When something is restored it is made whole again and in spiritual terms such an image can suggest healing or a return to a former state. Carrying out a restoration in dreams suggests that we are still connected with the past and are trying to recreate it in some way. There is an interesting anomaly from a mundane perspective since in carrying out a restoration we are referring to the past but working for a future, towards the tangibility of something permanent. You might also like to consult the entries for Old and Repair.