LXSY Architektur

LXSY Architektur is an architecture practice based in Berlin, Germany, founded in 2015 by architects Kim Le Roux and Margit Sichrovsky. The firm operates as LXSY Architektur PartGmbB, a German partnership company with limited professional liability, registered at the Amtsgericht Charlottenburg under PR 1378 B. Its office is located at Lützowstr. 102-104 in Berlin's Tiergarten district. In April 2024, architect Wiebke Ahues joined the founding partners, expanding the leadership team to three partners. The practice positions itself as an ambassador of the "Bauwende" — the transformation of the construction industry toward climate justice. Its core focus is circular planning and construction (zirkuläres Planen und Bauen), an approach that conserves resources, avoids waste, and rethinks established industry standards. LXSY describes its work as going beyond merely producing architecture: it aims to generate positive social, cultural, and ecological impact, and to explore how society will live and work together in the future. LXSY's project portfolio spans housing, adaptive reuse, and public space. Notable examples include the inner-city densification of a 1960s corner building in Berlin-Kreuzberg, where two additional storeys, a courtyard extension, and an energy-efficient facade renovation are planned to add eight new apartments to 16 existing ones; the conversion of a historic courtyard ensemble in Brandenburg into a seminar and guest house with 14 guest beds; and a resource-conserving renovation concept for a condominium in Berlin-Stralau. The firm also participated in the ideas competition for Berlin's Tempelhofer Feld with a vision titled "Ein Meer für Alle" (A Sea for Everyone), proposing ecological resilience, social integration, and sustainable urban development without building on the open field. As a small, partner-led studio, LXSY combines architectural design with advocacy for a circular construction economy. Its communication emphasizes courage, appreciation, and experimentation, and it frames circular building as generating new aesthetic categories that respect planetary boundaries while addressing fundamental human needs such as housing, work, identity, continuity, and cultural reference. The practice is active primarily in Germany and collaborates with clients and partners on projects ranging from early concepts to full implementation.

LXSY Architektur was founded in Berlin in 2015 by architects Kim Le Roux and Margit Sichrovsky. From its inception, the practice oriented itself toward the field of circular planning and construction, an approach that seeks to transform the construction industry into a climate-just sector that conserves resources and avoids waste. The firm established its office at Lützowstr. 102-104 in Berlin and operates as LXSY Architektur PartGmbB, a partnership company with limited professional liability, registered at the Amtsgericht Charlottenburg (PR 1378 B). In April 2024, architect Wiebke Ahues joined the founding partners, expanding the leadership to three partners. All three are architects and members of the BDA (Bund Deutscher Architektinnen und Architekten). The practice describes itself as an ambassador of the "Bauwende" — the necessary transformation of the building sector — and positions circular construction as a key to sustainable change. LXSY's work spans housing, adaptive reuse, and urban transformation. Projects include the inner-city densification of a 1960s corner building in Berlin-Kreuzberg, where the firm plans to add two storeys, a courtyard extension, and an energy-efficient facade renovation to create eight new apartments alongside 16 existing ones. In Brandenburg, LXSY is converting a historic courtyard ensemble into a seminar and guest house with 14 guest beds across two construction phases. The firm also developed a resource-conserving renovation concept for a condominium in Berlin-Stralau. In the ideas competition for Berlin's Tempelhofer Feld, LXSY proposed "Ein Meer für Alle," a vision that avoids building on the open field and instead transforms it through ecological resilience, social integration, and sustainable urban development. The practice emphasizes a culture of courage, appreciation, and experimentation, and argues that the transformation of the construction industry requires new processes, strategies, and a new building culture. Through circular building, LXSY believes new aesthetic categories emerge that respect ecological and planetary boundaries while addressing human needs such as housing, work, identity, continuity, and cultural reference.

• 2024

  Wiebke Ahues joins as partner in April 2024.

• 2015

  LXSY Architektur founded in Berlin by Kim Le Roux and Margit Sichrovsky.

Pioneer of circular and climate-just construction; ambassador of the Bauwende, combining architectural design with ecological and social impact.

• Inner-city densification, Kreuzberg

  Conversion of a 1960s corner building with two additional storeys, courtyard extension, and energy-efficient facade renovation, adding eight new apartments to 16 existing ones.

• Seminar and guest house, Brandenburg

  Conversion of a historic courtyard ensemble into a seminar and guest house with 14 guest beds, several seminar rooms, and a holiday apartment.

• Resource-conserving renovation, Berlin-Stralau

  Renovation concept for a condominium combining modern design and comfort with resource conservation.

• Tempelhofer Feld ideas competition

  Vision 'Ein Meer für Alle' for ecological resilience, social integration, and sustainable urban development without building on the open field.

1. 1LXSY ARCHITEKTUR | LXSY Architekturlxsy.de
2. 2LXSY | About | LXSY Architekturlxsy.de
3. 3LXSY | Kontakt | LXSY Architekturlxsy.de
4. 4LXSY ARCHITEKTUR | TEMPELHOFER FELD | LXSY Architekturlxsy.de
5. 5Wikidatawikidata.org