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Welcome to HEJ-Arkitekter

Hej, dear visitors!
We are a young international architecture office placed in Copenhagen.

HEJ Arkitekter was founded in February 2018 by Philipp Hesse as an international architecture company based in Copenhagen. In 2020 Mariana Cara d’Anjo joined HEJ as a partner and the office moved to Urban13, in Frederiksberg, where a growing community of creatives collaborate. Today, the office is lead by Mariana and Philipp and supported by different architects as co-workers in the projects according to the work flow.

We want to unlock the potential of the past to create a better future.

We complement each other’s skills with our different educational and cultural background and work experience. These combined allow for openness to search for the best solution, by analysing challenges from different perspectives.

The awareness of our impact in the cultural heritage and social identity, as well as the one connected to the choice of materials, is always part of our work.

We strive to collaborate with different actors across the building sector and relevant disciplines so that the projects is inspiring for everyone involved, ending up with a coherent result.

At the moment, we are actively working with projects indifferent scales in Denmark and Germany.


Picture Mariana Cara D'Anjo


Portugal | 02/02/95
MSc. Sustainable Design Engineering Aalborg Universitet København 2017_19
BA. Architecture Faculdade de Arquitectura UL 2012_16


Projectcollaboration with Lendager Group
Recycle Beirut
Materiale Centralen


Portuguese, English, Spanish, French

Picture Philipp Hesse


14/10/90 | Germany
2014_16 MA. Architecture Fachhochschule Lübeck
2011_14 BA. Architecture Fachhochschule Erfurt


Hauschild+Siegel ApS
Heske Hochgürtel Lohse PartGmbB
Dr. Michael Scheftel Bauforschung, Claudius Gabriel Architekten BDA


German, Danish, English, French

Arkitekt Maa I Medlemnr. 212367
Ingenieur eingetragener ausw. Architekt AIK SH I Nr. 51
Member of Icomos Denmark I DNK 38081


Picture Philipp Hesse

This renovation project was developed in 2016, which I then helped to build in ‘17. The client was a swedish family who had a traditional house in Stockholm’s archipelago. They wanted to renovate the existing structure and optimize the floor area, potentiating the materials of the original house into a more functional and suitable disposition for the growing family.

Picture Philipp Hesse

Me an Tim Riis Tolman have partnered with Lendager TCW in a INTERREG project lead by Gate21 with the aim of re-purposing waste textiles into efficient construction materials.
We’ve developed thermal insulation batches that were recently tested by Teknologisk Institut and have similar thermal conductivity as mineral wool. The project continued being developed by Lendager Group who plans to install it at the UN17 Village project, their recent project in Ørestad.

Picture Philipp Hesse

In collaboration with the Lebanese company Recycle Beirut, a project to facilitate the rare practice of recycling was developed by designing containers for the purpose. The project had an environmental and social focus. As its aesthetics made use of Lebanese well known curtain material to suggest familiarity with the object and incite recycling. Co-creating with (and employing) Syrian migrants that were otherwise lacking sources of income. The product is now on trial phase, as 100 units have been distributed through Lebanese households.
In the project, used sociotechnical analysis to improve waste management through product design in a systemic level.

Picture Philipp Hesse

The bachelor’s thesis project’s area had high traffic levels. I emphasized the challenge of creating an harmony between the public space for the pedestrian and the transit. So, using the inclination of the space, I proposed to elevate a platform about four meters above the ground creating a new and wide, free from traffic, public space that would also include a big market garden and provide entrance to the housing, ateliers and commercial spaces. The platform included bridges which would allow pedestrians and bicycles to circulate over the busy roads towards the sea side. Providing easy accesses to the Tejo river in Lisbon is crucial as this is a very underused value of the city.


Picture Philipp Hesse

Sankt Gabriel’s church, in the northeastern part of Hamburg, was built in 1968 following the tradition of the post war church building program in northern Germany.
Due to the changing societal practices, the parish can not afford the maintenance of the listed ensemble consisting of the church and bell-tower.
The project questions the possibilities to transform the church as landmark for the neighbourhood for a future use and preservation of the building.
The proposed project transforms Sankt Gabriel into a complex for people with dementia under consideration of the financial possibilities of the potential client.

Picture Philipp Hesse

Sankt Katharinen’s Church is the last preserved former monastery church of the Hanseatic city of Lübeck.
Built in the early 14th century, Sankt Katharien was never destroyed or modified. As today’s part of the historical museum of Lübeck and the remains of the other monastery buildings, the church is an outstanding example for medieval Hanseatic architecture.
In 2013, the planning of the renovation of the structural system started.
The client commissioned a historical architectural research to understand the causes of the damages at the construction-temporal roof structure and the medieval brickwork.

Picture Philipp Hesse

Johannisquarter is the oldest part of the old town of Pößneck, in Thuringa.
Through the changes caused by the economical breaks after the reunification of both German states and the demographic development, big parts and urban structures of these area are lost.
Only three listed buildings remain.
The project shows a solution for the future development of the block.
Filling the holes in the city’s structure with new needed functions to repair the public space and offer modern forms of living in the historic heart of the town.

Some of our projects

Picture Philipp Hesse

KalandsGang is an example of outstanding development of the Hanseatic city of Lübeck in the 13th to 16th century.
Providing three floors of just 42m2, the project transferred the so called “Ganghaus” (backyard house) to this modern apartment with the focus on empowerment and respect for the listed building in the center of the world heritage site.
Activating the unknown potentials and showing the layers of more than 600 years was the leading idea of the task.

Picture Philipp Hesse

The historic old town island of Lübeck is since 1987 listed as UNESCO worldheritage site.
In the northeastern part of the historic artisan quarter, lies the project site of “Traufenreihenhaus”, close to the former town walls and harboursides.
The renovation was planned according to the preservation of the historical building materials, in contrast with the use of incorrect materials and colour scheme used in the late 1980‘s work.
The colouring of the facade was finalised after a research in the city’s archives, through different samples on site.

Picture Philipp Hesse

Denmark’s west coast is an outstanding example of local architecture, traditional craftsmanship and use of natural materials.
The project’s aim is to transform the listed building from an old countryside house into a modern family house with the possibility of private farming for the owners.
The project is currently in process, and a proposal will be presented to the client very soon.

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Bispeengen 20F
DK-2000 Frederiksberg

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