No, you can't sell your house at any figure you like. You can put your house on the market for any figure you like. You can only sell it at a price someone is willing to pay, or less, irrespective of what is said in any guide or web site. As it's a free(ish) market, a house has no absolute financial "worth", only what it will fetch. In a depression, your house is "worth" less. You can look at the rebuild costs (and do, for insurance) but the above is still then true of the land on which it stands, so the above still stands.