Spot on, everything depends on covered area but the trend of full double story house it costs around 60-80 the variation is quality of materials....
Top notch bricks, proper gauge RCC, wiring, proper cement sand ratio, putting crush(bajri) instead of brick rori.. it will eventually end up to 80lacs..
5 lacs electrical fittings
Flooring costs from rs 200/sqfeet to 2000/sqfeet
Batch room can cost from 2 to 50lacs/bathroom
Branded kitchens range from 15 to 40 lacs.
Main gate costs 200 to 300k
Main door can cost from 200 to 500k
Everyother door costs 50 to 100k
Windows cost 500 to a million depending on size and type including glass etc.
Labour rate eventually costs 15 to 20 lacs....
Minimum budget you need is 1.20 crore but it will eventually come to 1.5
And extreme cases it can be unlimited as you can find hot tubs, jacuzzi which cost way above 16 lacs, and commode around 6.5 lac lolzzzzzz.
First and most important step is find a good architect.. if architect is good then everything else will be fine too.
There are Architects who charge 30k to 100k and there are who eventually end up costing you around a million.