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Facade of the Clarion hotel and congress centre by the water.
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KPMG building's circular staircase designed by aDT pictured from below.
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Interior photo of the Finnish National Theatre lobby.

We are a Helsinki-based architectural firm specializing in demanding renovations, challenging new construction and urban development.

Kuopio Museum​

The renovation and extension of the historically listed Kuopio Museum (1907), designed by J.V. Strömberg, was completed in 2020.  To restore the original character and shape of the existing museum building, an expansion from the 1960s was dismantled.  A new extension unites the Kuopio Museum of Cultural History, the Museum of Natural History, and the Library in a functional and programmatic way.

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Facade and entrance of the Kuopio Museum designed by Arkkitehdit Davidsson Tarkela.
Facade of Siren's National Theatre of Finland

The Finnish National Theatre

The second part of the extensive renovation of Finland’s oldest professional theatre in the Finnish language, the Finnish National Theatre, included the renovation and refurbishment of the 1930s extension and the 1950s Small Stage. Originally designed as a temporary storage building, the 1930s extension was converted into modern production facilities. Designed by Kaija and Heikki Siren (1954), the technical and staff facilities of the Small Stage were modernised to meet present-day requirements. The entire facade of the Small Stage was renovated. The project was completed in 2023.

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Lahti City Hall

Lahti City Hall, designed by Eliel Saarinen and completed in 1912, is listed as a valuable cultural environment and a nationally significant built cultural environment. Respecting the building’s historical periods, the interiors from both 1912 and 1985 were restored, including the original furniture and lighting. Building services were completely renewed, and the layout was modified to meet current needs. The façade was restored and the courtyard was covered and transformed into a warm gathering space for city residents. The project was completed in 2023.

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» See all our works

Accado

Arkkitehdit Davidsson Tarkela

Contria

Finnmap Infra

Geounion

Inmeco

Kalliotekniikka

Lukkaroinen Arkkitehdit

Lvi-insinööritoimisto Meskanen

Polyplan

Pontek

Siren Arkkitehdit

Taitotekniikka

Zenner

Demab

Dreem

ELE Engineering

Enerwex

Establish Schening

Falck CM

KAM Redovisning

Licab

North 68 Consulting

Relitor

TCG Nordic

Wisegate Consulting

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Kasarmikatu 36 · FIN-00130 · Helsinki · +358 9 434 2060 · OVT 003710251743 · info@arkdt.fi