About GCG
We are a building science–driven consulting firm specializing in the commercialization and technical adoption of high-performance building products in the U.S. and Canadian markets. With more than 15 years of experience in high-performance building in the European and U.S. market, we combine deep Passive House and advanced building envelope expertise with strategic market development to help innovative European technologies succeed in North America.
Unlike traditional consulting firms, we don’t stop at research and planning—we become part of the project team, applying technical insight from energy performance and hygrothermal evaluation, and field-level understanding of U.S. construction practices to ensure successful product integration. We take responsibility for execution and maintain involvement beyond implementation, delivering measurable outcomes and building long-term partnerships across the building industry.
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Our Mission
Support transatlantic collaboration to accelerate the market adoption of innovative building products and technologies that improve the social, economic, and environmental well-being of our communities and ecosystems.
Founder & Principal Consultant
Stefan Goebel
German-native Stefan Goebel is the founder of GCG and a certified Passive House Consultant, LEED Green Associate, and Building Science Professional with extensive expertise in high-performance building design and energy-efficient construction. Based in the U.S. since 2015, he relocated from Cologne, Germany to Boston to establish the U.S. branch of a German industrial group and now draws from more than 15 years of international business leadership and industry experience across Europe and North America.
Stefan has deep technical and practical experience in the high-performance building sector, including over eight years of consulting on Passive House and advanced building envelope projects, with hands-on expertise using hygrothermal analysis, air-tightness strategies, enclosure detailing, and energy-performance modeling. In addition, his earlier career in the automotive and automation industry (Porsche and Ford in Germany) provided a strong foundation in precision engineering, Lean processes, and technology-driven innovation.
With a dual background in building science and market expansion strategy, Stefan specializes in introducing innovative European building products to the U.S. market and supporting their successful adoption through technical validation, local expertise, and a robust network of architects, builders, and developers. He holds a bachelor’s and master’s degree in Engineering from the University of Applied Sciences in Cologne, Germany.
Stefan is deeply committed to advancing energy efficiency and sustainability in the built environment. He serves as Vice President of a local Passive House Alliance chapter and works actively to accelerate the growth of Passive House adoption and next-generation building technologies across the U.S..
