Hello Vijay,

The cost of house construction depends on specification used in construction. It also depends on the type of flooring, type of wood used, finishing of external walls and fixing accessories in toilet and kitchen.
For calculation of cost click on the link

‘Cost Estimator’

in which you will find the cost of each item stepwise according to the specification.
It is also suggested that there is another article for precautions before making detail contract with contractor at our website. We hope it will be very helpful for you.