I'm trying to understand the economics of a self build better and want to understand how to better predict £/m2 pricing.
Obviously the complexity, design features, material choices will have an immense impact on price but for the sake of this arguments let me simplify it to a cost for a watertight shell (finished render exterior & doors and windows).
What would be more expensive:
A 200m2 single storey house or
A 200m2 1.75 storey dwelling with a ground floor area of 100m2.
To me the answer is obvious the first will be more expensive due to the larger foundations roof etc. However, by how much?
I am looking at a plot that has planning permission for a rectangular 4 bed 1.75 dwelling (200m2 roughly) and I'm straggling to understand how to price it correctly per m2.
Location: outside Edinburgh by-pass, preferred construction method: ICF. I've budgeted about £110 - 130k so far for a water tight shell with me working PM'ing a contractor to reach that stage but maybe i'm day dreaming.