Which room should be constructed in which direction, if this consideration is not kept in mind while planning a house, the whole building may go against the principles of  and it will create lot of troubles causing harms and loss to the owner/inmates. People are generally ignoring this fact and are constructing house according to their choice. Architects now a days prepare house-plans without considering the principles and rules given by ancient Vaastu-Shastra. They keep in mind the latest designs, imitating the designs based on foreign culture but if the basic principles of Vastu satisfying the five basic materials (Panch Mahabhutas) are ignored, the house becomes the root cause or troubles, losses and sorrows in the life of the inmates.

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For example, it has become a fashion these days to construct kitchen near the main gate. Reason for doing so is given that for most of the time a housewife has to remain in the kitchen and it becomes easy to her to keep a watch on the main door, and that she can conveniently attend to any body calling at the door. How strange and any visitor or guest should be received and entertained by the head of the family and the guest room/drawing room should be near the main door. Visitors come from all the classes of society and have to be treated in different ways depending upon their status.

Indian Vaastu Shastra divides the house into 16 parts wherein rooms or various purpose should be constructed, keeping the directions in mind as follows: -

Sanasya pak Shayanastra bhujeshcha dhanya dhandar

Daivat grihani ch poorvatah syuh;

Tanmadhytoath mathanayaja pureesha vidyabhyasakhya.

Rodanaratoushadha sarvadham.

Direction

Room to be constructed.

East

Bathroom

South-east          

Kitchen

South

Bed room

South-west  

Room for weapons

West  

Dining room

North-west

Grain store

North

Treasury

 North-east

Room of worship

Between East and South-east

Room for churning curd

Between South and South-east

Room for storage for Ghee etc.

Between South and South-west  

Latrine (W.C.)

Between South-West and West  

Study room

Between West and North-west

Punishment room for expressing sympathy or sorrow.

Between North and North-West

Bed Room for young couple

Between North and North-east  

Medicine Room

Between East and North-East  

Common/Drawing Room

Besides these, there are other opinions also :

In South -West corner

Clothes Room (Wardrobe)

North-west corner      

Cattle shed

North-east    

Water bodies-tank, well etc.

North-west

Toilet.

Snanagni Swapivastra Bhojan pashu dravyamarok stishim,

Poorvado jalmishiturdishi param Vayorpan mootrakam.

As far as possible, various rooms should be oriented in the house as per directions given in Vaastu-Shastra.  Some of the rooms, such as room for churning curd, store for ghee, room for expressing sorrow, etc. may not be necessary in modern times. These may be utilised for other purposes, In case of shortage of space position of the rooms may be adjusted as per convenience and necessity. But there are some rooms which must be kept in the position suggested in Vaastu-shastra. If these are built in some other prohibited space, it will prove inauspicious and harmful for the inmates.

In modern times it is not feasible to build big houses having large number of rooms as mentioned in Vaastu Shastra. Houses are built on small plots which can not accommodate many rooms. Therefore it is advised to construct the house in accordance with the principles of Vaastu, in abridged form having rooms as per necessity and convenience.

Proper place for bath-room has been suggested in the east direction. The mild rays of the morning sun are beneficial for health. These rays can be received by the body while bathing, there fore bath room in the east side is good. There is a tradition in our culture to offer prayer (arghya) to the rising sun, just after taking bath.

Slope of the floor of the bath room should be towards north or east. Water should drain out on the north or east side.