Development of sustainability, ESG and decarbonization strategies for portfolios and individual properties, as well as the development of corresponding CO2 reduction pathways, guidelines and tools for builders and institutional investors. Creation of condition and potential analyses (Due Diligence) and renovation concepts. Support for builders through competition accompaniments, sustainability pre-checks and QS mandates. Portfolio certifications according to common building labels (GEAK, SNBS, DGNB, LEED, BREEAM, Minergie-Eco) for quality assurance and improvement of the GRESB rating. Consulting and planning of construction projects in the areas of building physics, acoustics, building simulations, heating replacement, building technology, pollutants and building ecology, as well as the implementation of certifications according to GEAK, SNBS, DGNB, LEED, BREEAM or Minergie-Eco. Furthermore, the provision of services in the context of technical quality assurance/Commissioning/Start-up management.