[mouseboy33]

It always made sense to build the house within an existing structure. Its waaaay cheaper and greater control over external forces (wind rain etc) and easier to make structural adjustments if they choose to do a new series the following year.
 
If the Daily Mail is correct the house could be within the large structure with the green roof. Total speculation on my part, but maybe the garden/backyard pool will be in the space between the large building and the smaller building. Guessing the smaller building would be production offices. I cant see them doing the outdoor audience area. It would make sense for Southern California or Australia, but I never really thought it made sense for the UK with the rainy cold weather. I know show they like to show the exterior of the  house.....but that was a thing back in the day (even the 1st series of the US did that), but its so unnecessary today. Now US and Canadian versions never show the exteriors of the studio buildings. So maybe the big building will include a smaller indoor audience studio and the entrance to the house. Like the US or Canada. But then again the UK audience likes to scream and yell and that can be heard inside the house. "Get them out"!. Or maybe like the North American versions they will ask the audience to refrain from yelling stuff like that. So I guess we shall see on the audience location. Or maybe there wont be a live audience......It will be interesting to see what they do to give the show some longevity rather than just a reboot of a tired format.