An IELTS map, isn't it? Anyway, my suggestion is as follows: A reception building has been put up in the middle of the island; additionally, a pier for docking boats and a restaurant have been built, to the south and to the north of the reception, correspondingly.

I would create 2 sentences. A reception building has been added to the middle of the island. There is a restaurant to the north and a pier, to the south, for docking boats.