Hi there; I live in Alberta and built my own home - a timberframe. I too had to have an engineer sign off on my plans. Oddly enough it was hard to find one that would - or better stated "could" do it. First guy I called had the word Timber in the company name, but when I told him I,m building a timberframe he said "is that like a log house?". Well, I went with a different guy but I had to supply him with the deflection formulas for Douglas Fir. Anything outside of stick built and your in for a fight with building inspectors, appraisors, Insurance companies and in my case banks.