Andy Burnham is said to be considering radical property tax reforms if he becomes Prime Minister next month.
He has previously supported replacing the council tax paid by most households in England, as well as the stamp duty buyers pay on purchasing a home, with a single annual property tax.
However, scrapping two existing taxes could be a controversial move, given the Government's huge deficit.
It could also upset those who own more expensive homes, as they would likely pay more tax.
Here is what we know about Burnham's ideas on property taxes so far, and who would be affected if they were put into force.
