Speak to Murd Doc.
I used t' have quite the home back in Ironforge. That is, I did until I was booted out to make way for the gnomes.
They couldn't stop a bunch of troggs with all them gizmos and machines! An' I have to pay for their weakness?
No, sir. No longer.
Go to Gnomeregan and talk to Commando Murd Doc. Sure, he's a gnome, but his crew, S.A.F.E. I think they call 'em, are going to take Gnomeregan back.
Go! I want my house back!