Swan had been in merger talks with Bassendean since June, only to be told by the Government last month that it should link with Mundaring.
But at a council meeting on Tuesday, the City voted to submit a revised proposal to the Local Government Advisory Board to bring Mundaring and Bassendean into the fold.
It nominated councillors Mel Congerton and Joe Marino to represent the City on a local implementation committee, which will have an equal number of representatives from each council being amalgamated.
Minister for Local Government Tony Simpson ruled last month that the number of local governments in the Perth metropolitan area would be cut from 30 to 14.
He proposed that Bassendean merge with the City of Bayswater.
At its meeting last week, the Shire of Mundaring voted to submit a proposal that was in line with the Government’s recommendation to merge with Swan.
Councillor Darrell Jones spoke against the motion and said Mundaring’s East Ward would suffer the most from an amalgamation.
Shire of Mundaring chief executive Jonathan Throssell said he was not surprised by the new three-way amalgamation proposal, but was disappointed that Swan and Mundaring could not work together on any plan.
‘I will have to take this back to my council and we will discuss whether to amend our submission or submit another proposal,’ he said.
Bassendean Mayor John Gangell said the Town was in discussions with Bayswater about a possible amalgamation, but had not ruled out merging with Swan and Mundaring.