VASTU SHASTRA FOR BASEMENTS
FIGURE - 1
  1. It is preffered to have the Basement in the North-East corner of the house since the level in this corner should be the lowest in the plot.
  2. Second preference should be give to North - West corner and South - East corner.
  3. It is not preffered to give basement in the South - West corner of the house.
  4. If basement is given below the complete building then slope should be provided in excavation, foundations and flooring from South - West to North - East corner of the building ie. N-E corner should always be the lowest.