modern luxury bathroom redesign keep existing black marble tiles with warm gold veining add a custom built in cabinet in warm oak wood on the left side to conceal the boiler full height to the ceiling and extending to the floor continue cabinetry above the concealed toilet cistern on the right side with a combination of closed cabinets and open illuminated shelves in warm oak finish replace the existing sink with a floating vanity cabinet in beige stone grey color with drawers add a slim vertical mirror with integrated warm led lighting minimal elegant design soft ambient lighting realistic materials high end interior design frontal view