Vastu Shastra indicates us North empty back yard is most suitable. The second option is West empty back yard. South empty back yard is always avoid. You should choose North empty back yard and main entrance should be at middle point of North to North North West. A map is given below about this;
Internal parts ( Rooms and other place) should be at proper place. Bedroom / Pooja room and directions are given below :
Pooja Room ----- North East.
Kitchen Room ----- South East.
Bed Room ----- South, North North East and North North West.
Store Room ----- North West.
Toilet Room ----- South South West and East South East.