Brisbane City Council’s planning boss has been called "a walking conflict of interest" as he will campaign for a federal seat while remaining in his role as city planning chairman.

Opposition leader Peter Cumming called for the council’s city planning chairman, Julian Simmonds, to stand down from his chairman role immediately following his selection as the LNP’s candidate for the federal seat of Ryan.

Julian Simmonds says he will not stand down from his portfolio following his preselection for the federal electorate of Ryan.

At Tuesday’s city planning committee opposition councillor Jared Cassidy questioned Cr Simmonds on how he would manage real and perceived conflicts of interest while being a candidate for a federal election and still working in the role of city planning chair.

“Will you rule out accepting developer donations through the federal division of the Liberal Party?” he said.