Building permitNew York CityPermit Entire

520 Madison Avenue Manhattan

Alteration CO permit in New York City, issued May 27, 2026. Permit #M01355353-S1.

$5.5M
DECLARED VALUE
Permit Entire
STATUS
May 27, 2026
ISSUED
March 23, 2026
FILED

Permit details

Permit numberM01355353-S1
Address520 Madison Avenue Manhattan, 10022
Permit typeAlteration CO
Work descriptionFloor: Floor Number(s) 028 through 028, Floor Number(s) 029 through 029
ApplicantJOHN SADLON

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Source: New York City official permit records (New York City Department of Buildings (DOB)), retrieved by The Permit Sheet. Verify current status with the issuing department via DOB NOW Public Portal before relying on it.