Should the player conquer a castle without being sworn to a liege, he takes the castle for himself, and founds a new kingdom. They can also wait for the food supply of the castle/town to run out, and then take control, or if a lord holding a castle/town defects without being indicted, it will go to the new faction defected to. There are other ways for a faction to capture a castle in Warband other than just besieging it. With an enemy castle.you have the option to besiege it and claim it for your own. In order to take control of a castle, you must besiege it. If the castle near your village is already owned by a lord (almost 100% of the time it is), then you are out of luck, you can't get that one unless an enemy faction captures it and you retake it.Ĭastles are found all over Calradia, and each one has a nearby village. Don't count on the king giving you one otherwise unless your reputation with him and the other lords are all super high and you manage to convince them to support your cause. Unless you've just recently been rewarded a fief, the King will almost always grant you the town/castle you've just captured. When you capture a town or castle, you can make the request to your king that you want to keep it.
Those places usually have a rather weak garrison so you should be able to take it without too much trouble. Keep an eye out along the borders where towns and castles frequently change hands.
The best way of getting a castle or town is to capture one yourself.