Hello,

Yes, you can study B.Arch after passing Diploma in Civil Engineering. In India there are three entrance examination conducted for admission to B.Arch namely NATA, JEE MAIN (Paper 2) and JEE ADVANCED  AAT. While JEE Main score is accepted by NITs, GFTIs, SPAs and other institutions AAT score is accepted by IITs. Candidates qualifying in JEE MAIN will be eligible to apply for JEE ADVANCED AAT. NATA score is accepted by various institutions across India. The eligibility criteria to apply for JEE Main (Paper 2) is that a candidate must have passed 10+2 or it's equivalent with Mathematics, Physics and Chemistry. Candidates who have passed a Diploma recognized by AICTE or a State board of technical education of a minimum of three years duration are also eligible. The eligibility criteria to appear for NATA is that a candidate must have passed 10+2 or its equivalent with Mathematics, Physics and Chemistry with minimum 50% marks from a recognised board. Candidates who have passed Diploma (10+3) in any discipline from a recognised board are also eligible to apply.

So based on your interest and the institute in which you wish to seek admission you can apply for these entrance examination. To check the details click on the link below

https://www.careers360.com/courses/b-arch-bachelor-of-architecture