Answer13 - The " Vaastu Shastra " always recommends that a house should be built in the shape of a square or a rectangle. Of course, out-houses built on the corners may be round. So it is not good, as per the "Vaastu Shastra" to build houses in other shapes i.e. L, U, O shapes. The ‘L’ shaped buildings are constructed with only two sides; thus missing the remaining ones.This is not in accordance with the basic principles of Vaastu Shastra.N.W.
West
S.W. South S.E.
East
North N.E.
If constructing such a building is compulsory, The construction may be started along the South side beginning from S.W. and proceeding towards S.E leaving as less space as possible on the plot in the South. Then another building may be started along the West side beginning from S.W. and proceeding towards the North side wall of the plot. The vacant space between the house on the South and the compound wall must be less than the space between the North wall and the house. In the same way the vacant space between the house and the east wall must be double the vacant space on the West side. In these houses,the level of flooring and the roof of the Southern house must be higher than the level of those on the West. If stairs are to be built on these houses, Verandas must be constructed first on the East and North and then stairs should be built. If stairs are to be built on only one of these two houses, it must be built only on the house on the Southern side. But one should not forget to built Verandas on the East and the North. It should always be noted to see that the level of the house on the South is higher than that of the flooring and the roof of the house on the West. This is quite correct according to the principle of the Vaastu Shastra. As regards this door ways, elevation & depressions and windows, rules referred to above in the previous pages may be consulted.
Thus construction of the ‘L’ shaped building on a plot lowering the level on the South and West with both the buildings touching each other in S.W. corner, are notadvisable as it causes financial crisis, no issue or, lack of male issue, enmity,accidents or sudden death. 
We have observed in large number of cases that violating the rules given above for a ‘L’ shaped buildings very bad; because in such house the land-lordbecomes henpecked,. There are financial losses,delay of the plan, addiction to vices, distress sale of property, and accidents etc. It is hereby sincerely advised that if at all ‘L’, ‘U’ and ‘O’ or any other irregular shaped construction is a must; alearned Vaastu Expert must invariably be consulted.