Affordable housing is constructed in the same way as all other domestic housing, and similarly costs vary according to size and specification. Communities and Local Government has not carried out any recent work on the average cost of constructing an affordable housing unit in London. The Department for Business, Enterprise and Regulatory Reform publishes data on construction costs, in the form of the Construction Cost and Price Indices which are available on a quarterly basis either in hard copy or online via the Building Cost Information Service website at:
http://www.bcis.co.uk/BCISWEB/ProductSearch/Product Search.aspx?next=product&productid=156