The original first floor bathroom was located in the space we were going to use to expand the kitchen.
We knew we were going to need to move the bathroom. The new space for the bathroom would be right next door and would replace a very, very small bedroom and an entrance to the old stair case. That door in the picture below was the old entrance to the staircase. It will become a bathroom closet.
The dimensions for this space worked perfectly for the new bathroom. The staircase to the 2nd floor would be moved the location currently taken by this pair of closets. We hated taking them down, but it was a necessary sacrifice.
Those closet doors are going to be re-purposed. One will be a new doorway for the basement and the top cabinet of one will be used as access doors under the new stair case.
The wall was removed opposite of the old doorway to the basement to provide a new entrance to the basement stairs and an additional entrance the to kitchen. That 2nd entrance to the kitchen was unplanned, but once we had that opening we loved the way it created a quicker and more logical way to get to the bathroom, new stairs to 2nd floor, and playroom.
We removed most of the old stairs, but preserved the bottom few.
They will remain as a part of the bathroom closet.
The open area above the stairs was framed out for a new floor and a ceiling for the new bathroom closet.
We are going to tile the bathroom floor, so we took the opportunity to remove some of the flooring for the new bathroom to use at the top of the basement stairs (the new entrance to the kitchen).
There was originally a step down to this area at the top of the basement stairs. We raised that floor height and used the bathroom flooring to blend in with the rest of the house.
That bathroom really came to life once we had drywall!
We will probably hold off on doing much with the downstairs bathroom now because we are going to tackle the upstairs bathroom first. This room might be one of the last rooms to be completed.