Calling all home decorators, builders and people with small bedrooms... can you help me please?!?!?!?

Calling all home decorators, builders and people with small bedrooms... can you help me please?!?!?!?
So I have a small room (about 10ft by 11ft) and about 7 1/2ft in height. My room is always messy and cluttered because it's so small.
I would really love to put loft in my room, but im not sure if it will fit.
Here are some pictures of the idea I am looking to do:
http://freshome.com/2008/09/19/bedroom-ideas-for-kids-tiramolla-loft-bedrooms-from-tumidei/ />
do you think I could do it or will I have to expand my bedroom?