# 50 Riverside Boulevard, Manhattan

Condominium · 274 units · built 2013 · Block 1171, Lot 7509.

On Umarelli: https://umarelli.org/nyc/1011717509/50-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 Jun 8, 2026, estimated cost $240K, described as “The partial renovation of apartment 26B consisting of bathroom renovations and adjustments to non-load bearing interior partitions. No change to use, egress, or occupancy.”
- Alteration, filed Jul 18, 2025, estimated cost $200K, described as “Renovation of existing apartment as per plans herewith.”
- Alteration, filed Feb 6, 2025, estimated cost $146K, described as “Apt. 18C: remove non structural partitions, relocate bedroom door, modify existing GWB ceiling, add new dropped GWB ceiling, replace kitchen cabinetry doors, replace kitchen backsplash, paint throughout”
- Alteration, filed Aug 14, 2024, estimated cost $100K, described as “General consturction work to apartment 18B as per plans filed herewith. No change to use, egress or occupancy.”
- Alteration, filed Apr 11, 2024, estimated cost $150K, described as “Interior renovation to combine two adjacent condo units 19D & 19E on 19TH floor. The combination work shall be in accordance with local law 77 of 1968 and the guidance set forth in tppn #3/97.architectural work. No change in use,…”
- Alteration, filed Oct 16, 2023, estimated cost $198K, described as “Modifications of the 7th floor roof deck with proposed new pergola, new pavers and new kitchen island. No change in use, egress or occupancy.”
- No Work, filed Sep 22, 2023
- Alteration, filed Jun 19, 2023, estimated cost $20K, described as “Interior mechanical work related to ductwork and ventilation on the 23RD floor. As per plans filed herewith. No change to use, egress or occupancy.”
- Alteration, filed Jun 5, 2023, estimated cost $360K, described as “Architectural renovations on the 23rd floor. Work to include the alteration of existing kitchen, bathrooms and laundry room as per plans filed herewith. No change to use, egress or occupancy.”
- Alteration, filed May 22, 2023, estimated cost $100K, described as “Sprinkler filing as per plans.”
- Alteration, filed May 19, 2023, estimated cost $1.5M, described as “Conversion of existing interior ground-level retail space into auxiliary academic and extracurricular activity space for Collegiate School”
- Alteration, filed Aug 25, 2022, estimated cost $30K, described as “Modify existing roof terrace as shown on plans. Additional planters and plants.”
- Alteration, filed Sep 15, 2021, estimated cost $18K, described as “Demolition of interior non-load bearing partitions, floor and ceiling finishes and display fixtures. No change in building bulk, floor area, egress, use or occupancy.”
- Alteration, filed Sep 15, 2021, estimated cost $700, described as “Existing plumbing fixtures to be removed and piping to be cut back to the building riser. No change to building bulk, floor area, egress, use or occupancy.”
- Alteration, filed Sep 15, 2021, estimated cost $18K, described as “Existing air handlers and all equipment, mechanical ductwork, piping, supports, and accessories to be demolished. No change to building bulk, floor area, egress, use or occupancy.”
- Alteration, filed Jan 12, 2021, estimated cost $3K, described as “Minor Remodeling of an Outdoor Kitchen at the Roof Level with an extension of an existing rooftop and new gas grill adjacent to an existing gas grill. No change to use, egress or occupancy.”
- Alteration, filed Dec 16, 2020, estimated cost $1K, described as “Provide curb cut at west 62ND street public access easement in conjunction with NB # 121181363. No change in use, egress or occupancy.”
- Alteration, filed Dec 7, 2020, estimated cost $5K, described as “Installation of Gas Piping & New Commercial BBQ. As per plans filed herewith. No change to use occupancy or egress.”

## Property taxes

- Assessment: $101,618,705
- 2026–27 tax: $322,343
- Market value (city estimate): $225,819,329
- Taxable value: $2,600,634
- Assessed land: $19,576,354
- Assessed improvements: $82,042,351
- Condo units with their own tax lots: 223

## Tax breaks

- 421-a exemption, through Jun 30, 2037, about $12,191,682 a year below the full tax.

## Zoning

R10: floor area ratio 12.09 built, above the 10.00 base zoning allows, which bonuses, transfers or older rules can permit.

## Recent sales

- Aug 17, 2026: $2,450,000, Apt 9H
- Jul 15, 2026: $5,350,000, Apt 9L
- Jul 6, 2026: $6,550,000, Apt 10L
- Sep 25, 2025: $17,988,000, Apt PH2A
- Sep 9, 2025: $1,315,000, Apt 4R
- Aug 22, 2025: $7,200,000, Apt 28A
- Aug 5, 2025: $2,036,500, Apt 4E
- Jul 25, 2025: $2,300,000, Apt 19F
- Mar 7, 2025: $744,375, Apt 16D
- Nov 13, 2024: $2,900,000, Apt 18C

The 10 most recent of 111 open-market sales since 2016, from the Department of Finance’s sales files.

## Flood zone

Current FEMA flood map: zone AE, high risk: a 1% chance of flooding each year, base flood elevation 10 ft (NGVD29). FEMA’s preliminary 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