Acciona Ombú | Foster + Partners

An innovative exemplar of building reuse

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Release Time: August 2, 2022
PROJECT CREDITS

Client ACCIONA
Appointment 2018
Construction Start 2020
Site Area 15,266m2
Area (Gross) 19,500m2
Number of buildings 2 (existing warehouse above ground, amenities and back of house underground)
Building Dimensions

Warehouse length: 90m
Warehouse width: 30m
Number of Floors 4 Storeys, 2 Basement
Capacity 800 people
Facilities

Office
Public space Garden
Parking facilities 240 cars
Structure

Cladding: existing brick walls (850mm thick), restoration of existing windows with high-performance glass.
Rooflight with Photovoltaic glass
Timber structure (Glulam & CLT): 6000 sqm. Parking: concrete structure
Materials

Timber Structure: Glulam & CLT (1,600 cubic metres) Preservation of 10,000 tons of brick from the existing building.
Sustainability

LEED rating Platinum WELL rating Gold
Presented at COP26, Glasgow 2022 World Green Building Council Case Study
Energy & Carbon

Embodied and Operational Carbon measured, resulting in a 1-planet ecological footprint in line with a 2oC impact, compliant with the Paris Agreement.
Photovoltaic glass: On-site electricity generation
Reuse of a historic building (10,000 tons of brick retained) Use of timber – a highly sustainable material
Highly efficient MEP systems.

Low velocity air supply.
Glass replacement in roof and windows will improve thermal performance of the existing building.
Trees act as a sun filter and contribute towards reducing solar radiation.
Mobility & Connectivity

Connection to train, metro and bus stations
Close to city centre
10,000m2 green area with public access during the day
Water

Rainwater storage and use for irrigation.
Storm water management
Local plants and trees to minimise irrigation.
Materials & Waste

Timber structure from local forests.
Recycling of the entire existing warehouse, avoiding 10,000 tons of waste.
Limited VOC components
Land & Ecology

10,000sqm outdoor space.
300 new trees
Use of local species to reduce water use. Food production on site.

Wellbeing
Large spaces and multiple public routes around the building allow for social distancing
Entry walk-off systems reduce particulates tracked in through shoes.
Air filtration and air quality monitoring. Active VOC, microbe and mould control. Water quality control.
Natural and artificial light design provide visual comfort. Enhanced daylight access and glare control.
Use of stairs promotes the physical activity.
Good sound insulation and comfortable reverberation. Biophilia: Access to nature contributes to better mental health and stress reduction. The building is surrounded by trees and green spaces, which are usable and visible from the inside.
Gathering spaces to encourage social activities.

Culture & Heritage

Restoration of a historic industrial building from 1905

Regeneration of an old industrial area in the city centre.

Prosperity

Brings new jobs to the area and create a local community.

ACCIONA promotes new talent and research units.

Planning for change

New model for office and outdoor spaces for work and meetings.

Project showcases local interventions, pedestrian movement in the city, public transport, low carbon footprint and healthy work environment.

Architect Foster + Partners

Foster + Partners Design Team

Norman Foster

Nigel Dancey Taba Rasti Pablo Urango

Emilio Ortiz Zaforas

Chris Trott Arpan Bakshi Martha Tsigkari Sherif Tarabishy

Collaborating Architect Ortiz León arquitectos

Main Contractor ACCIONA

Structural Consultant ACCIONA

Mechanical Engineers JG ingenieros

Landscape Consultant K8 Paisajismo

Lighting Engineers Artec 3

Timber structure Enmadera (Miguel Nevado)

Facade ENAR (Envolventes Arquitectónicas)

Planning Consultant Addient

SpainMadrid

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

Interior view of building. The project capitalises on the existing load-bearing structure that supports the pitched steel trusses. A central skylight brings natural light to the interior, reducing the need for artificial lighting, while the glazing incorporates photovoltaic technologies that generate electricity. ©Nigel Young / Foster + Partners

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.

Norman Foster, Founder and Executive Chairman, Foster + Partners, said: Ombú brings an industrial wasteland back to a new garden in the city. Madrid s 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.”

Interior view of building. The historic building envelope has been retained to conserve over 10,000 tonnes of original brick and mitigate the environmental impact. The lightweight structure inserted inside the space is made from sustainably sourced timber from local forests and allows for spatial flexibility. ©Nigel Young / Foster + Partners

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.

Exterior view of building. 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. ©Nigel Young / Foster + Partners

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.

Interior view of building. The lightweight structure inserted inside the space is made from sustainably sourced timber from local forests and allows for spatial flexibility. ©Nigel Young / Foster + Partners

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.”

Night exterior view of building. 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. ©Nigel Young / Foster + Partners

Taking advantage of Madrid s 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.

Interior view of building showing the lightweight timber structure inserted inside the space. The timber structure saves more than 1,600 tonnes of CO2 and is recyclable and demountable. ©Nigel Young / Foster + Partners

Located in the lively Arganzuela district, Ombú also benefits from direct access to rail and bus networks, encouraging employees to travel by public transport.

Detail view of timber structure. The lightweight structure inserted inside the space is made from sustainably sourced timber from local forests. ©Nigel Young / Foster + Partners

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.

The historic building envelope has been retained to conserve over 10,000 tonnes of original brick and mitigate the environmental impact. ©Nigel Young / Foster + Partners

ACCIONA s vision for the future aligns with the practice s 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.

Courtyard adjoining the building. Taking advantage of Madrid’s temperate climate, the new courtyard offers the option to comfortably work outdoors. ©Nigel Young / Foster + Partners

Presentation drawing - Floor plan ©Foster + Partners

Section sketch by Norman Foster. The building 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. ©The Norman Foster Foundation

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# Architecture Design # 办公楼设计 # 办公建筑

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