The Agency

Hamonic+Masson & Associés is Gaëlle Hamonic, Jean-Christophe Masson and, since 2014, Marie-Agnès de Bailliencourt. The practice was founded in 1997, was nominated for the Mies van der Rohe prize in 2001, and in 2002 was awarded the Nouveaux Albums de la Jeune Architecture (NAJA) by the French Minister of Culture and Communication.

The firm became known for their Maison Métal in Paris’ Parc de la Villette. It was an event that placed Hamonic+Masson at the crossroads of art and architecture, a flexible place that creates a place of adventure. We have since staged events such as co-curating the French Pavilion at the 2008 Venice Biennial, and opened a series of exhibitions at venues such as the Cité de l’architecture & du patrimoine. Furthermore, Hamonic+Masson & Associés regularly participate in numerous international conferences and lectures, and our work has been the subject of many publications and has featured in numerous exhibitions in France and internationally.

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In 2012, the office received the “prix spécial AMO Saint-Gobain” for the construction of 62 social housing units on rue Villiot in Paris’ 12th arrondissement.

The practice intervenes in all sectors including housing, public facilities, retail, offices, infrastructure and urban design in France and internationally. It is presently participating in the debate on height that has become such a hot topic throughout France. In 2015 the practice completed and delivered Paris’ first housing project measuring 50m since the 1970s, in the city’s Masséna district. Projects in the framework of the Grand Paris are also currently being undertaken, notably the proposition for the Avenue Foch, which became one of the major projects backed by the Paris City Hall during Anne Hidalgo’s 2014 campaign for the Mayor of Paris.

The agency also won “large scale” consultations such as Inventons la Métropole du Grand Paris II in 2019, with the mixed program of the Arsenal Eco-district in Rueil Malmaison.

In 2018, the agency was awarded winner in the framework of the international Imagine Angers consultation, with its Metamorphosis project: mixed program of offices, third places, co-living, block room, fitness, spa, public passage, restaurant.

Today, Hamonic + Masson & Associés is invited to various international consultations and conferences to bring its expertise to living well in height and new ways of living in changing cities.


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Hamonic+Masson & Associés


+33 1 53 62 99 43

Office Paris
93 rue Montmartre
75002 Paris


Office Marseille
22 rue Dieudé
13006 Marseille



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The team