In case you have not seen these:
http://www.davesgames.net/wfrp2/ Dave Graffam produces a huge range of models - all of the buildings can be printed out to any scale - he has printing percentages on first page - for example - they are by default 28/30 mm scale but you can print out to 34% for 10mm.
Most of the buildings are multi-layered PDFs - so you can print them out in a huge range of options - brick/wood/stone all with or without beams etc - with plaster on bottom half or top half - etc.
Variable roof textures too. It is quite possible to make about 12 very different models of one structure! - which makes them incredible value.
I grant you that they are fantasy/medieval in style but at 6mm or 10mm they look fine to me, even for WW2.
I have bulit loads of them for my 28mm Napoleonics but am building them all over again in 10mm for BKC.