Resp. Sir,
Cost of construction will be calculated on the basis of floor planning i.e. how many room, how many floor, empty space etc. So I would request you to explore some readymade floor plans at GharExpert at link:
http://www.gharexpert.com/archi_plans/Architectural-Plans-For-Commercial-Residential-Projects.aspx
You can purchase any of the following and ask us for customization.
On details of how this process works, here is the link:
http://www.gharexpert.com/archi_plans/sample-architectural-structure-electrical-plumbing-drawings.aspx
Regards