A former Queenstown couple is in the middle of what could be New Zealand's biggest divorce settlement

Sophie Annabelle Biggs and Stephen Timothy Biggs began living together in 2010 and had a child before separating in 2016.

They lived in an 8.6-million dollar home in Closeburn Station - although both now reside in Australia.

That property, with views of Lake Wakatipu and the Remarkables, has been on the market since last year.

Sophie Biggs is seeking half of the couple's relationship property and is also attempting to get a share of the wealth which she says her husband has available to him through trusts and companies that she claims he controls.

Her accountant has estimated that's worth 59-million dollars - but Mr Biggs argues that is at least a 25-million dollar over-valuation.