First of all, you ought to secure a couple of corbels. It shouldn’t be so hard as it sounds, as corbels have been widely spread in house constructions for some centuries now. Mainly they were used for roof supports, but depending of the architecture, an individual can find them as floor supports as well.
Consider looking for nice dilapidated homes. I man houses that would be nice if they were not dilapidated. Old style design, mostly. They’ve a lot of corbels. Or you can visit some city honest or estate auction, where they sell everything really very cheap. You will definitely find one.
After you have the set of corbels you may want to do a little refurbishing on them. And by that I mean a proper sanding and painting. And an eventual professional cleaning to be able to remove wood parasites, if any.
Next you will need a glass top. That’ll be the true length of your desk , so select your own value. The width of the glass top should be the actual width of the corbels. Since the corbels will be connected to the wall and so function as the desk’s feet, the glass top will be secure on top of them. Hence the width of the corbel should match the exact width of the glass top.
I suggest going for a thick glass top. Not only it is safer for you but it’s also looking better. The corbels are sturdy thick pieces of work, so having a thin glass top on them will seem very flimsy and out of proportion.
For securing the corbels to the wall I suggest using some corner mounts. You can fix them in four spots each, two at the top and 2 at the base, which will give a tight and most of all a secure fit. If you’re not a fantastic hand with drilling you’d better ask a friend who’s to do it. I actually did. Next put the glass top and fasten it in place with anything. The softly drill four holes in it.
There you have it: it’s as unique as corbels get and I bet you friends do not own one.