Gîtes — self-catering countryside rentals — and chambres d'hôtes, the French equivalent of a bed and breakfast, are arguably France's signature dog-friendly accommodation type, in the same way cottage rentals are for the UK. Gîtes de France, the large national network that certifies and lists these properties, flags pet acceptance directly: more than 3,400 of its listings welcome animals, searchable through a dedicated "Animal Bienvenu" filter on its own booking site.
Whether a fee applies is set by the individual property, not by Gîtes de France as a network — some charge extra for a pet, others don't, so the booking page or a direct message to the owner is the way to confirm before you commit. A self-catering gîte, being typically a standalone property rather than shared with other guests, tends to be the lower-stress overnight option for a dog that struggles with hotel corridors or unfamiliar animals nearby.
Chambres d'hôtes work slightly differently, since they're a room in someone's home with breakfast included rather than a self-contained rental — pet policy there is worth confirming with extra care, given the host is present throughout the stay rather than just at check-in.