Bel and John are building a radical underground house on 25 spectacular acres at Whittlesea, in Victoria's Plenty Valley

Sonali Shah's search for her buyers' perfect town in West Sussex is very much a voyage of discovery and gives them a much-needed reality check on the right place for them to spend their '900,000 on their perfect property.

Janice and Mark have catered all their main living spaces to their kids. But with the kids grown up, Jonathan and Drew revamp the house to make optimal use of the space.

Kirstie and Phil are back visiting two sets of house hunters where the challenges on the search were second to none.