Property developer, former politician and aspiring filmmaker Salim Mehajer has had another business win after doubling his money on a property on which he voted to increase the size of when a councillor.

The modest two-storey office block owned by a Mehajer family company was sold in May for $8 million, the Australian newspaper reported on Tuesday.

The land had been bought by the Mehajer Bros company for less than half that sum in 2012.

But estate agents had been boasting of a potential development on the site of up to 50 metres.