This wardrobe looks like a build in but it is in fact an Ikea hack and not even that tricky to build yourself.
The slanted ceilings called for a custom made storage solution and this wardrobe has an Ikea Ivar shelving system as its base I just added the reclaimed door and a wooden frame. See the video tutorials here 

http://www.hestershandmadehome.com/hestershandmadehome/reclaimeddoorwardrobe