For basement office: The Pottery Barn-inspired desk below has painted file cabinet bases, which hold the top of a disassembled IKEA Effektiv desk. The result is a charming corner work space. The full tutorial is available at IKEAhackers
DIY Filing cabinet makeover - epoxy to attach cheap frames from walmart, painted entire thing using homemade chalk paint in swiss coffee color, then added new hardware and finished it with minwax paste wax to guard against scuffs and scratches.
DIY Modern Farmhouse Murphy Bed - How To Build the Bed and Bookcase