Does engineering design differ for a knockdown rebuild versus a fresh block?

Yes, genuinely — a knockdown rebuild site often has existing site history (old footings, disturbed soil, prior fill) that a fresh block doesn’t, all of which your engineer needs to genuinely account for rather than treating it as untouched ground.

A fresh soil report is still required either way, but your engineer interprets it alongside the site’s known history on a rebuild.

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