You do not find a many individual houses in Paris as the city is rather small and so mostly built with buildings. "La Mouzaia" is an area located near the Parc des Buttes Chaumont in the 19th arrondissement and it holds a few streets with only stone houses like these. There were built at the end of the 19th century for workers. You now have to be anything but a simple worker to own one of them ! It's a very nice walk by the way that you must add when visiting the Park.