Office to Residential Conversion at 100 William Street, Manhattan
100 WILLIAM STREET, MANHATTAN, 10038 · Financial District-Battery Park City
What was permitted
Property owners and developers in the Financial District considering large-scale conversions will find this permit informative regarding the costs of transforming office buildings into residential spaces. This project entails converting an office occupancy to a residential (R-2) occupancy, a significant undertaking.
Issued on June 23, 2026, this permit has an estimated project cost of $88,791,360, highlighting the investment required for such a conversion. Bushburg Builders LLC is listed as the General Contractor for this major development.
Converting office buildings to residential units in Manhattan's Financial District is a multi-million dollar endeavor, with this project estimated at nearly $89 million.
What it cost
Issued
June 23, 2026
Expires
July 18, 2026
License
General Contractor
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Filed by BUSHBURG BUILDERS LLC · 9 permits across 2 neighborhoods
View the official permit record
Tracking number, work description, cost, and dates
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View the official permit record
Tracking number, work description, cost, and dates
| Tracking Number | 264047915 |
| Work Permit # | M01363617-I1-GC |
| Job Filing Number | — |
| Work Type | General Construction |
| Status | Permit Issued |
| Job Description | CONVERSION FROM OFFICE (B) OCCUPANCY TO RESIDENTIAL (R-2) OCCUPANCY PURSUANT TO ARTICLE I, CHAPTER V OF THE NYC ZONING RESOLUTION AND ARTICLE 7B OF THE NYS MULTIPLE DWELLING LAW FOR RESIDENTIAL CONVERSION. |
| Floor / Unit | Floor Number(s) 1, Floor Number(s) 1, Floor Number(s) 2, Floor Number(s) 3, Floor Number(s) 3, Floor Number(s) 4, Floor Number(s) 5, Floor Number(s) 6, Floor Number(s) 7, Floor Number(s) 8, Floor Numb |
| Estimated Cost | $88,791,360 |
| Approved | June 15, 2026 |
| Issued | June 23, 2026 |
| Expires | July 18, 2026 |
| BBL | — |
| BIN | — |
Property Owner
BUSHBURG BUILDERS LLC
ABRAHAM HOFFMAN