Fees for basic real estate transactions could skyrocket if the state government goes ahead with plans to lease the land titles registry, an expert has warned.

The Andrews' government is assessing a proposal to lease out Land Use Victoria, the government agency that keeps records of land ownership, in a deal that could see up to $2 billion flow into the state's coffers.

Land Use Victoria keeps records of land ownership across the state. Credit:Glen McCurtayne

But the state's former surveyor-general Keith Clifford Bell told Fairfax he had a "hell of a lot" of concerns about a private sector player taking over the registry.

He said private operators had hit consumers with fee increases of more than 300 per cent after similar deals overseas, according to Dr Clifford Bell.