Building homes at high density is, in fact, more expensive than traditional low-density housing, the London Housing Federation has warned.
The federation has carried out research that, it has insisted, explodes the myth that high-density housing is cheaper, and it has demanded that the government take into account the new figures in the London Plan and any other new planning developments.
The research claims that hitting the government's target densities can add up to £14,000 to the price of a new home.
The federation has also called on the Housing Corporation to consider the new information when it allocates funding.
Federation head Berwyn Kinsey said: 'This work simplifies what can be a very complex issue for developers, such as how to ensure that new developments of affordable family housing, built at higher densities, are fit for purpose and sustainable.
'Higher-density housing is sometimes viewed as a cheap option, but what we have discovered is that it doesn't work if you cut corners. We hope that the standards we have set will be adopted in planning guidelines and that the additional funding will be made available to put them into practice,' he added.
The research can be downloaded for free from www.housing.org.uk/libraryby Ed Dorrell