At first you should plan for main entrance, pooja room, kitchen room, toilet room and etc. You should follow the following Vastu tips for house.
(1). Your main entrance should be at middle point of East direction to East North East direction.
(2). Description of Room and their directions
Room's ----- Directions
Pooj Room ----- North East.
Kitchen Room ----- South East.
Bed Room ----- South , North North East, North North West.
Store Room ----- North West.
Study Room ----- South West.
Drawing Room ----- East and East South East.
Family Living Room ----- North and West South West.
Balcony ----- North and East.
Toilet/Bathroom ----- South South West and East South East.