Which design pattern should I use? Please advise if my understanding is correct about the design pattern to be used

I have an application that I want to develop. The application is single access point for various organizations with a parent organization. The likely features would be as follows. 1. The CSS themes could change as per organization. 2. Logo will change 3. Menus will change 4. Widgets will change based on users and organizations. 5. The basic functionality and database will remain the same.

I think I should use the factory pattern at C# level.

PS: it is a MVC application.