Kiran, regret for not responding earlier. But if you want to study B.Arch through distance mode, you can try IGNOU. IGNOU offers B.Arch programme for a minimum duration of 5 years and the admission is based on your 10+2. You can check the complete information regarding the programme at: http://www.ignou.ac.in/ignou/aboutignou/school/soet/programmes/detail/575/1 but if you want online programmes for B.Arch, then you may have to try foreign Universities like University of Arizona, East Carolina University, Academy of Art University.