The extension is finished

I visited the dentist again today. I had a few concerns, but the dentist was reassuring. She said I was healing very nicely and no need to be worried.
Sitting in the car afterwards, I noticed the building work, on the house opposite, had come to an end. They seem to have gone slightly overboard and beyond other semi-detached houses in the street. I am not sure they made a wise investment (or am I jealous?).