366 Madison Avenue, Manhattan
Commercial · built c. 1921 · Block 1281, Lot 56.
Building permits
- Alteration, filed Oct 20, 2026, estimated cost $50K, described as “Disconnection of existing piping from existing boiler.”
- Alteration, filed Sep 29, 2026, estimated cost $3K, described as “Installation of a temporary Material hoist per plan submitted. Work shall comply with 2022 building codes chapter 33. No change in use, egress and/or occupancy with this application.”
- Alteration, filed Sep 8, 2026, estimated cost $30K, described as “Filing for obtaining certificate of compliance of existing a/c. No change in use, egress, or occupancy under this filing.”
- Alteration, filed Jun 17, 2026, estimated cost $3K, described as “Installation of a temporary construction fence per plan submitted. Work shall comply with 2022 building codes chapter 33. No change in use, egress and/or occupancy with this application.”
- Alteration, filed Mar 3, 2026, estimated cost $227K, described as “Proposed window replacement on 1ST to 16TH fl & roof bulkhead. No change in use, egress and occupancy.”
- Alteration, filed Dec 16, 2025, estimated cost $5K, described as “Installation of a temporarily supported scaffold and heavy-duty sidewalk shed per plan submitted. Work shall comply with 2022 building codes chapter 33. No change in use, egress and/or occupancy with this application.”
- Alteration, filed Nov 13, 2025, estimated cost $446K, described as “Interior removal on floors 2, 4, 6, 10, 11, 12, 14, 16 only. No change in use, egress and occupancy.”
- Alteration, filed Nov 26, 2024, estimated cost $74K, described as “Replace one (1) 15-ton water cooled heat pump unit as per plans. No change in use, egress or occupancy.”
- Alteration, filed Nov 2, 2023, estimated cost $280K, described as “Interior modifications to 10th floor as per shown on plans filed herewith. No change in egress, occupancy, or use.”
- Alteration, filed Apr 6, 2021, estimated cost $34K, described as “Modifications to the existing HVAC system; Re-distribution of ductwork and install new grills on the 10th Floor as per plans (LL Work/ Interior Renovations.) No change to use, egress or occupancy.”
- Alteration, filed Apr 6, 2021, estimated cost $188K, described as “Minor interior demolition. Installation of new floor finishes, suspended ceilings, radiator covers and finishes as per plans. No change to use, egress or occupancy.”
- Alteration, filed Apr 2, 2021, estimated cost $81K, described as “Modification to exiting HVAC System; Replacement of AC Unit and associated ductwork and piping on the 15th Floor MER as per plans (LL Work/ Ponte Gadea.) No change to use, egress or occupancy.”
- Alteration, filed Sep 25, 2020, estimated cost $10K, described as “#8348 - Replacing steam generator for commercial press. No change in egress, use, or occupancy.”
- Alteration, filed Sep 25, 2020, estimated cost $1K, described as “#8348 - Remove and cap gas line. Gas boiler replaced by electric boiler under application #M00335218. No change in egress, use, or occupancy.”
- Alteration, filed Sep 23, 2020, estimated cost $1K, described as “Installation of temporary heavy duty sidewalk shed as per plans. No change in use, egress or occupancy. Sidewalk shed shall comply with chapter #33 of the NYC building code. Live load 300PSF.”
- Alteration, filed Apr 16, 2020, described as “Installation of sidewalk shed as per plans. No change in use, egress or occupancy.”
- Alteration, filed Mar 23, 2020, estimated cost $23K, described as “Modifications to the existing HVAC system and installation of new duct work to accommodate new layout design as per plans (LL Work - Interior Renovation.) No change to use, egress or occupancy.”
- Alteration, filed Mar 20, 2020, estimated cost $7K, described as “Modifications to the existing Sprinkler System: Install five (5) new sprinkler heads, relocate eight (8) and replace (1) existing sprinkler heads and associated piping as per plans (LL Work - Interior renovation.) No change to use, egress…”
- Alteration, filed Nov 5, 2019, estimated cost $455K, described as “Filing to repair/replace existing deteriorated steel beam as per site conditions. Plans uploaded herewith. No change in use, egress, or occupancy under this application.”
- Alteration, filed Aug 29, 2019, estimated cost $47K, described as “Installation of four (4) lavatories, four (4) water closets, one (1) urinal and two (2) sinks and associated piping on the 14th Floor as per plans. (Renovation.) No change to use, egress or occupancy.”
- Alteration, filed Aug 29, 2019, estimated cost $192K, described as “Modifications to the existing HVAC system, installation of new AC Unit and associated duct work and piping as per plans (Renovation.) No change to use, egress or occupancy.”
- Alteration, filed Aug 27, 2019, estimated cost $7K, described as “Modifications to the existing Sprinkler System as per plans (Lobby Renovation.) No change to use, egress or occupancy.”
- Alteration, filed Aug 27, 2019, estimated cost $87K, described as “Modifications to the existing HVAC system as per plans (Lobby Renovation.) No change to use, egress or occupancy.”
- Alteration, filed Aug 19, 2019, estimated cost $62K, described as “Installation of new canopy and structural supports as per plans ( Lobby Renovation.) No change to use, egress or occupancy.”
- Alteration, filed Mar 19, 2019, described as “Installation of pipe scaffold as per plans. No change in use, egress or occupancy.”
8 more, older permits are in this building’s full list on the map.
Property taxes
- Assessment
- $15,265,800
- 2026–27 tax
- $1,636,438
- Market value (city estimate)
- $33,924,000
- Taxable value
- $15,085,160
- Assessed land
- $3,145,500
- Assessed improvements
- $12,120,300
Zoning
C5-3: floor area ratio 14.03 built, 15.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Oct 21, 2025: $50,000,000
Open-market sales since 2016, from the Department of Finance’s sales files.
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…