Ombú - a transformative office building for the Spanish infrastructure and energy company ACCIONA - has officially opened...

Ombú by Foster + Partners has officially opened

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From the architect: This retrofit project breathes new life into a historic industrial building in Madrid, creating a sustainable exemplar of building reuse and revitalising the surrounding area. With over 10,000 square metres of new office space, the project unifies a unique mix of private and public land with green landscaping that extends to the adjoining Méndez Álvaro station.

Ombú by Foster + Partners has officially opened

Ombú has a 1.0 Planet Ecological Footprint, meaning its carbon emissions will be absorbed by the current capacity of the earth. This achieves the balance of sources and sinks required by the Paris Agreement, with its environmental impact compatible with the original +2°C target.

Ombú by Foster + Partners has officially opened

Norman Foster, Founder and Executive Chairman, Foster + Partners, said: Ombú brings an industrial wasteland back to a new garden in the city. Madrids benign climate allows workspaces to be outside as well as inside, creating a flexible and desirable lifestyle. Natural materials are brought into the existing building, contributing to biophilic spaces that are good for wellbeing and productivity.”

Ombú by Foster + Partners has officially opened

Originally built in 1905 by the architect Luis de Landecho, the building once supplied energy to the surrounding areas. It later fell into disuse until ACCIONA acquired it in 2017, saving it from demolition, a fate that other similar structures in the area had experienced in recent years. The project capitalises on the existing load-bearing structure that supports the pitched steel trusses. The historic building envelope has been retained to conserve over 10,000 tonnes of original brick and mitigate the environmental impact.

Ombú by Foster + Partners has officially opened

The lightweight structure inserted inside the space is made from sustainably sourced timber from local forests and allows for spatial flexibility, while also integrating lighting, ventilation and other services. The timber structure will save more than 1,600 tonnes of CO2 and is recyclable and demountable. A central skylight brings natural light to the interior, reducing the need for artificial lighting, while the glazing incorporates photovoltaic technologies that generate electricity.

Ombú by Foster + Partners has officially opened

Taba Rasti, Senior Partner and co-head of the Madrid studio, said: The new design retains and enhances the original masonry structure, while upgrading other aspects of the building and extending its life by introducing new flexible workspaces - giving it a sustainable legacy for years to come.”

Ombú by Foster + Partners has officially opened

Taking advantage of Madrids temperate climate, a new courtyard offers the option to comfortably work outdoors. The courtyard connects to a large 12,400 square-metre park with 350 trees featuring outdoor working spaces and areas for informal meetings sheltered by a green canopy of trees. Local species have been carefully selected to reduce water consumption, which will come from local sources. The new green, public space connects the building with the surrounding community and generates a positive social impact. Located in the lively Arganzuela district, Ombú also benefits from direct access to rail and bus networks, encouraging employees to travel by public transport.

Ombú by Foster + Partners has officially opened

One of the most sustainable projects by Foster + Partners, the project was presented by Chris Trott, Head of Sustainability at COP26 in Glasgow as a case study for the World Green Building Council. Using the concept of Ecological Footprint, the impact of the project was quantified and improved across all aspects of the development; its carbon footprint has been carefully measured and controlled. The design reduces embodied carbon by 25 percent when compared to a new build over the whole life of the project, while making allowances for future refurbishment. The operational energy is calculated to be 35 percent below normal expectations.

Ombú by Foster + Partners has officially opened

ACCIONAs vision for the future aligns with the practices commitment to developing bespoke design solutions that are optimised for their operations and the planet. Working closely with ACCIONA and the local collaborating architects Ortiz León architects, the practice has addressed sustainability holistically to realise this unique retrofit project and rejuvenate the surrounding area.

Ombú by Foster + Partners has officially opened

Architect: Foster + Partners
Client: Acciona Inmobiliaria
Location: Madrid, Spain
Year: 2022
Area: 19,500 sqm
Collaborating Architect: Ortiz León arquitectos
Structural Engineer: Acciona Ingeniería
Environment Engineer: JG ingenieros
Landscape Architect: K8 Paisajismo
Lighting Engineer: Artec 3
Photography: Nigel Young / Foster + Partners

Ombú by Foster + Partners has officially opened

Ombú by Foster + Partners has officially opened

Ombú - a transformative office building for the Spanish infrastructure and energy company ACCIONA - has officially opened...

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