We think and act sustainably and holistically. In doing so, we take all facets of sustainability into account. Economy, ecology and functionality are inseparable for us. We call this basic principle ‘the blue way’.  It pervades our entire company – internally and externally.

Our cooperation is based on partnership and transparency. We have a financial focus. We want to grow and generate good profits. We share these earnings with our employees. ‘the blue way’ also governs our interaction with our clients.

‘the blue way’ milestones

1986 - introduction of building simulation

Spurred by the first oil crises of 1973 and 1979, we tackled the issue of energy consumption. We developed a mathematical model that simulates the energy consumption of a building – even at the project definition stage. As a result, our clients know how a building must be designed to minimize energy consumption even before planning starts.

1992 – Eco-management for Potsdamer Platz in Berlin

Reduction of heat consumption

Optimal thermal insulation and the use of passive solar energy reduced heat consumption in Potsdamer Platz buildings. Sophisticated facade concepts with natural ventilation were used for all office buildings – including high-rises. The result are energy savings of up to 50 percent compared to conventional air conditioning systems. 

Lower carbon emissions

The Eco team ensured the use of a cogeneration plant, which supplies the entire Potsdamer and the neighboring Leipziger Platz with power. Waste heat from the system meets all the heating and cooling needs. The result is a 75 percent reduction in carbon emissions compared to the originally planned separate plant rooms.

Environmentally friendly building materials used

The Drees & Sommer team stipulated that ecological and healthy building materials had to be used for the most important trades. The result is a saving of more than 22 metric tons of HCFCs. The achievements of ‘the blue way’ were given retrospective recognition in 2012. The Potsdamer Platz became the first established quarter to be awarded the DGNB (German Sustainable Building Council) Silver Certificate.

1999 – ahead of its time – Drees & Sommer in Untere Waldplätze 11, Stuttgart, Germany

Reduced heating demand, use of geothermal energy

A highly insulated façade and triple-glazing resulted in a massive reduction in the heating requirement. Heating and cooling pipes installed in the concrete slabs (concrete core temperature control) turned the slabs into huge radiators. The use of geothermal energy with boreholes about 80 meters deep reduced energy consumption to one-fifth of the current standard. Carbon emissions were halved.

Obere Waldplätze 11 is a pioneering building, pleasant and a model of ecology. It offers considerably reduced building operation costs without substantially increased overall investment.

Thanks to these characteristics, in 2009 the DGNB awarded it Gold certification in the New Building category – ten years after its construction! This was followed by DGNB Gold for Established Buildings in 2011.

2003 – Mature Project Communication System (PCMS)

This, too, is an element of the blue way’: Smooth cooperation between all project participants contributes significantly to the success and quality of a project. Efficient project organization saves all stakeholders both time and money. As a central platform, PCMS guarantees a standard data and document base. This ensures that the projects participants have ready access to all project data, in particular to planning documents, ensuring swift continued processing. Architects, principals, planners und contractors store their planning documents and minutes in the PCMS, allowing time-saving exchange of data.

2007 – Drees & Sommer becomes a founding member of the DGNB

the blue way’. That is why it was essential for Drees & Sommer to help shape the DGNB as a founding member.

2008 – Green Building campaign

In numerous discussions with principals, property managers and politicians about sustainability and Green Building, we often hear same comment: ‘I am really interested in the subject, but know far too little about it to form an opinion and join the discussion.’

So we launched a campaign to close such gaps in knowledge in a simple and understandable way. It started with Expo Real 2008, followed by a whole series of presentations, client events, press releases, and the publication of the reference book Green Building. Thanks to our campaign, Green Building has become firmly established in the real estate industry. Today, sustainable building is considered an absolute must.

2010 – Optimization of established properties

Many established properties have one key flaw. They are excessively expensive to operate. High consumption values make the properties uneconomical. And gradually, the number of tenants declines. Measures must be taken to improve performance. But how can these be economically planned and implemented? A typical task for holistic solutions in line with ‘the blue way’. Because when it comes to complex renovation projects, it is crucial to keep the owner’s overall strategy front of mind. This is ensured by our tiered analysis, in which we combine possible options with a holistic perspective. We then recommend courses of action specifically tailored to the particular case, and implement the measures involved. A revitalized building must be more economical than before – only then does the strategy work in the sense of ‘the blue way’.

