It's a perfectly nice house. There's nothing odd or wrong with it from here and as they walk closer, he can see that his last name (that name feels so weird, fake, like an answer he adlibbed on a test for want of something better) on the mailbox.

Oland. O Land. Aren't last names supposed to be where you're from? Does that mean he's from nowhere? Or someplace starting in O. What places start in O. He doesn't know. Instead, he frowns and looks at Clary before starting to move towards the door. He invites her with one hand to join him, if she wants. More than anything, it looks like he's investigating.