Dust, flies and a finicky guest converge on the rocky landscape of remote Coober Pedy for a stay at Razz and Mark's unusual underground digs.

Breathtaking views and an abundance of dachshund-themed decor await at the Sunshine Coast penthouse owned by mother-and-son team Debbie and Justin.

In Tropical North Queensland, Gene and Sharon offer a clothing-optional rainforest oasis with a doorless bathroom and its own Fountain of Youth.

With the $100,000 prize on the line, the finalists ponder how to transform their property based on the feedback they received.

Tensions run high and tears threaten during the grand finale as the teams join judges Laurence Llewelyn-Bowen and Juliet Ashworth to name the winner.