The minimum to apply to a CS major and what it actually takes are two different things at UW Seattle. In general, you need a 4.0 and it really helps to get research experience as well.
Other campuses have started putting limits on in-state students transferring when they don’t get CS. For example, Western Washington has a one-year moratorium on transfer students enrolling in CS classes so that the kids who started there from freshman year aren’t shut out of courses.