My build is based mostly on the book description (Swimming pool size bath, diving board, 100 taps all around, white marble, chandelier...). And also a fair heap of "artistic interpretation"
I had a hiccup with the mermaid stained glass, I had edited a picture together and planned on printing it as a decal and have it against trans blue bricks to get the right effect but my printer has died and I figured I have spent enough money on this any how. So it is just on regular paper and inserted between the window and (now invisible) blue bricks. A pity.
The toilet, old fashioned and castle looking? I hope so, I wanted to retain the glitzy rich feeling of the bathroom without compromising on the "this is still an old, old castle" feel.
The Prefects can have every luxury, spare soap, oils and fluffy white towels are always supplied.
A large chandelier provides the light along with the large stained glass windows.
A rather excessively large bath is the main focus of the room, surrounded by 100 (about 60 in reality) taps that all have different coloured water and bubbles. This guy has obviously chosen the blue ones down the end.
One end of the bath has a small diving board (as book describes). I hope no one uses it as they would be sure to snap their necks.
Some of the Prefects hide in this luxurious bathroom to perform some of their more embarrassing spells. Like Ron here, trying to cast a spell for an ice-cream bath.
If anyone is interested there are many more pictures, close up etc here on my Flickr.