When we talk about Kitchen Renovation in city like Mumbai Pune Bangalore or any other big city of India, the biggest expense in most cases is Cost of Kitchen Platform.
Lets say you want to replace complete Kitchen Platform. There is Trolley inside that also gets replaced in such cases. Then you have to manage Cooking Range, Chimney arrangement. So there are these and many such items inside Kitchen that either gets partly repaired or completely replaced.
Still the main item that adds up cost is Kitchen Platform and trolley that goes inside to hold utensils etc.
In a typical home 8 feet long fits the requirement, however every home has different requirements. 8 feet is just a typical base which is assumed.
Regarding Trolley expense that can be around Rs 3000 per rft. This is metal work, sometime coated with finishing layer.
Other then carpenter would take care of Cabinet. Electrician takes of light/electricity fitting. Sometimes you need loft made out of some stone etc.
Flooring/Tiling is another item that gets added. Ceramic Tiles would cost you around Rs. 100 per square feet. Vitrified would cost you about Rs. 150 square feet.