Thank you for the information, Chancer. I'm sure the information will be very interesting, if I could gain access to it! As far as I can tell I need to create 'mon espace', and to be able to do that I need some reference numbers from my French tax return. However, having no French income and not living in France, I do not submit returns in France. We have a holiday cottage (for the next two weeks anyway, as we are about to complete on its sale), and I do have a fiscal reference on the taxe d'habitation, but I need another 7 digit reference which I don't believe I have. Am I stuck or am I guilty of not looking hard enough? I would be interested to know how the price we achieved for our cottage measures up to other sales, but more useful will be prices in the area we plan to move to next year.