Average house prices in Devon and Cornwall are 13 times the average annual individual wage, according to the National Housing Federation (NHF). It said the average house in Cornwall costs Â£228,585, with the average individual salary at Â£17,628 a year. In Devon, the average home costs Â£241,575, with the average income at Â£17,940 a year, the organisation has said. The NHF added there was a greater need for affordable homes. 'Housing crisis'