I have always liked the HO buildings made by railway modelling companies, especially the continental framed houses, they really have character. I have never used them with my 25mm figs as they looked too small.
On the Kingdom of Wittenburg blog I have just seen all the author does is make bigger doors on card and glues them over the exisiting doors. It will not work in every case but for SYW it looks fine and means a good looking town of several buildings can be squeezed into the space 2 or 3 buildings of 'correct' scale. It looks like a sizeable settlement not a hamlet.
And you can often pick these kits second hand, already made, at decent prices.