Well the buying the house thing was back in 2008, not now. But I'm guessing the house they have in Canada is more Haydens and Rachel just stays there, and same with Rachel's house in Los Feliz with Hayden just staying there.
I highly doubt she will even answer the question, but Rachel is having an interview next week where you can text questions for them to ask and they mentioned asking if she's back with Hayden:
msnbc.com Video Player
She usually doesn't answer questions about her personal life, though. But I guess we can see what she says!