You can consider below names as these colleges are decent to pursue B.Tech in Civil Engineering other tthan NITs & IITs -

Amrita School of Engineering, Coimbatore

PSG College of Technology, Coimbatore

Thiagarajar College of Engineering, Madurai

College of Engineering, Guindy, Anna University

VIT University, Vellore

International Institute of Information Technology, Bangalore (IIIT-B)

Manipal Institute of Technology, Manipal etc.

Good Luck!!!