John Pitt

All four couples this week have the mammoth task of completing their main bathrooms and laundries, and the downstairs apartment become suspicious that their upstairs neighbours may be cheating.

Four couples move into four identical apartments with little more than the clothes they are wearing. With equal-sized budgets of $80,000 they have just eight weeks to out-design, out-decorate and out-renovate each other.

After eight weeks of renovations all four apartments will go to public auction. The couple who make the most above reserve will also win $100,000.

In this final week of their renovation, the four teams have to produce their toughest rooms yet, with just seven days to create a prize-winning kitchen, and have their apartments ready for public auction next week.

The four couples race to finish their first bedroom. Then it's judgement day as the first room prize is awarded to the winning team.

The Four couples' renovations are now well underway. They have to deliver their guest bedroom, but host Scott Cam has another surprise that will make that task even harder.