Office building at Tanger 73

A nZEB building with an innovative charred timber façade that promotes the sustainable mobility of its users and the relationship with natural elements in the work environment.

Oficines Entegra a Barcelona
Oficines Entegra a Barcelona

Entegra offices in Barcelona

An near-zero consumption office building in 22@ that promotes the sustainable mobility of its users and the relationship with natural elements in the work environment. Due to its carbonized timber façade that reduces the carbon footprint of the building and a series of passive measures that reduce its energy demand, the project obtains LEED Gold certification.


Batlleiroig Arquitectura. Enric Batlle Durany, Joan Roig i Duran, Albert Gil Margalef – Architect


Anna Lloret Papaseit, José Sanz Gorordo, Anna Porta Almagro, Marta Sanz Cuso – Architect


BIS Structures – Structural engineering, ENAR Envolventes Arquitectónicas – Facade, G3 – Building engineers


Patrizia AG, Urban Input

Construction company

OCP – Obra Civil Profesional

Project status


Start date


Finish date


Total area

4736 m2

Outdoor surface

310 m2
© Oriol Gómez
© Oriol Gómez

A developing environment

The Entegra building is located on a corner of the 22@ technological district, recognizing the characteristic chamfered corner of the Cerdà plot. Its plot is part of a planning carried out by batlleiroig in 2008: the planning of the Can Tiana and Fàbrica Pons blocks, in which the studio has already designed several buildings such as the CMT headquarters, the Hotel SB Glow or the Luxa offices.

The program is resolved with a public and open-plan ground level in contact with the free spaces of the block and eight office floors in which the layout of the structural core in the dividing wall allows open, flexible and adaptable workspaces to any company.

© Oriol Gómez

A dynamic access that enhances the passage system

Much importance is given to the urban fit of the ground floor of the building in its surroundings to ensure that it has a welcoming, dynamic access, on a human scale and as permeable as possible with the interior passages of the block.

Due to the creation of the large access porch, located on the corner of the block, it is possible to expand the system of passages, thus enhancing the relationship between the interior and exterior of the building. In addition, the porch pillars are designed in a trapezoidal shape to give the entrance a distinctive look.

© Oriol Gómez
© Oriol Gómez

An innovative façade solution

In keeping with the team’s firm commitment to innovation, the building has a charred timber façade using the Shou Sugi Ban method. This traditional Japanese technique consists in charring the outer layer of the timber, creating a unique and attractive façade with great properties. The controlled charring of the wood gives the façade excellent fireproof qualities, and provides protection from damp, UV radiation and insect attack.

Thanks to this choice, the building’s carbon footprint is considerably reduced and the building’s façade is resolved with low maintenance requirements.

The façade creates an interplay of projections on the various floors, providing protection against solar radiation and reducing energy demand. To the same end, the optimal percentage of glass to solid in each façade was studied, creating the ideal balance between the use of natural lighting and the control of solar radiation or, in other words, between user comfort and energy efficiency of the building.


© Oriol Gómez

Spaces in contact with vegetation and natural elements

Each space of the project is designed to provide well-being to its users. All floors have spaces in contact with terraces and vegetation, in such a way that biophilia is promoted and the relationship between offices and outdoor spaces is intensified.

Inside, particular care is paid to the finishes. The installations and slabs are left visible, incorporating an innovative textured formwork solution that improves acoustic conditioning.

© Oriol Gómez
The Entegra office building is a project that, due to its sobriety, efficiency and innovative proposals, manages to stand out in the 22@ technology district. José Sanz GorordoArchitect / Building / Senior Project Director
© Oriol Gómez

Prioritizing sustainable mobility

The regulations required a provision of car parking , but the access ramp would hinder the system of public spaces that was proposed. For this reason, it is decided to dispense with the parking for cars and thus preserve the prominence of the porch and the connection with the passage.

In exchange, a provision for bicycle parking greater than the regulations is offered, in addition to incorporating changing rooms to promote sports among the users of the building. The vocation of the building is aimed at the well-being of users from the moment they start their journey to work.

In short, the adopeted solution  prioritizes pedestrian connections and sustainable mobility. A commitment to the new mobility paradigm that has left behind cars as the protagonists of our cities.

These measures make the building the first in Europe to obtain the Cycling Friendly certification, which establishes a quality standard for companies that are committed to facilitating and motivating the daily use of bicycles among their workers.

© Oriol Gómez
© Oriol Gómez

Sustainability, a priority in all phases of the project

One of the main requirements from the beginning of the project was to achieve the maximum energy efficiency possible. For this, a logical design is chosen that allows all the sustainability premises to be integrated and coordination between all disciplines is worked to the maximum to achieve it.

The Entegra offices worked from the first phases of the project to establish passive strategies that reduce the energy demand of the building.

All roof elements are designed in white to prevent their materials from absorbing and storing thermal energy. Natural ventilation is also favored thanks to an intelligent system that, through sensors, opens windows on the façade to take advantage of cross circulation as well as for mechanical conditioning.

Entegra was the subject of a study of energy-efficiency measures that has made it possible to reduce the net consumption of primary energy to 23.9 kW/h/m<sup>3</sup> per year, a figure that allows it to be considered as a nearly zero energy building (nZeb) and which represents the maximum energy rating to which you choose by locating yourself in the 22@ district.