In India, the fee structure for a Diploma in Civil Engineering can vary based on the institution's type, location, and reputation. Here's a general overview of the costs you might expect:

1. Government Institutes: Government or public polytechnic institutes typically offer a Diploma in Civil Engineering at relatively lower fees. The annual tuition fees for such institutes generally range from INR 10,000 to INR 30,000. Additionally, there might be other charges such as registration fees, examination fees, and development fees, which can amount to around INR 5,000 to INR 10,000 per year.

2. Private Institutes: Private polytechnic colleges usually have higher fees compared to government institutions. The annual tuition fees at private institutes can range from INR 30,000 to INR 1,00,000. Extra costs, including laboratory fees, library fees, and various other charges, might add another INR 10,000 to INR 20,000 annually.

3. Additional Expenses: Apart from the tuition fees, students should also budget for additional expenses such as textbooks, materials, and possibly accommodation if they are studying away from home. These costs can vary widely but typically range from INR 10,000 to INR 30,000 annually.