# 809 Madison Avenue, Manhattan

Condominium · 11 units · built c. 1925 · Block 1382, Lot 7502.

On Umarelli: https://umarelli.org/nyc/1013827502/809-madison-avenue

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

## Building permits

- Alteration, filed Aug 30, 2026, described as “Facade inspection with minor caulking and pointing”
- Alteration, filed Aug 4, 2026, estimated cost $81K, described as “NYC DEV HUB CONSULT: 7/18/25 Structural work to add steel inside existing building as per plans.”
- Alteration, filed Jul 16, 2026, estimated cost $1K, described as “Gantry System installation for Alt 1 work approved under M01262427-I1”
- Alteration, filed Jul 15, 2026, estimated cost $3K, described as “Installation of system stair pipe scaffold required for egress as per plans. Scaffold shall comply with chapter #33 of the 2022 code. No change in use, egress or occupancy under this application.”
- Alteration, filed Mar 16, 2026, described as “Installation of suspended scaffold for facade work or inspection.”
- Alteration, filed Mar 10, 2026, estimated cost $1K, described as “DevHUB Consultation 7.18.2025. Temporary bracing in conjunction with Alt CO M01262427-I1.”
- Alteration, filed Feb 2, 2026, estimated cost $26K, described as “Installation of temporary needle beams as per plans. Needle beams shall comply with chapter #33 of the 2022 code. No change in use, egress or occupancy under this application.”
- Alteration, filed Jan 20, 2026, estimated cost $20K, described as “Installation of 7,100 lb dual personnel hoist cars as per plans during construction. Hoist shall comply with chapter #33 of the 2022 code. No change in use, egress or occupancy under this application.”
- Alteration, filed Dec 18, 2025, estimated cost $15K, described as “Installation of temporary dry pressurized standpipe & removal of existing standpipe in association with alteration, by others. Temporary standpipe to be removed after premenatnt standpipe is installed, by others. No change to use, egress,…”
- Alteration, filed Dec 12, 2025, estimated cost $50K, described as “DevHUB Consultation 7.18.2025. Application filed for new openings and repair on existing facade and select interior demolition as noted in plans. No change in use, egress or occupancy.”
- Alteration, filed Nov 10, 2025, estimated cost $17K, described as “Installation of temporary roof protection over adjacent properties as per plans. Roof protection shall comply with chapter #33 of the 2022 code. No change in use, egress or occupancy under this application.”
- Major Renovation — Mid-Rise, filed Oct 30, 2025, estimated cost $12.0M, 12 units in all, 14 stories, described as “DevHUB Consultation 7.18.2025 @2pm. Application filed to enlarge building horizontally and vertically.”
- Alteration, filed Oct 15, 2025, estimated cost $26K, described as “Installation of pipe scaffolding as per plans. Pipe scaffold shall comply with chapter #33 of the 2022 code. No change in use, egress or occupancy under this application.”
- Alteration, filed Sep 30, 2025, estimated cost $17K, described as “Installation of heavy duty sidewalk shed and construction plywood fence as per plans. Temporary equipment shall comply with chapter #33 of the 2022 code. No change in use, egress or occupancy under this application.”
- Alteration, filed May 9, 2025, estimated cost $1K, described as “Proposed installation of temporary pipe scaffold as per plans. Work shall comply with chapter #33 of 2022 the NYC building code. No change in use, occupancy, or egress under this application.”

## Property taxes

- Assessment: $8,582,400
- 2026–27 tax: $1,041,967
- Market value (city estimate): $19,072,000
- Taxable value: $8,498,226
- Assessed land: $1,323,000
- Assessed improvements: $7,259,400
- Condo units with their own tax lots: 3

## Zoning

C5-1: floor area ratio 9.20 built, 10.00 allowed by base zoning.

## Recent sales

- Sep 18, 2025: $49,000,000, Apt RET 2, sold with other lots
- Nov 7, 2024: $9,000,000, Apt RET 1

Open-market sales since 2016, from the Department of Finance’s sales files.

## Flood zone

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

## Landmarks

Part of Upper East Side Historic District (Historic District). 10 Landmarks Preservation Commission permits are on file.

## In the news

[Renderings Revealed for 809 Madison Avenue’s Expansion on Manhattan’s Upper East Side](https://newyorkyimby.com/2025/09/renderings-revealed-for-809-madison-avenues-expansion-on-manhattans-upper-east-side.html), New York YIMBY, Sep 24, 2025.

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