means and methods for installation of tie-backs to laterally brace the party wall at 423 9TH avenueto facilitate full demolition of the building at 421 9TH avenue. Demo # 123915861”
- Alteration, filed Oct 19, 2020, estimated cost $10K, described as “ATT-Replacement of existing telecommunication antennas with installation of RRH units on roof.All work in compliance with TPPN 5/98.No change to occupancy,use, or egress.”
- Alteration, filed Jun 16, 2020, estimated cost $4K, described as “Modification to at&t site. Install (3) ion-M23 sdars (rrh) with related equipment. All in conformance with tppn 5/98. No change in use, egress, or occupancy.”
- Alteration, filed Nov 26, 2018, estimated cost $18K, described as “AT&T / Replacement of existing telecommunications antennas with replacement of related RRH units on roof. Removal/installation of cabinets in the existing equipment room in cellar. All work in compliance with TPPN 5/98. No change to…”

## Property taxes

- Assessment: $2,304,000
- 2026–27 tax: $230,988
- Market value (city estimate): $5,120,000
- Taxable value: $2,129,310
- Assessed land: $585,000
- Assessed improvements: $1,719,000

## Zoning

C6-4: floor area ratio 1.00 built, 10.00 allowed by base zoning.

## 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