Hi Lauer, I have seen many houses prior to this that has done this. Thats why is still boggles me why not.? After all, its not going to be a wet space anymore and I am just shortening the length of the toilet. The sewer piping is still intact will the planned smaller toilet will still have the original piping and whatever pipings there is the same way. I am just changing the location of my door from front to side thats all and having the curb and "lintel" or RC after the change looks super strange.