55 William Street is a condominium located in O'Neill at 55 William Street East, Oshawa. undefinedThere is currently only a single unit available for sale. Scroll down to view photos and additional details of this unit and book a tour to view it in-person. If you’re looking for a specific size or style or unit that’s not currently available, follow the building for automatic updates on newly listed units. Additionally, you can reach out to us and we can help match you with off-market units that more closely match what you’re looking for.