Thank you,
So the benefit of 6m rule is ability to dig more, right?
So for the sake of argument, If I dig 3m or say 3.10 away from his house (by the way, the layout is his house<1.35 m is his alley way> then my fence >My garden), I don't need PWA and I don't need to get him involved in terms of how I do the retaining wall. At this moment, the previous owner already dug some part of this level and retained the soil using gravel boards , can I do same on the new area as this is a short term aim, most likely will do the garden along with other side in future and serve PWA, etc,.