Does the centre taken from the boundary wall also decide where on the plot to construct?
Where to construct is taught later; for example, on a North-facing plot the building is placed in the South and West part. The pishach bhoomi is always left open on all sides. People abroad leave space all around and keep large backyards and live prosperously, while many people here leave no space at all for energy to come in.
Related questions
Can a mirror be fitted on a wardrobe in the S, SSW, SW, WSW or West?
No. Wardrobe mirrors also belong on the North or East wall. Some say the North-West is also allowed because the mirror represents the water element and the Moon.
If a house faces South or West, must its slope also be toward the South-West, as in many houses?
There are two types of slope, which will be covered again. If water flows underground toward the South, it is not a big defect: electricity and water move underground everywhere without regard to direction, so an underground flow against the ideal direction does not create a dosh. People living where underground water flows to the South and West are also found to be happy.
If only part of a plot is to be built, where are the devtas marked?
If construction covers only part of the plot with space left all around, the 45 devtas are allocated on the whole plot and their places are selected on it.
If the first floor is fully built and the second floor only half built, which area is taken when zoning the second floor?
Only the area that is actually built on that floor.
In my East-facing house the temple had to be on the North wall, so the gods face South; is that wrong?
Do not make the gods face South; it brings heaviness, for example interviews go well but give no result. Place them on the West wall instead so that they face East.
Must the house be at 0 degrees for a sarvatobhadra dwar?
By definition it is at 0 degrees with doors in all four directions, but it can be made otherwise too: build the doors on whichever pads fall on Pushpdant, Grihakshat, Bhallat and E4.