Dear Aspirant, some of the top institutes in Tamil Nadu offering B.Tech in Civil Engineering are:

• IIT Madras
• NIT Trichy
• GCT Coimbatore - Government College of Technology
• College of Engineering,Guindy

You can find more here :

https://engineering.careers360.com/colleges/list-of-engineering-colleges-in-india? state=Tamil%20Nadu&ownership=Public/Government&branch=Civil%20Engineering You can use this tool to find colleges according to aspects:

https://engineering.careers360.com/colleges/ranking

https://engineering.careers360.com/colleges/list-of-engineering-colleges-in-tamil-nadu