William Street runs from Olive Street opposite Leona Street north to Virginia Street on French Hill.
| Old Address | Post-911 Address | Building Name | Cure Evidence/Notes | |
| Starts at Olive Street | ||||
| 5 William Street | 14 William Street |
 Ebelke Cottage |
DIS 1950 | |
| 8 William Street | 21 William Street |
 Wilson Cottage |
NYC1915, DIS | |
| 9 William Street | 26 William Street |
 Patterson Cottage |
DIS 1912 | |
| 11 William Street | 32 William Street |
 11 William Street |
||
| 11 1/2 William Street | 36 William Street |
 11 1/2 William Street |
DIS | |
| Crosses Neil Street | ||||
| 17 William Street | 46 William Street |
 17 William Street |
||
| 19 William Street | 50 William Street |
 19 William Street |
||
| 21 William Street | 56 William Street |
 21 William Street |
||
| 22 William Street | 59 William Street |
 22 William Street |
DIS | |
| 23 William Street | 60 William Street |
 Weiner Cottage |
DIS 1928 | |
| 29 William Street | 72 William Street |
 29 William Street |
||
| Ends at Virginia Street | ||||
