Équerre d'argent 2023 Record checked on 26 October 2026.
h2o architectes
Architecture firm in Paris 11th · founded in 2005
Overview
h2o architectes is a Paris practice founded in 2005 by Charlotte Hubert and Jean-Jacques Hubert, joined in 2008 by Antoine Santiard as partner. Much of its work deals with existing and historic buildings, from the partial renovation of the Musée d'Art Moderne de Paris to the conversion of the former Ministry of the Armed Forces into 254 social homes (with François Brugel Architectes Associés), which won the 2023 Équerre d'argent. Charlotte Hubert has been an architecte en chef des monuments historiques since 2016, and the three partners also run a sister firm, Eugène Architectes du Patrimoine.
- Founded
- 2005
- Team
- ≈ 18
- Projects
- 8
- Awards
- 5
Partners and founders
Charlotte HubertCo-founder, co-manager / Architect (architecte en chef des monuments historiques)
Jean-Jacques HubertCo-founder, co-manager / Architect
Antoine SantiardPartner, co-manager / Architect
Fields of work
Heritage and listed buildings · Museums · Housing · Conversion of existing buildings · Urban design
Built work
Offices in a former garage, Villa du Clos de Malevart
Paris · Garage-to-office conversionÎlot Saint-Germain, 254 social homes (with François Brugel Architectes Associés)
Paris · Conversion of a ministry into housingMusée national de la Marine (renovation, with Snøhetta)
Paris · Museum renovationMaison Saint-Charles intergenerational house
Paris · Housing and conference centreMusée d'Art Moderne de Paris (partial renovation)
Paris · Museum renovation12 social housing units in a raised office building
Montreuil · Office-to-housing conversionBoarding house, Lycée Henri-IV
Paris · Student boarding facilityPrizes and awards
- 2024best architects 25 award (Clos de Malevart offices)
- 2023Équerre d'argent (Îlot Saint-Germain, with François Brugel Architectes Associés)
- 2022Grand Prix SIMI, Housing — mixed-use category (Maison Saint-Charles)
- 2018International prize for office-to-housing conversion (12 homes, Montreuil)
- 2008Albums of Young Architects and Landscape Architects (NAJAP) — Charlotte Hubert and Jean-Jacques Hubert
Frequently asked questions
Where is h2o architectes based?
The firm's address is 10 cité d'Angoulême, 75011 Paris.
When was h2o architectes founded?
It was founded in 2005.
How can I contact h2o architectes?
You can reach the firm by phone on +33 9 64 00 52 81, by email at contact@h2oarchitectes.com and through its website h2oarchitectes.com.
What are the main projects of h2o architectes?
Its built work includes Claude Debussy's birthplace (renovation) (Saint-Germain-en-Laye, 2024), Offices in a former garage, Villa du Clos de Malevart (Paris, 2023) and Îlot Saint-Germain, 254 social homes (with François Brugel Architectes Associés) (Paris, 2023).