Hello Kritika,
Hope you are doing absolutely well.
So as per your query, first of all to do the course of BArch, England is considered to be the best country to do the course. Also these are some of the colleges which are best for the course of BArch,
1. University College London
2. ETH Zurich, Switzerland
3. Harvard University Cambridge
4. University of Toronto
5. Teesside University
Hope it helps you!!