Move or build?

Tonight we had a meeting to discuss the last issues before we start with the construction of the new second floor in september. Originally, the 2nd floor was only one room with 2 small windows and a low ceiling, but we are going to extend it with 2 large rooms. For more detailed plans, look here. Tonight we have inspected the flat roof, and the view is really awesome! We even see the woods and wind mills in Germany!