The new season of Grand Designs Australia opens with a one hour special Kevin McCloud's Top 10 Grand Designs Australia premiering Thursday, April 20 at 8.30pm on Foxtel's Lifestyle.Set in historic Homewood House in Surrey, England, Grand Designs Australia host Peter Maddison and Grand Designs host Kevin McCloud sit down with a cup of tea and an old fashioned slide slow to reminisce about the design features of each of the ten homes, selected from the past six seasons.The design gurus talk cladding, tiles and form, and with whisky in hand, engage in some gentle banter over each other's take on the architecture of their favourite builds. While the special looks over the past, it also serves as a teaser for the upcoming seventh season.