I am a community college student who has recently been accepted to Cal Poly as an Environmental Management and Protection major. However, I have been researching and have become interested in Environmental Engineering. How difficult would it be to switch majors/ is it even possible?
http://eadvise.calpoly.edu/changing-majors-into-enve-from-outside-ceng/
I really do not think you can switch majors as transfer student but you can always contact admissions. Remember if switching majors is possible, this will prolong your degree by several years.
Maybe @eyemgh can chime in since he is the expert on Engineering majors…
I spoke with the director of the Mustang Success Center regarding a change in major for a new transfer student. He said that all students, including transfers, have the right to change majors. The student must complete one quarter at CP before starting the process. A contract is written with specific courses that must be completed within a few terms, and if the student completes the coursework according to the terms of the contract, the student would be allowed into the new major. I don’t have any idea of what they consider when they determine whether or not the student would be allowed to enter into the agreement, but he did say that, contrary to what many people believe, they do not necessarily have to have completed the coursework that was required for new transfers into a specific major before they are allowed to change. He also said that it is much more difficult to change to a highly impacted major, which makes sense. It would be interesting to hear from students who have gone through the process, or from those who were denied a change in major. I would call the advising center and ask to speak with someone who can answer any specific questions you have. They were extremely friendly and helpful.
I’m not sure how a transfer would switch. I would call admissions. I would suspect that similar to first time freshmen admits switching, part of the equation would be whether or not you had the stats to be admitted into your desired new major in the first place. This prevents “back dooring” into a major you might not have otherwise gotten into.
Thank you all for your help, I will call 
What did u find out ?