Choose a flat area
Gather stone, cobblestone, wood, glass, and torches
Mark the castle outline with blocks
Build thick outer walls
Add corner towers
Make a main gate with an entrance arch
Add a drawbridge or bridge if needed
Raise the walls to the desired height
Put battlements on top of the walls
Build a keep or main tower in the center
Add windows and arrow slits
Create interior rooms and floors
Build stairs or ladders between levels
Add a courtyard inside the walls
Place torches or lanterns for lighting
Add a roof to towers and buildings
Decorate with banners, flags, and pathways
Surround the castle with a moat or fence if desired