Sounds fishy... I think our underwriters would consider that insufficient coverage and would require the borrower to increase their coverage. I've never heard of expanded replacement cost, either, but it sounds a lot like GAP insurance! I think regulators might have a problem with this because the insurance company is going pay out (in the event of catastrophe) based on what it would cost to replace that home which, in their eyes, may or may not be enough to pay off that loan. I'm also always taking the conservative road, though, so others might have different opinions!