Who We Are?

Taller 4D9 is a Barcelona based interdesciplinary group operating within the fields of design, architecture and urbanism.

Due to that we can exchange the knowledge from one field to the other. Everyone participates just like a human tower, so that with everybody's efforts we can build stronger ideas

What We Do?


Project planning. Public space design. Landscape Architecture.


Bioclimatic architecture. Construction of low environmental impact. Interior architecture projects. Projects for commercial spaces. Ephemerial architecture.


Product Design Project. Furniture design. Tools design. Automotive design. Design of craft products. Ecodesign.


Corporate design. Brand design. Web design. Packaging design.


On Earth, in our beloved planet, the current situation is unsustainable from an ecological, economical and social points of views.

In this scenario, the designer of cities, neighborhoods, buildings or objects should be aware of these problems to minimize them through responsible and sustainable designs.

To find solutions to the current needs in this delicate and complex context, we opted for multidisciplinary practice because different disciplines can interact and help each other in time to imagine and explain the proposals.

On the other hand the interest in different disciplines such as architecture, design and photography is really the result of a common interest in the activity and life of man.


Sergi Hernandez started Taller 4D9 in 2010 after some years of experience in the field of architecture and design

He has a Degree in Architecture at Higher Technical School of Architecture of Barcelona, and a Degree in Product Design at Higher School in Design and Fine Arts in Barcelona. He has participated to Master in Architectonic Structures, at Catalonian Politechnical Foundation. He also has worked as computer specialist and he has participated at Java Programmer Analyst and Web and Multimedia Design courses.