The area of housing now known as Cardiff was built as a result of Uranium being discovered in Cardiff Township in the early 1950's. Two operating mines were developed.
Bicroft mine was located a couple of kilometres south of the present Hwy 118 and went into production in 1956. At first workers lived in temporary housing built at the mine site. 150 houses were built across the highway to house workers and families in 1956.
Dyno mine was located a few kilometres to the west of the town site. Once again workers lived in temporary housing on site. The Dyno Mine company built an additional 50 houses in 1958 at Cardiff to accommodate their workers and families.
An 8 room school was built in 1956. The Roman Catholic Church was built in 1958, the United Church in 1960, the pool in 1958 and the Royal Canadian Legion in 1965. All these facilities are still serving Cardiff's residents.
The Dyno mine closed in 1960 and their 50 houses were sold off shortly after. Bicroft mine closed in 1963 leaving 150 houses vacant. Bowes and Cocks Realtors held a sales day on May 9, 1964. The target audience was retirees. 39 houses sold that day. The remaining 111 sold over the next 2 months.