Castle in Minecraft is just a perfect build for your survival world or especially if you play with your friends because it provides a lot of space, shelter and really good defence. First, make a list of materials, Tools, and layouts required to build a castle in your world.
To Build a castle: First, look for open space and clear the area and make sure it is suitable for building a castle according to your layout, Now recreate the layout on space in your world. Then start with building the frames & towers with stone bricks as per the layout.
After building the basic design of the castle then start to create walls using spruce planks on the towers, use spruce trapdoors to create a window and build floors with oak planks and stones for an aesthetic look and also provide a ladder to climb to the top of the castle and provide lantern at different places in castle and you can create a moat around the castle.
Below linked video will show you how to build a castle in Minecraft :
