Bunk beds are great to save bedroom space with 2 or more person. If you want to build it, bookmark this collection of free DIY bunk bed plans.
Loft bed someday for my growing up son.
A simple yet nice triple bunk bed
Disclaimer: if you hate making beds, you will really hate making these ;) Shelves and bedding are from IKEA. Large wooden initials are from Hobby Lobby.
FREE Bunkbed Plans - How to design and build custom bunk beds