J.A. Macdonald Ltd. has worked with Developers, General Contractors and Owners for nearly 50 years, earning a reputation for quality and safety along the way. Located in London, Ontario, J.A. Macdonald serves an area bounded by Owen Sound to the North, Mississauga to the East, and Windsor to the West.As a family-owned business, J.A. Macdonald is dedicated to customer satisfaction. Our unionized workforce has consistently maintained a strong safety record, and it is due to our highly-trained staff that we are regarded as leaders in our field. more... See more text