2012 – The Blue Way for the energy transition

1. Reduction of consumption

  • Efficient facades
  • Use of geothermal energy
  • Intelligent building services equipment
  • Efficient lighting systems
  • Energy monitoring

2. Energy generation

  • Wind
  • Combined-cycle gas and steam turbine power plants
  • Cogeneration plant
  • Swarm technology (connection and control of many privately owned small power plants)

3. Energy storage

  • Batteries that can store excess energy for hours, days and, if necessary, even weeks
  • Use of excess electricity to produce hydrogen

4. Energy distribution

  • High voltage direct current transmission (HVDC) for low-loss transmission of power
  • Smart grids

‘the blue way’ means integrating the necessary measures into an overall process. Politicians must define this process and ensure financing of the necessary additions to the network. Industry must ensure that renewable energy sources become competitive. Such development requires a complete change of subsidies policy and amendment of the German Renewable Energy Sources Act (EEG).

2015 - Digital Blue

The demands on buildings are increasing. They are required to be networked, energy self-sufficient, zero-emissions, healthy, integrated und flexible. One key element prevents them becoming true Blue Buildings: operating efficiency. Digital Blue integrates digitization. This results in better, more economically viable buildings – fully in keeping with the spirit of ‘the blue way’.

We achieve this, in part, through digital design with Building Information Modeling (BIM), as well as through modular construction and lean management. The Cradle to Cradle® approach also benefits from digitization. The material passport contains all relevant information on the materials and designs used in the project from a building ecology perspective.

2016 - Blue City – Integrated Urban Solutions

Around the world more and more people are living in cities. Many developments – which are often mutually exacerbating– are throwing up numerous challenges. The tasks involved require close cooperation between a range of disciplines. Factors to be taken into consideration include economic, ecological, functional, social and esthetic aspects of urban areas.

Energy, climate, resources, mobility, infrastructure, digitization, finance and society – all of these factors affect cities and influence urban life.

In the spirit of ‘the blue way’, we deliver networked solutions and integrate their individual components to create holistic approaches and concepts that are specifically tailored to our clients’ challenges.

2016 – Information and Communication Technology (ICT)

We support clients through the digital transformation by providing consultation services on an economic basis specifically directed at anything and everything relating to ICT. Drees & Sommer experts are extremely skilled in focusing their consultancy services on clients’ strategic requirements and in designing and supporting projects operating at the interface between digitization, IT and construction. We provide stimulus and ideas, and we bring the latest developments into line with IT and construction project imperatives. Click here to find out more.


2016 – Projekt SmartSite: Construction Sites are Becoming Intelligent

Germany's roads are in constant need of attention, requiring over two billion euros to be spent on them every year because poor quality road construction has created a constant need for remedial work to be undertaken.

As leader of the consortium working on the SmartSite research project, Drees & Sommer is therefore getting road construction ready for the digital future. The project is concerned with the cloud-based, autonomous control of road construction machinery, aimed at improving project quality and making projects run more efficiently while consuming as little energy and as few resources as possible. Click here to find out more about the SmartSite research project.

2017 – Real Estate Usability (UX)

In the future, buildings will be perfectly tailored to meet the needs of their users. Digitization makes this possible, and people’s changing requirements demand this kind of flexibility. Drees & Sommer is meeting the challenges of tomorrow with buildings that function perfectly, linking elements such as clients’ requirements for workplace design, architecture, sustainability and cost-effectiveness.


2018 – Launch of the Building Material Scout (BMS)

Building materials that present no risk to health, that promote wellbeing and that can easily be recycled after use are an important step toward the circular economy. In an effort to achieve these objectives Drees & Sommer is working together with like-minded partners on the digital platform. Experts use the platform to gather and structure information on building materials, and then make it available to industry stakeholders.