The front yard and walkway are complete, but the sunroom project is now behind schedule and way over budget. Kate's been splurging on every room. Now, it's Matt's turn. He insists on a heated floor for the sunroom. The couple gives Alexandra a budget of $2000 to make it happen, and she's determined to finish the project at or under budget. While Matt and Simon lay down the floor, Kate and Alex find discounted fabrics for curtains and seating. Kate even helps Matt lay the flooring. And for the first time, Alex delivers a design that costs less than expected.