I specialize in White Plains (born, raised & work in White Plains, NY).
Much of White Plains was built in the 1920s-1930s. Most of these properties are colonial homes and are located in many different neighborhoods that range from the low to the high end price ranges. I'll pass on addressing your "ethnic communities" part of your question (Realtors have to be careful how they discuss ethnic, racial, religious, school related topics). For now I would simply state that White Plains is a very diverse community and all neighborhoods are mixed. Feel free to visit my profile to learn how you can contact me directly should you wish to speak to me any further regarding your current home buying/selling needs.