Vastu is not only about directions but rather it is also about dimensions and measurements.The ratio between length and breadth of the building should normally be 1:1 or 1:1.5 or maximum 1:2. If the ratio is more than 1:2, that plot is not considered to be good according to the Vastu.
The building dimension should preferably be longer in North-South, shorter in East-West.
Ground level should be higher in West, Southwest and South as compared to East, North and Northeast. It is better to keep North-East the lowest.
First Floor level should be higher in South, South-West, South-East and Western portion and lower in North, North-East and East. The water should flow towards East or North and not in other directions. Central zone should be even
It is better to keep roofing sloping towards East and North.