About Us

“We aim for a balanced approach, integrating architectural heritage, sustainable design, and urban vitality into all our projects.”


Founded in Helsinki in 1985, Arkkitehdit Davidsson Tarkela (aDT) is an office specializing in the renovation and extension of listed buildings as well as demanding new construction projects. Our expertise also encompasses design project management, urban design, and the integration of circular economy principles and sustainable development throughout project processes.

aDT offers versatile design services to both public and private clients. The office employs architects and interior designers whose close collaboration with clients and networked design approach ensures a comprehensive perspective on projects.


In projects involving protected and historically significant buildings, aDT’s extensive understanding of the site’s societal, local, and future significance has garnered praise and awards for the office.


In new construction, we undertake diverse public projects including museums, hotels, convention centers, offices, schools, and sports facilities.


We believe site conditions and project needs define each project’s identity. aDT aims for expressive, distinctive, and lasting architecture, blending the essence of the place with functional and material considerations. We advocate for a cohesive architectural theme from the large scale to the detail level.

ADT Oy · Architects Davidsson Tarkela

Kasarmikatu 36 · 00130 Helsinki
+358 9 434 2060 · info@arkdt.fi
OVT 003710251743
Y-tunnus: 1025174-3

About Solwers

We are Solwers – aDT became a member of the Solwers Plc in 2018.


Solwers is a united group of expert companies in the built environment consultancy sector. Solwers companies are specialized in providing architecture, technical consulting, environmental monitoring, project management, circular economy, and digital solutions. Our clients are public organisations and private companies. Solwers companies share the passion to create unique and sustainable living environments for building better societies piece by piece.


Being part of Solwers enables us to offer an even wider design service to our customers together with our trusted collaborators in the Solwers group (see Solwers services here).