One-hundred-and-fifty prospective buyers take a tour of the houses. Everyone is keen to hear feedback from people other than the judges. Who is on the right track, and who will be the buyer's choice?
The judges reveal that each contestant's mystery box contains four ingredients which they can barter with one another for. The top four dishes will see their makers cook for immunity in the next episode.
Jane Edmanson revives indoor orchids, Millie Ross visits a sky-high garden, Clarence Slockee meets volunteering native plant enthusiasts and Sophie Thomson explores a horticulturalist's home plant collection.
Teams travel to Western Australia to renovate Tanya and Dave's Perth house, which is big but not functional and in desperate need of an update to bring it into the 21st century.