I'm sure they'll eventually see it, anyway, but you will probably get a quicker response if you ask this in the Visas & Citizenship section of the forum. Up here we tend to talk about finding housing, and issues with landlords and stuff.
As for paperwork, I don't know which documents, specifically, but I do know you'll need to be able to show that you owned the house 6 months before the date of your application, and then you'll need to show that the proceeds from the sale of the house + savings you've had for at least 6 months meet the savings threshold.