The notion of building houses off-site has been gaining ground:
One way to do this is to build with 'cross-laminated timber' - and this blog piece and another from a year ago received some helpful comment from the States:
One of the best resources for clarifying the topic is the 2013 US CLT Handbook — the comprehensive guide Modern CLT construction [which] addresses a number of these common misconceptions about wood and CLT.
There are other solutions - including the first '3D build' house:
Tonight's edition of Radio 4's In Business looked at the latest ideas and projects: