My house design is here - as a reminder - 300sqm house (excludes loft) - High insulation, high airtight, SAP 100A+  - Close to the center of a sought after commute-to-London town. (wonder how much that plays into the quotes, but nothing I can do there)   Here's the two quotes I received so far, combined into one comparison doc by my QS - contractor 1 is overall cheaper, so the combined doc is using them as the 'focal' point,  but some things stand out where c2 is ch