208 Main St. Unionville is a condominium located in Unionville at 208 Main St. Unionville, Markham. undefinedNo units are currently available, but you can follow this building by clicking the heart icon and receive updates on new units as soon as they become available. Additionally, you can reach out to us if you’re looking for something specific and we can help match you with off-market units that match what you’re looking for.