You could select everything in the bathroom using the shift key after selecting the first object to select more objects. Once you have everything selected, right click and select Copy.
Then open a new home and right click and select paste.
It can be a little tricky doing this if you have something on top of something else.

You can also drag a box around the bathroom to select all.

You could also delete everything but the bathroom and make sure you save it as a new file so you don't lose everything.