Guimard was of course also an architect who created a number of buildings in Paris. In a post of September 2007 on my previous blog, I made a complete tour of his buildings that we can still find in the 16th arrondissement, where most of the remaining ones are concentrated ... and where he lived and worked. You have a map in that post.
One of his most famous creations is the “Castel Béranger”, built in 1898, just before he created the metro design (1900). These are the illustrations of “Castel Béranger” I presented in the above referred post.
He had his working place here. When I passed in front of the building the other day, I saw an open window. His working studio was under renovation and I managed to take a photo or two before the painters reacted... I like to imagine that this may be where he designed the metro entrances. I took some additional photos, where we can e.g. see the open window and the little door leading to his work place.