Christensen & Co Arkitekter (officially CCO Architects) is a Danish architecture firm based in Copenhagen, founded in 2006 by Michael Christensen. It is recognized for its focus on creating high-quality buildings that prioritize both human well-being and environmental responsibility. As of 2025, the firm has completed over 500,000 square meters of building projects distributed across culture, sports, education, housing, and workspace sectors. The partner group includes Vibeke Lydolph Lindblad (the managing director), Thomas Nørgaard, Michael Werin Larsen, Mikkel Hermann Sørensen, and Marie Partoft.
Recent growth has seen the integration of RITA arch, an interior design firm, in 2024, and landscape architects Thing Brandt in 2025, reflecting an expansion into holistic design where landscape, architecture, and interiors are conceived as integrated solutions. CCO’s practice extends beyond Denmark into Scandinavia, Europe, and North America, with collaborations on student residences at the University of Toronto and partnerships in Canada.
The firm's portfolio includes notable projects such as the Green Lighthouse at the University of Copenhagen (Denmark’s first carbon-neutral public building), the Niels Bohr Building, and several major buildings at the Technical University of Denmark. They are known for large public projects—recent examples include new buildings for DTU, Helsingør Power Plant HQ, and transformation of Club Denmark Hall in Valby into an activity-focused sports venue. CCO approaches each project with user involvement and interdisciplinary teams, emphasizing both social utility and sustainable solutions down to life cycle assessment and timber construction.