The LEGO® Group did an amazing job with the design of Hogwarts Castle, but Harry Potter fans wanted more. Ryan Kroboth delivered with his epic extension to the castle.
Ryan did a fantastic job with this design, filling it full of detail and adding in all the buildings not originally found in the main set. He seamlessly integrated the original set into his expanded design, so you can’t tell where one begins and the other ends.
Jason Pyett was asked to produce instructions for this wonderful design, as well he did some minor tweaking of the design.
The Hogwarts Epic Extension measures 130.6cm (51.4″) by 93.7cm (36.9″) by 62.8cm (27.4″). The Extension, not including the original set, consists of 19307 pieces.
You can find instructions for this design here https://rebrickable.com/mocs/MOC-30884/Playwell%20Bricks/hogwarts-castle-71043-epic-extension/