1. You look at their interior design portfolio
2. Does it appeal to you?
3. Can you see yourself living in the spaces that the designer has created?
4. Talk to the designer and go with your gut feeling.
5. Meet with the designer and see if you click. Does the designer listen or does all the talking? You will be working with this person for a while and you want to feel comfortable telling him or her want you really want for your interior design space.