Record checked on 26 October 2026.
Leibar Seigneurin Architectes
Architecture firm in Bayonne
Overview
Leibar Seigneurin Architectes is headquartered in Bayonne, with a second office in Bordeaux; it was founded by Xavier Leibar and Jean-Marie Seigneurin and is now run by four partner architects. Its first building, the Ikastola school in Biarritz (1993), won the Prix de la première œuvre. The firm has since built housing, schools and workplaces across south-west France and worked with Steven Holl on the Cité de l'Océan et du Surf in Biarritz.
- Founded
- —
- Team
- ≈ 15
- Projects
- 7
- Awards
- 8
The firm cites more than 30 years of practice and its first building dates from 1993; the current company (SARL) was registered in 2000.
Other offices: Bordeaux
Partners and founders
Xavier LeibarCo-founder
Jean-Marie SeigneurinCo-founder
Julien BaronnetPartner architect / Co-manager
Clémence LaurPartner architect / Co-manager
Clément LatieulePartner architect / Co-manager
Jules MousseignePartner architect / Co-manager
Fields of work
Housing · Schools and education buildings · Workplaces and production buildings · Cultural buildings · Public spaces
Built work
Simone Veil School Complex
Vertou · Primary schoolThermes Salins school complex and nursery
Biarritz · Primary school and nursery (renovation and new build)Concerto, Bassins à flot (52 homes incl. senior housing)
Bordeaux · HousingCité de l'Océan et du Surf (with Steven Holl Architects)
Biarritz · Museum and exhibition centreMaison de la Communauté des Communes
Montfort-en-Chalosse · Local government officesIkastola (Basque-medium nursery and primary school)
Biarritz · Primary schoolPrizes and awards
- 2024Regional Timber Construction Prize, Aturri covered playground
- 2024Trophées de la construction SMABTP (finalist), Lantokia ALKI
- 2022Regional Timber Construction Prize, Thermes Salins school complex
- 2013Pyramides d'argent, Regional Grand Prize, Concerto, Bordeaux
- 2011Équerre d'argent (nomination), Cité de l'Océan et du Surf, Biarritz
- 2008Prix Agora, Îlot Saint-Jean, Bordeaux
- 2007Équerre d'argent (nomination), Maison de la Communauté des Communes, Montfort-en-Chalosse
- 1994Prix de la première œuvre, Ikastola, Biarritz
Frequently asked questions
Where is Leibar Seigneurin Architectes based?
The firm's address is 2 chemin de la Marouette, 64100 Bayonne.
How can I contact Leibar Seigneurin Architectes?
You can reach the firm by phone on +33 5 59 47 32 60, by email at agence@leibarseigneurin.com and through its website leibarseigneurin.com.
What are the main projects of Leibar Seigneurin Architectes?
Its built work includes Lantokia, ALKI headquarters and workshops (Larressore, 2024), Simone Veil School Complex (Vertou, 2024) and Thermes Salins school complex and nursery (Biarritz, 2019).