The case study focuses on Site 91, a 2 Storey Detached House with a pitched roof. The dwelling has 4 bedrooms and a total floor area of 170 m2. It is constructed using a ground floor insulated strip foundation, Hemp Lime external walls, pitched roof with unoccupied attic space and with flat roof timber frame single storey annex. The house has been designed where the main living areas and bedrooms are all south facing. Over 50% of the glazing area is on the south face with only 10% of glazing on the north face.