SLETH is an office of architecture and urban planning. Our main focus is architecture related to urban development.
Our services range from concepts and ideas to the execution of urban planning and construction projects.
Since the beginning of 2006 the team has stood out on several occasions, winning prizes and distinctions.
Right now we are completing projects – ranging from design to urban planning.
The office continuously participates in architectural competitions and research projects. We collaborate with colleagues and academic institutions as an important part of our professional development.
We are operating projects that range geographically and by type, working with public and private organizations as well as privately held companies and independent constructors.
SLETH was founded in 2006 and is being led by architects Søren Leth and Rasmus Therkildsen. 
We are based in Denmark with offices in Aarhus and Copenhagen.



15 10 Topping out ceremony for our new office in Aarhus. See more here.

15 09 Construction has begun on Valsetorvet, the first of a number of new urban interventions based on the Steelscapes Frederiksværk. See more here.

15 08 Topping out ceremony.The extension of the Tønder Townhall in southern Jutland is well on the way, with the main exterior facades nearing completion. See photos here.

15 05 Hamburg/Aarhus. We presented the ongoing development plan for Aarhus K as part of the exhibition Create With Aarhus at the Hafencity University. Read more here.

15 03 1.Prize Hovinbyen. Sleth is chosen as winner in the open architectural competition for the extension of the Oslo metropolitan area. See the project here.

15 01 Tønder Townhall. Mayor Laurids Rudebeck and Rasmus breaks ground for the new townhall in Tønder.

14 11 We will be presenting our work on future scenarios for a CO2 neutral Denmark as part of the DK2050 conference on 5. November 2014. More info click here.

14 10 Tønder Townhall. The Tønder Municipality Board of Directors has approved the result of the EU tender. Construction is scheduled to begin January 2015. To see full project click here.

14 10 'A'A'. SLETH is contributing to the issue nº402 ´Scandinavie´ of the French architectural magazine L’Architecture d’Aujourd’hui. See more click here

14 09 Göteborg Plaza. The new urban plaza in Nordhavn is near completion. See full project click here

14 08 Nordhavn Opening. Aarhusgadekvarteret, the first phase of the new urban district, was inaugurated August 31 with exhibitions, workshops and tours of the new neighborhood.

14 07 Schematic design for the Ildved Church Plaza has been approved. The project is due for completion in the spring of 2015. See full project click here

14 06 The People Meeting - Folkemødet 2014.  SLETH is participating in Denmark’s Political Festival on Bornholm. SLETH is leading the Green State scenario workshop and joining the public debate as part of the DK2050 project.  

14 05 SLETH is returning to the Venice Biennale! The office will contribute to discussions about Denmarks sustainability goals in relation to planning and architecture.

14 05 1.Prize Steelscape Frederiksværk. SLETH is chosen as the final winner in the invited competition for revitalizing the urban spaces and cultural heritage of Frederiksværk. To see full project click here.

14 04 DK 2050. SLETH is selected as one of 4 offices to develop future scenarios for a CO2 neutral Denmark in 2050.



CVR-nr. 32154557

At the moment we have no vacancies. We are constantly interested in meeting talented and dedicated people. 
Feel free to send us a mail with a couple of words and a pdf portfolio at
All applications will be considered, but we will not necessarily be able to respond all.

For inquiries please call us at the office or write to

Rasmus Therkildsen
Architect MAA

Søren Leth 
Architect MAA

Lars Jensen
Team leader Copenhagen Office
Architect MAA


Jægergårdsgade 152, 03E
8000 Aarhus C
Tel +45 32111001

Trangravsvej 6 (1.floor)
1436 København K
Tel +45 32131001