To see a bricked-up doorway in your dream implies that you are shutting yourself down from the world.

If you are inside the bricked-up doorway, then it represents your sheltered life.

If you are outside the bricked-up doorway, then it means that there is a deep secret that you are trying to prevent from coming out.

Alternatively, a bricked-up doorway is similar to a locked door and signifies missed or denied opportunities.