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KOAN Architecture is an architecture practice based in Helsinki,

Finland, established by Marko Simsiö and Johannes Koskela.


KOAN focuses on sustainable and wooden architecture projects on different scales. The practice has designed a large variety of wooden buildings and areas for dwelling, leisure, and public use in Finland and abroad. We design anything from large-scale areas to public buildings and private homes.


Our design ideology is strongly human-oriented. We want to solve things in a 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.



Architectural and principal design

(Arkkitehti- ja pääsuunnittelu)

Urban planning


Concept design

Restoration and refurbishment design

Interior design

Research and development

Architectural competitions




Johannes Koskela

architect SAFA /

founding partner

+358 400 768 960

Marko Simsiö

architect SAFA /

founding partner

+358 45 694 0102

Marko & Johannes Arkkitehtitoimisto KOAN

Juha Koskela, architect (

Karoliina Mäenpää, architect (

Heikki Savirinne, bachelor of architecture

Erika Siikaoja, architect (

Grecia Soria, business development specialist

Tanya Yliaho, architect (, interior designer


Honkarakenne Oyj

Supercell Oy

S-Ryhmä / Osuuskauppa Keskimaa

Kempeleen kunta

Vihdin seurakunta

Kastelli-Talot Oy

Lapti Group Oy


Hoivarakentajat Oy

Riisula-Rakennus Oy

Numerous private clients in Finland and abroad

If you are interested to hear more about us or to collaborate, please don't hesitate to contact us!

Follow us on social media

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  • LinkedIn
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