This is a princess castle doll house I originally designed for my daughter. It has ornate gates, two towers, a dungeon, and a hidden treasure chamber in the tower. The side wall of the downstairs room opens up, and so does the roof. She loves it!
Dimensions (wxdxh): 520mm x 270mm x 354mm
or: 20.4" x 10.6" x 13.9"
It was designed to be cut from sheet material with dimensions 600mm x 300mm x 3mm. I produced it from MDF. If you want to use different-size sheet material, you will have to adapt the interlocking teeth and the holes for the hinges.