Only do this if your house is NOT improperly placed, or in a guard zone.
Every character on your account owns the house. Just the name of the character you used to place it is on the house sign. With the I wish to resize my house you can now jump on any character use that new option, and have another character's name on the house sign.
I did this a couple days ago so I know it works.
any way you go about it doesnt matter delete the house own, or I wish to resize to put it on another character, then delete the character you don't want.