The octagonal building on the right is the original tollhouse. The wooden centre section and second octagonal building make up the extension, built 25-30 years ago. According to the deeds the road originally ran right up to the wall, in fact the house projected into it. A parcel of land was bought and attached to the property to allow garden all around the building. The current A33 runs behind the fence just visible on the far right of the picture.
The original part of the building is Grade II listed apparently.