If the dreamer dreams that he is ascending to a room or a palace without a ladder or stairs, he will attain a high position without any one helping him, because Allah says:
The basic principle with regard to means of ascending is that they are indicative of high status and good deeds. If it is made of wood,that is indicative of hypocrisy because Allah describes the hypocrites as being.
The same applies if it is made of baked bricks, because they have been fired. But it is a good sign if it is made of un-burnt bricks and clay.