Development from feedback..

It is still my intention that the systems in each house would be personalised and decentralised, with composting toilets and grey water systems that ultimately feed back into their individual gardens but they have the opportunity to then support even smaller community systems around decentralised community gardens.

However I've redrawn a site plan showing a more natural layout, understanding the land it's on. I've sketched more of my original idea of clustered, decentralised living with small gardens appearing throughout the settlements that can be shared community garden spaces. All the surrounding houses can contribute to these smaller gardens.
The paths  and circulation through the communities now make more sense, with gradual paths moving up the steep hill and options of 'green stairs' which would be compacted earth with rocks and other natural formations to form permeable steps just like green streets.