In each episode, two sets of neighbors redecorate one room in each other's home. The teams have no say over what happens in their own homes, but they are able to give input into what happens in the home they are redecorating. The teams are not allowed to enter their own home for the duration of the show, and the transformed rooms are revealed only at the end of the final day.
Sorry, no info about the next episode of Trading Spaces is available yet.
The TV show is either in vacation or waiting to start their new season. When information about future episodes becomes available, it will be posted here.