Architecture is pretty good field and has great scope. Qualified architects and planners coming from top notch colleges are placed in various real estate developing companies, the government jobs are filled by various examinations conducted each year at the national level. With so many govt projects coming like Smart cities where professionals will be needed from such fields. So you should definitely go for this field.
The top colleges that offer UG level courses in this field in north side are UPES school of planning and architecture, SPA Delhi, Sushant school of planning and architecture Gurgaon & Ansal University. Among these SPA Delhi and UPES are best choices. Admission criteria differs from college to college. Some conduct their own entrance exams, some accepts admissions on the basis of board merit too while for some you need JEE, NATA or AIEEE score. You can get detailed info on website of these institutes.