I bought 2 small dwellings and 1 large building. They are flat packed and you have to make them yourself.
The instructions that come with them are very clear and have colour photos to explain how to put them together. All the parts are numbered to avoid confusion.
They also have interiors with removal roofs for skirmish gaming. With a firebox, door and wooden slats in the windows. The above building even has a small hole in the wall. I used wood glue to fix them together and am very pleased with the results.
The thatched roofs use teddy bear hair which you then apply a 50:50 mix of PVA and water which you apply with an old toothbrush (Mrs Freewargamesrules would not be happy if I used her current one). This really gives the roof a thatched look.
The final purchase for the proposed SAGA game was a medieval Ox Cart from Sarissa. My mate Si and I both wanted several buildings so we pooled our resources and had discount on the purchases.