The scheme is on a 24ha working farm in the Axe Valley on the Dorset/ Devon border, and will include the renovation of a 17th-century cob farmhouse and an 18th-century threshing barn, as well as new buildings.
The two existing buildings will act as one of two event spaces, with the main kitchen as the other.
For the new buildings, Satellite has designed a 'fully sustainable glass, steel and rammed-earth event space', which will be the focal point of the new scheme.
The buildings also have 'fully opening' glass walls, allowing the event space to open into the courtyard and out onto the Axe Valley.
The new headquarters will act as a home for all River Cottage activities, as well as acting as a new studio for the filming of the River Cottage TV series.
The site is being developed to guarantee low-carbon emissions, and will also use a renewable-energy system. All building materials will be sourced locally .
Satellite director Stewart Dodd said: 'It is fantastic to have a client who is so resolute in his commitment to sustainable architecture.
'We are excited to be working on a project that combines contemporary architecture and modern construction techniques with the local and historical building techniques of Devon in an entirely sustainable design.'
Completion is planned for 2008.