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If i have a house and i want to delite the char that owns the house to make a new one, will i lose the house?
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Houses are account bound. If you have a house on a shard with multiple characters on that shard under the same account, when you delete the char that is the actual house owner, all remaining characters still have full ownership rights. The old deleted character's name will remain on the house, though as "owner".
If you only have 1 character on the shard where the house is, when you delete that character, and create a new one on that shard, the new character will have full ownership rights to the house. Again, the old character's name will still be listed as owner.
-Skylark