I'm hoping contracts are in 2.0. The best indication is from the last live letter.
Once players have constructed a basic house, they can open a special housing widget to browse and purchase housing materials, such as roofing. You could also commission crafters to build roofing, which could then be equipped, in a sense, onto your house to change its external appearance. You can even hang tapestries on your walls. So that’s basically how you can change your house.
I just wish I knew if that meant you have to go "commission" it yourself, or whether there's a system in place for it.