This is perfect for people who don't have to store piles of files--but if you do need a cabinet, you can slide one underneath, customizing how much storage space you actually need.
Another great example of a custom desk ledge is from my dear friends Monika and Loren: They created their shared home office area in the mezzanine of their Oakland loft by adding a ledge underneath the existing one, creating a split-level desk. They divided the work stations by stowing the computer towers, a scanner, and even a small storage locker in between their respective areas.
If you haven't seen the rest of Monika and Loren's house tour, go check it out here.
(Top Image: Hus and Hem)