# 834 Riverside Drive, Manhattan

Co-op · 31 units · built c. 1921 · Block 2136, Lot 18.

On Umarelli: https://umarelli.org/nyc/1021360018/834-riverside-drive

More construction in Washington Heights: https://umarelli.org/nyc/manhattan/washington-heights.md

Every lot on block 2136: https://umarelli.org/nyc/manhattan/2136.md

## Building permits

- Alteration, filed Mar 4, 2025, estimated cost $1.6M, described as “Masonry restoration including face brick rebuilding & repointing, window lintel & window sill replacement, localized parapet rebuilding, roof & window replacement and installation of new doors at building entrance. No change to use,…”
- Alteration, filed May 15, 2023, estimated cost $9K, 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 Oct 28, 2021, estimated cost $78K, described as “Replace boiler and oil burner as per plans. No change in use, egress or occupancy.”
- Alteration, filed Oct 28, 2021, estimated cost $30K, described as “Install new chimney liner in existing masonry chimney as per plans. No change in use, egress or occupancy.”
- Alteration, filed Nov 5, 2020, estimated cost $83K, described as “Installation (replace) of (1)low pressure steam boiler (#2 fuel oil) and (2) domestic how water heaters (#2 fuel oil) as per plan”

## Property taxes

- Assessment: $1,232,100
- 2026–27 tax: $54,344
- Market value (city estimate): $2,738,000
- Taxable value: $436,883
- Assessed land: $201,150
- Assessed improvements: $1,030,950

## Tax breaks

- Article XI exemption, through Jun 30, 2029, about $98,917 a year below the full tax.

## Zoning

R8: floor area ratio 3.32 built, 6.02 allowed by base zoning.

## Recent sales

- Aug 14, 2026: $295,000
- Sep 25, 2025: $294,000
- Sep 24, 2025: $349,999
- Aug 29, 2025: $499,999
- Mar 24, 2025: $360,000
- Feb 6, 2025: $365,000
- Feb 6, 2025: $349,000
- Sep 27, 2024: $395,000
- Dec 5, 2022: $205,000
- Oct 6, 2021: $345,000

The 10 most recent of 13 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