Located in the heart of the Cotswolds, Hill Barn was a derelict 300 year old stone structure situated in a prominent and beautiful location at the top of a hill in an Area of Outstanding Natural Beauty. Being in AONB open countryside, together with the fact that there was a Housing Moratorium in the area, made the prospect of obtaining planning permission extremely unlikely.Underhill House is also designed as a Passivhaus – a German standard resulting in a 90% reduction in carbon emissions compared to that of an average home. This project was in fact the first certified Passivhaus in England and featured on Grand Designs.