Choose a plot that doesn't have an irregular shape. Square or rectangle shape plot is considered good.
A land that was a burial ground, or a crematorium is not suitable for living. Ideally it should be flat level ground. A land on a hill is also not a suitable. If it is on a slope, then the land sloping down toward the north or east is ok but if it is sloping to the west it is not good.
Avoid buying a plot having cracks.
The length of the land should not be more than twice the breadth. A plot that has more length in the east west direction is good for purchasing purpose.
A plot-facing road from all sides is considered auspicious.
The land should not be too porous i.e. should not absorb water very fast.
The slope of the roof should be such that water should flow towards North or East.
The house should not be constructed on the land which is a dead end.
Vastu does not advice the buying of such a plot that has more of open space in southern portion as compared to the northern side, as it is likely to cause some sort of destruction.
A plot situated between two larger plots is not good as it brings poverty.
If the plot is next to a bridge it is not auspicious - particularly if the bridge is on the north or east side. You can compromise if it is on the south or west side.
A valley or a large pit around the land or a depression in the land is inauspicious.
Water source located on the southwest side of a building will bring misery. If the plot has a well, swimming pool, lake, river or a stream flowing on the north east it is auspicious.
If there is an electrical power supply station or large electric pole on the north east side of the plot it is not good for the vibrations.
The plot should not be within twice the distance of the height of the house to any public place like temple, hospital, factory etc. If the distance is more than that then it is ok. The house should be at least 80 ft or more away from any temple. The gate should not face a temple and the shadow of a temple should not fall on the house.
Avoid plots near a meat shop, workshop, laundry, shoe shop, etc.
The fence or the boundary wall should be higher on the west and south and lower on the north and east sides.