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Réinventer la Seine

Place Mazas Housing

Paris, France



The Place Mazas -150 metres of river frontage in central Paris adjacent to the Bassin de l’Arsenal- was one of the most prestigious sites made available by the City of Paris in the Réinventer la Seine consultation launched in 2017. We were classed second in the final round of the invited competition, with a highly commended project for social and market housing, civic space, a homeless support centre, shops and a self-financing theatre for emerging companies. The latter was identified as being of critical importance for the arts in Paris, and was proposed and developed by our team member Augustin Billetdoux.


The theatre’s construction would be subsidised by sales of housing; it would then be run by a management group comprised of Le Grand Reservoir, Augustin Billetdoux and ourselves, its running and production costs offset by restaurant and occasion rental revenues from a vast roof deck overlooking the river Seine.


The entire building is proposed to be made with a wooden structure and envelope, prefabricated components delivered by river and hoisted on-site from the Arsenal lock outside of working hours. Aside from wood’s inherent sustainability benefits, this would also allow for a much lighter building on a site sitting on massive civic infrastructure (essentially the entire eastern city sewer, also an adjacent metro line).


Led  by developers Capelli, our team proposed this original business model and unusually generous programme with complete financial certainty. We hope to redeploy the knowledge and team structure on other similar projects.


The housing was conceived by Frédéric Menon-Bertheux of Capelli as an evolving ensemble where social and market housing have the same format and status. Market housing is laid out so as to permit combination of studio units with two and three bed apartments, allowing recomposition -for example- when children leave home. There are a limited number of prestige apartments with axial river views towards Notre Dame, over the project’s roof terrace. 20% of the units are rental social housing.

See also:

Place Mazas Urban Plan

Place Mazas Theatre

Client: Capelli / Ville de Paris

Project area: 8,824 m2

Budget: 20 million euros

Project area: 


Studio Andrew Todd, architects

Flavia Restaldi

Jola Shehu

Andrew Todd

L+A Landscape Architects

Ron Henderson

Terrell, Structural Engineering

David Bruchon

INEX, HVAC Engineering

BMF, Cost Consultant

Agence Franck Boutté, Sustainability Consultant

Augustin Billetdoux / Le Grand Reservoir, Project Management

Advisers: Pierre-Yves Lenoir / Thomas Jolly / Karim Bel Kacem

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