Without knowing the specifics of the advertising or why you would want to do this, or why the houseowner might obect, it is impossible to say. But I assume you have taken the obvious step of asking the houseowner already and been refused? In which case offer them a fee or discount as an inducement. If that cuts no ice, "don't" would seem wise. If the owner decides to pursue the issue you will end up enmired in litigation, with costs and stress out of all proportion to any benefit. Nobody can tell you with certainty how this will pan out. Bear in mind that 50% of lawyers are wrong in court, every day.