Sir J.J College of Architecture

Hi Abik,
Admission is done through counselling conducted by Directorate of Technical Education, Maharashtra based on marks obtained in 10+2/ Diploma and score obtained in National Aptitude Test in Architecture (NATA).
Selection parameter and weightages:
10+2/ Diploma marks - 50%
NATA score - 50%
https://www.shiksha.com/architecture-planning/course/b-arch-sir-j-j-college-of-architecture-mumbai-71170

Yes, subjected to qualification in NATA/IIT JEE part 2.

Follow the official website link below for all the details:
http://www.sirjjarchitecture.org/barch-admissions

Sir JJ College of Architecture accepts NATA score above 140. NATA score is quite low and now coming to your JEE paper 2 score it's also called low as the prime government colleges close within 235 marks.

SPA-Delhi only accepts JEE score and that too above 250.

It is a little difficult, but yeah you may try.
Visit this link to check B.Arch colleges based upon your rank:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=6919840
Then visit this link for various colleges which provides you brochure:
https://www.shiksha.com/architecture-planning/colleges/b-arch-colleges-india

No, it is a little difficult under government quota.
Visit this link to check B.Arch colleges based upon your rank:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=6919840
Then visit this link for various colleges which provides you brochure:
https://www.shiksha.com/architecture-planning/colleges/b-arch-colleges-india

You have to be qualified in NATA or IIT JEE part 2 for admission into Architecture course.

JJ College of Architecture accepts NATA score, and it's admission close within 150 marks, so there is no chance for admission in that college.

Yes, you can get a seat in the same campus. The chances are very high. This score is more than enough for the campus.