Choosing the Bathrooms
The bathroom design will have been considered at the design stage to know where to locate the waste pipes. However specific sanitaryware, floor and wall finishes will have to be picked out, along with an overarching design style. Moving waste pipes would probably involve extending the waste pipe, and best avoided.
As with the kitchen visit at least three bathroom showrooms, and get three quotes for your finished design. As with kitchens you will get different advice and information from each supplier as well as a range of products to choose from. That said, as with everything there are trends in bathroom design so you may find very similar products.