From what I've heard the next patch will allow you to teleport to the house of your friends. I haven't verified this claim assuming my friends are telling me the truth.

Having said that however...

I would like to suggest that "when" you make someone tenant to your house... You and them should be able to teleport to one another no matter where you are in the game (unless you are in a duty). There should however be an option that you can cross off if you don't want anyone to be able to teleport to you for those that love to.... roleplay...