Eye In The Sky
Update: Drones are now circling the skies looking for cabins and other structures that are over the “no planning permission required or notice of works required” size. Click here for more details
If you haven’t declared your swimming pool to the local authorities you could find yourself in the deep end as far as the French taxation system is concerned. Aerial shots are now being looked at using Google and other technology to search for offenders and hundreds of unregistered pools have been found and hefty fines issued. Don’t forget to register yours and make sure that your taxe foncière calculations are amended correctly.
https://www.service-public.fr/particuliers/vosdroits/N319?lang=en