You might have some luck searching for pictures of "old factories" and stuff like that, as buildings tend to transpire more than 1 era - there's not really such a thing as a "ww2 building".
Most WW2 airfields in Britain, especially South East England, where only really semi-permanent structures, a few wooden huts in a field with the odd dug out to hide in whilst the Luftwaffe did fly bys. Your best bet to get imagery of them is probably to watch some war films, rather than seek out photographs.
For British houses look for "Victorian house" or something like that, I dont think traditional French architecture has changed much so rural French buildings would probably suffice for imagery there. I'm not sure about German architectural styles though.
Most WW2 airfields in Britain, especially South East England, where only really semi-permanent structures, a few wooden huts in a field with the odd dug out to hide in whilst the Luftwaffe did fly bys. Your best bet to get imagery of them is probably to watch some war films, rather than seek out photographs.
For British houses look for "Victorian house" or something like that, I dont think traditional French architecture has changed much so rural French buildings would probably suffice for imagery there. I'm not sure about German architectural styles though.