In this bathroom by @sembrodesigns, the corner next to the shower could just be left as wasted space. But the cabinet bench ...

Maybe a bench storage seat would work well for your family? Or how about recessing shelves in the wall? A local fitter should be able to create a bespoke design to suit your needs. Use the Which?

If space is sparse, then shop around for streamlined bathroom furniture that can slot in the narrow space next to the toilet, below the sink or behind the door. This clever little unit is perfect for ...