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© 2025 KKCG. All rights reserved
KKCG Real Estate Group is transforming the former Sazka administrative headquarters in Prague into a flagship example of circular construction. The four wing building from the early 1990s is being completely renewed with a new facade and redesigned interior. The goal is to retain the structural skeleton, reuse and return as many materials as possible, and reduce embodied emissions through low carbon materials such as aluminum and glass with a proportion of secondary raw materials. The project aims for LEED Gold certification.
Selective deconstruction was chosen instead of demolition. Together with Pelčák a partner architekti, CASUA, NOVECON, CYRKL Resource Platform and UCEEB CTU, the team carried out material inventory, BIM passporting and a pre-renovation audit. This made it possible to plan material flows and prevent downcycling.
Materials and interior equipment were handed over, donated, or sold for further use. Items such as glass partitions, sanitary equipment, carpeting, glazing, timber and even complete recording studios were transferred to nonprofits, hospitals, schools, material banks and art organizations. A key achievement was returning 31 tons of carpet tiles to Tarkett for remanufacturing.
Results to date
The building contains an estimated 4,000 tons of construction material. The project aims to achieve an 85 percent recycling rate and at least 20 percent secondary raw materials in new installations. The first phase closed financially at break-even which confirms that selective deconstruction can be economically viable when carefully planned.
Circular design principles guide the next phase. The existing steel and reinforced concrete structure will remain. Selected original elements will be reintegrated in new forms, for example crushed facade tiles used in new exterior seating. A classical material passport combined with a BIM model informs procurement and ensures that materials with recycled content are prioritized.
“We want to prove that circular construction is not an idealistic concept, but a fully realistic and operationally efficient strategy. Our goal is not only to recycle materials, but to return secondary materials back into the building in the form of new products.”
By retaining the structure, reducing waste and increasing recycled content, the project lowers embodied carbon and supports the development of circular construction in the Czech Republic. The recognition from the World Green Building Council confirms that responsible renovation can be environmentally and financially efficient, while setting a benchmark for future large scale circular projects.
