You can do B.Arch from Bangalore or from other state it is depend on your choice, there are many Colleges in top Bangalore which provides B.Arch course

List of colleges offering B.Arch. in Bangalore, Karnataka
Acharya's N.R.V. School of Architecture
Acharya Institutes, Acharya Dr. Sarvepalli Radhakrishnan Road, Acharya Post Office
Bangalore, Karnataka

B.M.S. College of Engineering
P.O. Box No. 1908 Bull Temple Road,
Bangalore, Karnataka

Dayananda Sagar College of Engineering
Shivage Malleshwara Hills, Kumaraswamy Layout
Bangalore, Karnataka

Impact School of Architecture
Impact Campus, Sahakara Nagar South
Bangalore, Karnataka

M.S. Ramaiah Institute of Technology
MSR Nagar, MSRIT Post
Bangalore, Karnataka

S.J.B. School of Architecture and Planning
BGS Health & Education City, Kengeri
Bangalore, Karnataka

Sharada School of Architecture
14, Sharada hills, Hesaraghatta Road, Chikkabettahalli, Vidyaranyapura Post
Bangalore, Karnataka

The Oxford College of Engineering
10th Milestone Bommanahalli Hosur Road
Bangalore, Karnataka

University Visvesvaraya College of Engineering - UVCE
City Campus K.R. Circle
Bangalore, Karnataka

Top B.Arch Colleges in India
SCHOOL OF PLANNING & ARCHITECTURE
4-Block B, Indraprastha Estate, New Delhi-110002

CHANDIGARH COLLEGE OF ARCHITECTURE
Sector 12, Chandigarh -160012

SIR J.J.COLLEGE OF ARCHITECTURE
78/3 D.N. Road, Mumbai -400001

BENGAL ENGINEERING COLLEGE
P.O.Botanical Garden Shibpur, Howrah

JADAVPUR UNIVERSITY
Jadavpur, Kolkata -700032

TVB SCHOOL OF HABITAT STUDIES
Behind Sector D, Pocket-2, Vasant Kunj,New Delhi-110070

IIT,KHARAGPUR
Kharagpur -721302

IIT, ROORKEE
Roorkee-247667

CENTRE FOR ENVIRONMENTAL PLANNING & TECHNOLOGY
Kasturbhai Laalbhai Campus, Navarangpura,Ahmedabad -380009

RAI UNIVERSITY RAIPUR
A-41, MCIE, Mathura Road, New Delhi -110044