That figure was well above the $38 million it was projected to cost two years ago.
On Friday the City’s finance director, Stuart Downing, said the correct figure was $44.9 million, but did not produce the official breakdown of contributions.
An increase was expected after the original builder ” Gavin Construction ” went into voluntary administration in mid-2013, although the City was confident that would not be the case.
Get in front of tomorrow's news for FREE
Journalism for the curious Australian across politics, business, culture and opinion.
READ NOWBut eyebrows were raised when the long-awaited facility, which officially opened on October 24, was promoted in a media statement as having cost $14 million more than expected.
The statement put the City’s contribution at $45 million, with the Commonwealth Government’s $6.5 million and $500,000 from Lotterywest taking the total to $52 million.
A City representative said the City was tied up with local government meetings but would be able to explain the figure this week.
Cockburn MLA Fran Logan said he had been surprised after hearing the cost of the facility had passed the $50 million mark.
He said he spoken with CEO Stephen Cain after the opening of the medical hub. He said Mr Cain admitted the figure was wrong and gave him an informal breakdown of the costs.
‘At the time I was satisfied with the explanation by the CEO,’ he said.