Researchers at the Sustainable Earth Institute at the University of Plymouth are constructing a building on campus using the mud and fibre material. The single-storey building will be a classroom and laboratory, with its performance studied and monitored. Project bosses said it would be a "living lab and demonstration site".
The construction work is part of the institute's CobBauge project, which the university said was "investigating whether an optimised version of cob can become a sustainable solution for a new generation of energy-efficient housing".
Prof Steve Goodhew said one of the major issues was trying to "reduce the energy use, and therefore the emissions, in buildings".
Prof Goodhew said the work was trying to find out if "we can drop the amount of cement we use... [by] physically using alternative natural building materials".
However, the new building is being constructed with a version of cob that has been analysed in a laboratory, with those involved trying to choose the best soil and fibres for the job, in this case hemp.
It also has to prove it can withstand heavy loads and any weather conditions thrown at it to ensure it can pass building regulations.