The environmentally advanced designs respond to a south-facing streamside site, where the 55m-long building presents an 'inhabited hedge-bank' between the stream and roadside-hedge.
The accommodation block has been funded by the Springhead Trust, a charity promoting creative arts, sustainable living and environmental education through residential courses.
Hetreed Ross secured the contract, which had to be able to offer hotel-quality double rooms for adults as well as accommodation for school children.
The result was this innovative design, offering 14 en-suite twin bed rooms with a twin-bed layout for adult visitors.
Each room also features a loft tucked into the high-rolling roof section over the en-suite to provide a further two beds, making each room ideal for family use or for four schoolchildren.
The environmental impact is minimal, as lime-rendered straw bale external walls enclose rooms defined by rammed-earth partitions, set out under an exposed larch round-pole roof structure.
Partner Jonathan Hetreed said: 'The environmental, social and aesthetic aspirations embodied in the brief, the dedication and enthusiasm of the trustees and the superlative qualities of Springhead as a place and a site have made this project truly special for us.
'Chalk floors, rammed-earth and straw-bale walls, round-pole roof structure and a turf finish will make this a truly local exercise in sustainable design and construction, as well as a delightful and inspiring place to stay.'
The total cost of the project will be £512,000, and it is hoped it will go on site early next year.