The UK has a serious shortage of affordable homes. Lesley Curwen asks whether the current system - where councils do deals with developers to provide cheaper homes - is working.
Lesley examines three case studies - the huge redevelopment schemes at Earl's Court and on the Greenwich Peninsula, as well as a development in rural Suffolk. She asks whether developers are being allowed to duck their obligations to provide affordable homes as a condition of planning permission. Are councils too under-resourced and under-skilled to negotiate with large development companies?
And what of the commuted sum - where developers pay a fee in lieu of providing affordable housing? How is that working?
Lesley hears from New York where the new mayor has instituted a system that spells out what the city needs and wants, cutting the necessity for protracted negotiation.
Produced by Susan Marling
A Just Radio production for BBC Radio 4.