I've been looking for plans for a dollhouse that will fit barbies for quite a while and came across this blog.
DIY Dollhouse made from a Bookshelf.
#DIY Dream Doll House! What little girl wouldnt just swoon over this?! #crafts Check out Dieting Digest
Ana White | Build a Three Story American Girl or 18" Dollhouse | Free and Easy DIY Project and Furniture Plans
CasaVoltolina: Dollhouse for Maileg Bunnies, Rabbits and mouse. Girls room. Kids room
Dolls house More
A DIY dollhouse project by Simply The Nest - a UK renovation blog