Without being an innovator as was Louis Le Vau at the same period, Chamois remained adept at a simple but effective architecture, without superfluous ornamentation.
Around 1630, Chamois built Nicolas Moret's house at 27 rue Saint-Sulpice [fr] (Hôtel de Fougères), in Paris.
In the years 1656-1657, Chamois built the Hôtel de Lauzun, on the île Saint-Louis in Paris, for Charles Gruyn des Bordes, a financier quickly enriched under Cardinal Mazarin.
The construction of this château for one of the most important ministers of the early reign of Louis XIV can be considered a consecration of his career.
For the future chancellor, he also exercised his talents for the hotel Le Tellier in Paris (at 39-45 rue des Francs-Bourgeois), still preserved.