IGNOU itself is a Open University and it has no other Universities.Having said that, it has study centres and Affiliated Colleges and Universities across India.  Under its School of Engineering and Technology http://www.ignou.ac.in/ignou/aboutignou/school/soet/programmes/detail/575/1 , IGNOU offers 5 year Distance Education course of B.Arch. The maximum duration that you can complete this course is within 7 years. You should have completed your 12th with a minimum aggregate of 50% with Mathematics as one of the subjects at 12th. Or a 10th with 3 years Diploma with 50% aggregate is also acceptable. Those Candidates who want to take admission to B.Arch Proggramme should have a valid NATA score in the exam conducted by the Council of Architecture.