What was permitted
Businesses and property owners in the Upper East Side-Carnegie Hill neighborhood can examine the permit for interior renovations at 645 Madison Avenue. This project involves an office build-out, as detailed in the accompanying plans.
The permit for this significant interior renovation was issued on April 29, 2026, with an estimated cost of $700,000. SENTINEL BUILDERS, LLC is the General Contractor for this extensive office build-out.
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View the official permit record
Tracking number, work description, cost and dates
View the official permit record
Tracking number, work description, cost and dates
| Tracking number | 970568725 |
|---|---|
| Work permit # | M01385453-I1-GC |
| Job filing number | — |
| Work type | General Construction |
| Status | Permit Issued |
| Job description | APPLICATION FILED HEREWITH FOR INTERIOR RENOVATIONS for office build out as per plans filed herewith. |
| Floor / unit | Floor Number(s) 016 through 016 |
| Estimated cost | $700,000 |
| Approved | April 27, 2026 |
| Issued | April 29, 2026 |
| Expires | July 23, 2026 |
| BBL | — |
| BIN | — |
Property owner
NG 645 Madison Ave LLC
Keith Colton
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