The eyesore shell, which greets visitors just off the ferry, has been lying vacant since South Ayrshire Council shut the facility down.
Councillor Philip Saxton said a business is keen to open up the toilets again as well as a kiosk.
Previous negotiations with the Marina Cafe owners fell through after it closed down but now another firm is interested.
Councillor Saxton said: “We have people coming off the Troon and there are no facilities available for them to use.
“We want this re-opened as a public conveniences.” He was shocked to hear the council had put the building up for lease or sale again without telling local councillors.
He said: “There is no need to put this out to tender again. It has already been put out twice before. It is a waste of time.
“At one five people were interested. The longer this goes on the more dilapidated the toilets will become.”
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