As the building with the hipped roof seems to be quite imposing size wise, and approximately the same height as the mystery house, and it appears that there is a chimney on the right wall, it may be that this is the side of the hipped roofbuilding, and possibly the front is facing the trees we can see behind it.
Odd layout and difficult to work out how the buildings are arranged in the grounds.
Earlier in the thread it was mentioned that the front entrance to this house may be on the left, and what we see here is the side view. I wasn't sure about that, but it does seem odd to have the side view of the house behind and the greenhouse, visible at the front of such a posh house. So may be this is a side view after all.