The foundation and the basics of life. Lower chakra issues. Feeling safe, storing emotions and things that are kept concealed. Hidden issues. Things that you would like to forget. Areas in buildings and houses always have to do with the different aspects of the self. The basement is the lower chakras or the lower vibrational energies where you may store emotions and things that you are not using. Mental stuff that you box up or store, and still want quick access to if you need it. Lower chakras could also relate to sexual energies and whether you are closed or open in that area of your life.
See Home, Buildings, Foundation, Cement, Grounded, Storage, Chakras, Hide, Self, Mental, Mind, Emotions, Hoarding.