Drees & Sommer

Drees & Sommer

Core business

Drees & Sommer is an international consultancy with more than 50 years experience, that helps its clients meet their goals by offering services in the fields of Cradle to Cradle, Green Buildings, Green Cities, Circular Economy, Energy Transition, Smart Buildings and network cities/digital technology.

Products & services

• Optimal certification and detailed environmental assessment
• Lifecycle assessment
• Carbonneutral Green Building concepts
• Special controlling to ensure that targeted building quality and operational outcomes are achieved
• Optimization of building operations
• Reduction of operating costs
• Portfolio optimization through lean approaches to energy and sustainability
• Strategic development for cities, local government authorities and companies
• Sound initiation, planning and control of sustainable development processes (competition management, technical due diligence, and technical and economic controlling
• Development of integrated solutions from master plan to building concept
• Innovative approaches through expert network and involvement in research and development projects
• Sustainability consulting
• Analysis of urban planning drafts and projects (performance specifications, design guidelines, potential analyses)



Major CleanTech projects

Drees & Sommer takes a multidisciplinary approach to initiating, planning and managing development and renewal processes for entire cities, districts, and individual buildings and properties. Future-proof solutions have to address many stress factors – and develop holistic concepts. We take into consideration economic, ecological, functional, social and esthetic aspects of urban areas, as well as healthy, energy-efficient buildings and visionary mobility concepts. Drees & Sommer calls this holistic approach ‘the blue way’.

Technical / technological capabilities

Sustainability consulting right through to district and real estate certification by experienced auditors for all systems (DGNB, LEED, BREEAM etc.);

Technical consulting and planning (energy and climate protection concepts, general technical planning, environmental assessments, life-cycle cost calculations, simulations, noise measurements, and mobility concepts etc.)

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Drees & Sommer


Maximilien Ast
Lothar Diederich
Heiko Butter

Creation date




Organisation type

International Organisation

Trading area

Luxembourg, Greater Region, Europe, International

International locations

Greater Region, Europe, Asia, North America


6c, Rue Gabriel Lippmann
L-5365 Munsbach
Tel: 26 12 05 5550


Maximilien Ast
Lothar Diederich
Heiko Butter

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