According to a report from the National Housing Federation, only an “exclusive members club” will be able to afford houses:
http://www.housing.org.uk/media/press-releases/homeownership-is-becoming-an-exclusive-members-club/
As for “affordable” homes, they should be no more than 80% of the cost of owning or renting a home on the open market.
If a home costs £200,000 and rents for £800 a nonth that would be £160,000 and £660 a month. But if a home costs £400,000 and rents for £2000 a month then that’s £ £320,000 and £1,600 a month. It is not based on what people can afford, just a simple mathematical formula.
So, why are we building more and more expensive properties in East Devon?