Onze04 is an architecture studio founded in 2006 in Barcelona by Gustavo Silva-Nicoletti.
Gustavo Silva-Nicoletti holds a degree in architecture from the Escuela Tècnica Superior de Arquitectura del Vallès (ETSAV), UPC, Barcelona.
Onze04 primarily develops public development projects (facilities and social housing), which it enters through national and international competitions.
In addition to working in Spain, the firm has developed a significant portion of its projects in France since 2011.
Onze04's work has received numerous awards in Spain and France, including:
.- Finalists and Shortlisted for the FAD Architecture Awards in 2012, 2016, and 2025 (Gustavo was selected to the FAD for Ephemeral Architecture as a student in 1999).
.- Winners of the French ADC Awards in 2016 and 2020
.- Winners of the Trophées de la Construction in 2015, 2020, and 2021, among others.
Internationally, Onze04 has received the Architecture Masterprize four times (twice in 2021 and twice in 2022) and has just received the European Best Architects 2026 award.
