| Mr. Denny,

Respectfully, I am not Rob, but I will guess at the answer, while you wait.

| on the condition that my city would grant me permission to extend my garage, what ABSOLUTE minimum size build shed floor length, floor width, and overhead clearance allowance for rolling over a hull (should it be needed) would you advise potential builders in regards to the dimensions of your 40EX ?

I suggest, looking at Steinar's build, 7' roof and single car width is fine.

The only "nice to have", as discussed, is length, I think.
And that's only for ~2 infusions and final assembly.

A point that I have not seen made is that, likely, you can make all the parts, which will, I expect, be significantly smaller that the lw hull. Then, haul them to another location and do final assembly, perhaps, nearer to the water.