Earlier quoted context omitted.
I would love to be able to suggest something, but I think I just made up the design from my own head. I had a rough plan, and I made the rest up as I went along. If you send me an email (see my profile -> website) I can share with you the construction photos.
Sounds like you do not have the building inspection hell of many places. Local governments often insist that every aspect of the build is documented before you start (which is unachievable) and any deviations from the plan require stopping work and re-documenting at vast expense in professional fees and charges from the state.
Original: https://vimeo.com/28848933
Revisited (apologies for the C4 link which requires hoops to watch): https://www.channel4.com/programmes/grand-designs-revisited/...
Ben Law's website: https://ben-law.co.uk/