W William St, Port Chester
- 411 W William St Barriga Diomedes D
- 412 W William St Ignacio, Agustin Solano
- 413 W William St Aguirre, Armando
- 416 W William St Markowitz, Lipa
- 417 W William St Cruz Ugarte Juan Carlos
- 420 W William St Vintimilla, Jaime Ivan
- 425 W William St Jodi, Llc
- 426 W William St Marino, Paul D
- 429 W William St Bonds, Jeffrey
- 432 W William St Paltin Chabla Segundo Jose
- 433 W William St Nethercott, William G Jr
- 434 W William St Marro, Bartholomew T
- 435 W William St Nethercott, William G Jr
- 438 W William St 438 Dem Bros Llc
- 439 W William St Mariscal, Genesis
- 440 W William St D1 Properties Llc
- 452 W William St 452 W William Street Llc
- 467 W William St Reyes Cedillo Edison F
- 470 W William St 470 West William Street Llc
- 471 W William St Chavez, Gregorio
- 472 W William St Bencosme, Stanley
- 473 W William St William Street Realty Llc 473 West
- 474 W William St Martinez, Remedios
- 475 W William St Varghese, Sunil
- 476 1/2 W William St Arminio, Mario
- 476 W William St 476 West William St Realty Llc
- 477 W William St Ianello Andrea
- 478 W William St Reilly, Margaret A
- 480 W William St 480 West William Street Llc
- 482 W William St Bobalu Rye Brook Llc
- 486 W William St Garcia, Dora Luz
- 490 W William St Caruso Vincent