I recently spotted that Justin Smith had posted a video montage of his creative design process for the house (ages ago!). It shows some of the high-level design concepts and several of the alternative configurations which were considered before settling on the final layout, form and finishes.
1:39 duration
YouTube Video – Creative Design Process by Marsh Flatts Farm Self Build Diary is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.