I think that the floor plan has options, and the only bed selected have been circled, so the main bedroom is a converted garage with no window and the two en-suites at the front on the first floor are to 2 small doubles with windows.
However there is an error somewhere as the flooring plan has no bedrooms on the second floor and yet there's a photo of a bed under a vaulted shiny wooden ceiling.
It's a house which has been split unevenly into 2 flats which share a front door, I think. I didn't get to the end of the blurb but presume that the ground floor flat gets all the garden?
It is a lot of money, as they are apparently trying to recoup the expensive decoration which is very niche in style and taste.
Thanks OP: definitely the most unlikely listing I've seen!