I just stumbled across this http://www.nacsba.org.uk/selfbuildonashoestring/12-shoestring/39-shoestring2013top16
Some of the designs are interesting. But the listed prices seem optimistic.
I’ve always wondered why more people don’t use steel frame like in the winning design. It really minimises foundation costs.
I was thinking it could work well with 200mm MgO SIPs.
I’ve just had a reasonable quote for the sips. I was wondering if a erected steel portal frame would be cheaper than the insulated slab quotes I’ve had?
The area I’m building in is semi rural so I’m thinking I could probably get a good deal. My groundworkers are local farmers.
http://www.nacsba.org.uk/images/shoestring/18_shoestring13_ed-green.pdf
http://www.pentan.co.uk/project/barnhaus/