Question: how to reduce house construction cost in india?
Answer: Cement. Go for local/regional branded cement. ... 
Bricks and Blocks: Buy locally available bricks. ... 
Plastering: Go for Neeru (lime) Finish for internal plastering.
Doors and Windows: Avoid Wooden door frames. ... 
Flooring: ... 
Grill and Railings: ... 
Electrical Material: ... 
Light Fitting: