If your friend is renovating a whole house, he or she should have an architect. If they have a remotely modernist sensibility, I can recommend an excellent one who recently did a major renovation in Brooklyn.
Thanks for the answers, but I'm still hoping for more ideas.
@Douglass I'm not sure about the scope of the work. But thanks.
If they are contemplating any kind of structural changes, have them check out www.ackertarchitecture.com.