# 100 Park Avenue, Manhattan

Commercial · built 1950 · Block 1275, Lot 27.

On Umarelli: https://umarelli.org/nyc/1012750027/100-park-avenue

More construction in Midtown: https://umarelli.org/nyc/manhattan/midtown.md

## Building permits

- Alteration, filed Oct 7, 2026, described as “Installation of suspended scaffold for facade work or inspection.”
- Alteration, filed Sep 14, 2026, estimated cost $123K, described as “Interior alterations as per plans. No change in use, egress or occupancy.”
- Alteration, filed Sep 10, 2026, estimated cost $62K, described as “Mechanical changes as indicated on plans..”
- Alteration, filed May 19, 2026, estimated cost $150K, described as “Mechanical changes as indicated on plans.”
- Alteration, filed May 19, 2026, estimated cost $225K, described as “Interior demo & reno of non load bearing partitions, walls, doors, ceiling and finishes as indicated on plans.”
- Alteration, filed May 4, 2026, estimated cost $300K, described as “Interior renovation as per plans. No change in use, egress or occupancy”
- Alteration, filed May 1, 2026, estimated cost $150K, described as “Mechanical changes as indicated on plans.”
- Alteration, filed Apr 14, 2026, estimated cost $90K, described as “Interior demo & reno of non-load bearing partitions, walls, doors, ceiling and finishes as indicated on plans.”
- Alteration, filed Apr 1, 2026, estimated cost $45K, described as “Mechanical changes as indicated on plans.”
- Alteration, filed Jan 13, 2026, estimated cost $40K, described as “Mechanical changes as indicated on plans.”
- Alteration, filed Jan 5, 2026, estimated cost $80K, described as “Interior demo & reno of non-load bearing partitions, walls, doors, ceiling and finishes as indicated on plans.”
- No Work, filed Dec 12, 2025
- No Work, filed Nov 17, 2025
- Alteration, filed Sep 24, 2025, estimated cost $2.5M, described as “Mechanical filing as per plans. NO CHANGE IN USE, EGRESS OR OCCUPANCY.”
- Alteration, filed Sep 24, 2025, estimated cost $804K, described as “Plumbing/Sprinkler filing as per plans. NO CHANGE IN USE, EGRESS OR OCCUPANCY.”
- Alteration, filed Sep 24, 2025, estimated cost $5.4M, described as “Installation of non-load bearing partitions as per plans. No change in use, egress or occupancy.”
- Alteration, filed Sep 11, 2025, estimated cost $330K, described as “Interior changes as per plans filed herewith. No change to use, egress or occupancy.”
- Alteration, filed Sep 11, 2025, estimated cost $52K, described as “Modification to Mechanical Systems as per plans filed herewith. No change to use, egress or occupancy.”
- Alteration, filed Sep 11, 2025, estimated cost $7K, described as “Modification to Sprinkler Systems as per plans filed herewith. No change in use, occupancy or egress. Filed in conjunction M01230120, M01235074”
- Alteration, filed Sep 4, 2025, estimated cost $13K, described as “Mechanical changes as indicated on plans; including the installation of (1) Water Cooled Heat Pump.”
- Alteration, filed Aug 14, 2025, estimated cost $30K, described as “Interior demo & Architectural changes as indicated on plans.”
- Alteration, filed Aug 4, 2025, described as “IRA to assist with Condition Assessment.”
- Alteration, filed Jul 29, 2025, estimated cost $4.8M, described as “Filing herewith for office renovation with new conferences rooms, reception area and open workstations as per plans”
- Alteration, filed Jul 29, 2025, estimated cost $13.2M, described as “New office renovation with new offices, open work areas, conference rooms and pantries.”
- Alteration, filed Jul 25, 2025, estimated cost $818K, described as “Modification and Instsllation of sprinkler heads, fire hose cabintet and plumbing fixtures as per plans filed herewith.”

144 more, older permits are in this building’s full list on the map: https://umarelli.org/nyc/1012750027/100-park-avenue.

## Property taxes

- Assessment: $128,276,550
- 2026–27 tax: $13,915,440
- Market value (city estimate): $285,059,000
- Taxable value: $128,276,550
- Assessed land: $24,660,000
- Assessed improvements: $103,616,550

## Zoning

C5-3 (part of the lot is C5-2.5): floor area ratio 20.92 built, above the 15.00 base zoning allows, which bonuses, transfers or older rules can permit.

## Flood zone

Current FEMA flood map: zone X, minimal flood hazard.

## Board and land use applications

- Greater East Midtown - Special Subdistrict (City Planning P2016M0316): Completed, decided Aug 15, 2017. This is an application by NYC Department of City Planning requesting a text amendment to establish the East Midtown Subdistrict and extend the Special Midtown District, and to rezone a half-block area from C5-2 to C5-3 to reinforce the…

## In the news

[12-Year Lease Signed for 100 Park Avenue in Midtown, Manhattan](https://newyorkyimby.com/2026/02/12-year-lease-signed-for-100-park-avenue-in-midtown-manhattan.html), New York YIMBY, Feb 12, 2026.

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