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KOAN Architecture is an architecture practice based in Helsinki,

Finland, established by Marko Simsiö and Johannes Koskela.


KOAN is focusing on sustainable and wooden architecture projects in different scales. The practice has designed a large variety of wooden buildings and areas for dwelling, leisure, and public use.


Our design ideology is deeply human-oriented. We want to solve things in contemporary way, retaining respect for tradition and context. For the best results, we believe it is important to work in active collaboration with the client and other participants in each project.



Johannes Koskela

architect (, founding partner

+358 400 768 960

Marko Simsiö

architect (, founding partner

+358 45 694 0102

Team members / Collaborators

Juha Koskela, architect (

Karoliina Mäenpää, architect (

Heikki Savirinne, bachelor of architecture

Erika Siikaoja, architect (

Grecia Soria, business development specialist

Tanya Yliaho, architect (, interior designer

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