# 100 Riverside Boulevard, Manhattan

Condominium · 266 units · built 2006 · Block 1171, Lot 7505.

On Umarelli: https://umarelli.org/nyc/1011717505/100-riverside-boulevard

More construction in Upper West Side: https://umarelli.org/nyc/manhattan/upper-west-side.md

Every lot on block 1171: https://umarelli.org/nyc/manhattan/1171.md

## Building permits

- Alteration, filed Jan 12, 2026, estimated cost $20K, described as “Unit 28E interior renovation. Remove and install non-bearing partition walls. No change in use, occupancy, or egress under this application.”
- Alteration, filed Sep 24, 2025, estimated cost $60K, described as “Interior renovation of existing apt #19B including flooring finish and kitchen cabinet. No change in use, egress, and occupancy.”
- Alteration, filed Aug 4, 2025, estimated cost $200K, described as “Hereby filing for the renovation of unit 18C. No change in use, egress or occupancy.”
- Alteration, filed Oct 30, 2023, estimated cost $228K, described as “Combination of apts 20E and 20F under tppn 3/97. No change to use, occupancy or egress.”
- Alteration, filed Jan 19, 2023, estimated cost $20K, described as “Filing herewith drawings indicating the modification to the existing plumbing systems. No change is use, egress, or occupancy under this application.”
- Alteration, filed Jan 17, 2023, estimated cost $125K, described as “Filing herewith drawing indicating interior renovation to apartment 19D on the 19th floor. No change in use, egress or occupancy.”
- Alteration, filed Aug 2, 2022, estimated cost $42K, described as “Interior renovation at apt 6R. Remove and construct of non bearing or non structural partitions. No change in use, egress or occupancy.”
- Alteration, filed Aug 2, 2022, estimated cost $4K, described as “Minor plumbing work at APT6R. No change in use, egress or occupancy.”
- Alteration, filed Jun 22, 2021, described as “Installation of temporary sidewalk shed 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 Jun 7, 2021, estimated cost $597K, described as “Facade repair including repair of deteriorated masonry conditions as indicated on the attached drawings. No change to egress, use or occupancy”

## Property taxes

- Assessment: $70,016,021
- 2026–27 tax: $7,303,816
- Market value (city estimate): $155,591,133
- Taxable value: $65,478,900
- Assessed land: $3,217,507
- Assessed improvements: $66,798,514
- Condo units with their own tax lots: 270

## Tax breaks

- Co-op and condo abatement, with no end date, a $787,312 credit this tax year.

## Zoning

R10: floor area ratio 10.89 built, above the 10.00 base zoning allows, which bonuses, transfers or older rules can permit.

## Recent sales

- Sep 17, 2026: $1,700,000, Apt 7G
- Sep 9, 2026: $1,465,000, Apt 5H
- Jul 1, 2026: $2,500,000, Apt 23D
- Jun 18, 2026: $1,335,000, Apt 5C
- Jun 11, 2026: $960,000, Apt 14J
- Jun 4, 2026: $950,000, Apt 8J
- Jun 1, 2026: $2,400,000, Apt 12F
- May 21, 2026: $1,948,500, Apt 14N
- May 6, 2026: $935,000, Apt 9B
- Mar 30, 2026: $4,300,000, Apt 22B/C

The 10 most recent of 138 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