You say it here:
...This is my basic design for a small building that I've used to create a pair of houses under construction. By printing it flat like this, rather than as a fully 3D assembled house I have avoided a lot of clean up and it's given me more flexibility for future builds, for example a building that's got a side still to be built...
Manual construction, aided by 3D printed elements, for symmetry and accuracy exactly where you want it!
A great step for future modelling!
Needless to say that your blog is a treasure trove! Cheers!