Those two storey houses must be pretty expensive. I recently read an article showing how very few of these small streets of pavillons and row houses there were in Paris proper.
Yeah, single-family homes within the intra-muros are quite an oddity.
Reminds me of a guy I knew as a student, whose dad happened to be from Quebec. I think his dad was a philosopher or something. I never really knew what his job was, but they had a fairly roomy house with a little yard around the Tolbiac area of the 13th arrondissement, which I'd found astonishing when pretty much everyone in the central city lives in apartments. Their home was a complete mess of books. Hundreds and hundreds of books scattered everywhere in the house. There was some sort of intellectual elite atmosphere in there.
Never thought of asking the worth of their house, though. But I assume it was somewhat pricey indeed.