I am working on developing regulations for hillside development. Our code currently states that development on slopes > 30% shall be permitted only with a variance. Unfortunately, that is all that it says. Developers think this is an outdated regulation and insist that anything can be engineered. I have the authority to require additional information to be submitted. This is what I came up with so far: engineered stamped soils report and slope analysis, side section illustration of the proposed cut.
Is there a certain % slope that is unbuildable?