6 questions. 6 answers. An interview with Gülcan Subasi

A clear commitment to sustainable construction.

• Question 1: New construction – How can a climate-neutral new building still be built cost-effectively today?
  “Climate neutrality and cost-effectiveness are not mutually exclusive – but they must be considered together from the very beginning. A holistic approach is key: compact structures, optimized building envelopes, and robust systems rather than technological overengineering.”

 

• Question 2: Renovation – What are the most common mistakes in renovation planning – and how can you avoid them?
  “The biggest mistake is taking action without a strategy – many people renovate piecemeal, thereby hindering future steps. Our recommendation: first, conduct a thorough assessment of the existing conditions; then, develop a clear renovation plan; and finally, carry it out.”

 

• Question 3: Circular economy – How can the circular economy be effectively integrated into the construction process?
  “It starts with the planning phase: selecting materials, ensuring they can be dismantled, and maintaining consistent documentation through a material pass. Certification systems such as DGNB help make these criteria measurable and verifiable.”

 

• Question 4: CSRD & ESG – What do CSRD and ESG requirements actually mean for building owners and investors?
  “Any company that cannot bring its building portfolio into compliance with ESG standards faces financing and marketing challenges. We help our clients collect the relevant metrics and prioritize the implementation of measures – so that ESG creates real value rather than administrative burden.”

 

• Question 5: BIM – What role does BIM play in modern building physics and sustainability consulting?
  “For us, BIM is not an end in itself, but a practical tool – from energy simulations in new construction to digital material passports and ESG databases. Those who consistently use BIM benefit from better documentation, fewer errors, and greater transparency throughout a building’s entire lifecycle.”

 

• Question 6: The Future of Consulting – How will the role of sustainability consulting change in the coming years?
  “The role is becoming more strategic and is being integrated earlier in the process – because the most effective decisions are made during the early planning phases. At the same time, consulting must become more robust, data-driven, and process-reliable.”