hi,

admission to b.arch courses of five years duration is based on jee main paper 2 score or nata score along with your 12th results score. however this year there is some major chances in NATA exam pattern. drawing portions is removed.  The exam will have only one part- Aptitude Test of mathematics, physics, geometry, verbal and logical reasoning, abstract reasoning etc.  you may follow our article at below link to know in details:

https://engineering.careers360.com/articles/nata-exam-pattern

however since this is for the first time of NATA exam which would be conducted with a new pattern,  it is difficult to predict about colleges only based on NATA score.

however I suggest you to study hard and target for a higher score .

best of luck.