We're coming to realise that we need a second bathroom so have been trying to figure out where we could squish it in. It'd realistically need to be an en suite because we don't have anywhere it could go downstairs, and our loft room has a very low ceiling height so couldn't realistically accommodate a shower.
The red rectangle on the floor plan is where I think it would be most practical (obviously not to scale, thinking 1m x 1.5m). It wouldn't take much room from either bedroom, and we don't mind it being the absolute minimum size since we're all really small (I'm 5ft1, DH is 5ft6) and we'd try to get it built as a wet room. I'd probably look at installing a pocket sliding door to maximise space. It's along an external wall so ventilation/a window should be feasible, and I imagine the waste pipe would go under floor, although could potentially wrap around exterior of the building.
Box room is the baby's bedroom and will probably become a media room for the kids as they get older, so wouldn't be a viable site.
What do you think, is that a sensible location (especially in relation to the existing bathroom)? Is there anything I'm missing, any considerations I've missed? I want to have a good idea going into any conversations with contractors to avoid any misunderstanding.