It was initially built between 1972 and 1975, after years of planning and engineering. The first interchange, at Wellington Street, was opened 25 years later in 2001. In late 2013, a second interchange was completed at Laird Road. The Government of Ontario has announced plans to build a new Highway 7 freeway bypass joining the current northern terminus of the Hanlon Expressway to the Conestoga Parkway in Kitchener; in-line with this work, the Hanlon Expressway will be upgraded to 400-series standards. Long-term plans call for a potential extension south of Highway 401 to meet Highway 6 south of Freelton.