The French Cadastral website is less detailed in its free data services than the Spanish one. Using again the City Hall as the reference point (a public building) as in Madrid, there is much less information available, unless you pay.
Cadastral image of the Paris Hotel de Ville and its surounding areas
Cadastral data for the Hotel de Ville (a single lot covering the whole block)
But the Geoportail brings a wonderful image of the lot structure and the buildings, without limitations due to administrative local limits
metrhispanic 