Two teams of design veterans and two teams of rookies create new kitchens and living rooms as the renovation competition kicks off, but as surprising delivery gets dropped off and Bobby Berk joins as a judge.

In Week Two, the teams bring their A-games as they race to finish the rest of their first-floor spaces. HGTV stars Jasmine Roth and Mina Starsiak-Hawk come to judge and determine whose work wins the week.

It's Week Three and the teams tackle their main suites and make massive moves as some desperately seek their first win. "Divided by Design" stars Eilyn and Ray Jimenez judge the stunning spaces.

Ty Pennington challenges the teams with their toughest obstacle yet: transform a bonus loft and staircase in only 48 hours. All work and no sleep pushes the teams' creativity, and, in a twist, the teams judge each other's spaces and pick a winner.

It's Week Five and creativity is king as the teams head downstairs to design their lower levels, complete with kitchens and unfinished spaces. "Battle on the Mountain" star Kim Myles arrives to judge the artistic endeavors.

It's snowing in Week Six, but the competition heats up and heads into the backyard where teams need big ideas to fill a big space. Bigger is better this week as Rock the Block reigning champions Lyndsay Lamb and Leslie Davis return as judges.