Located at the late Victorian country house run by the National Trust, the facilities are being built for the Cycle Hub.
Designed by Plymouth-based architects Stride Treglown, the buildings will include a café-cum-kitchen, toilets, and cycle hire with bike store and a workshop space.
The café and cycle hire facilities will be built on two adjacent sites.
They will be clad in timber with a zinc standing seam roof and gabion walls, which are essentially stone filled wire blocks designed to help the building blend into the existing environment.
Hub buildings are part of wider plans to create approximately six miles of new off road cycle trails in woodlands to the north of the estate, as well as a cycle skills area.
The trails will cater to both inexperienced and family cyclists, and would be graded green for easy terrain and blue for moderate terrain.
The cycle trails will complement the recently opened trails at the Forestry Commission Cardinham Woods, which are aimed at more experienced cyclists.
Kevin Hendy, contracts manager for Morgan Sindall, said as cycling becomes increasingly popular across the South West, the new trails at Lanhydrock are expected to receive a large number of visitors each year.
The Cycle Hub received investment from the Rural Development Programme for England (RDPE), and is due to open to the public in spring 2014.
