Up here in this area, the realtors I work with want to know everything. Canadian real-estate laws are much more comprehensive. Resent changes to disclosure laws have made these guys nervous, they can be sued into oblivion if the new homeowner gets stuck with flawed construction. You pretty much can't get a good dollar for your home without an inspection here. Alberta inspectors are usually pretty well trained, though there are a few idiots in the bunch. Maybe your realtors need to get hit with a couple twenty five thousand dollar non-disclosure fines. Then they might appreciate you more. As for liability you screw up here, you pay or lose your licence.