Vision: If you are wallpapering one or more rooms: you would like to change something in your life, but the desire is still residing in your unconscious.
Depth Psychology: A dream about wallpaper is a challenge to express more feelings, intentions, and thoughts, and to throw away the mask you’ve been hiding behind. See Mask, Painting.... Dreamers Dictionary
To dream that you or someone else is hanging up wallpaper, suggests that you are putting up a barrier between yourself and others. It also suggest that you are covering something up - a secret of sorts. Alternatively, it may mean something that needs beautifying.
To dream that you are peeling or stripping off wallpaper, symbolizes that you are beginning to let your guard down or allow yourself to connect more readily with others. It also indicates that you are revealing aspects of yourself that have been kept well hidden.
The color and pattern of the wallpaper in your dream will offer clues as what kind of barrier, secret, or feeling is being represented by the wallpaper.... My Dream Interpretation