Existing housing stock Learn how we're improving social and council houses through the Decent Homes Backlog Programme across the capital. Housing design The Mayor is investing to improve the quality of both new and existing homes in London. Find out more. Energy in buildings Working to reduce energy demand in buildings. Boiler cashback scheme Get £400 from the London Boiler Cashback Scheme to replace your old, inefficient boiler and cut your energy bills. RE:NEW programme The Mayor’s award-winning programme to help make London’s homes more energy efficient. RE:FIT programme The Mayor’s award-winning programme to help make London’s non-domestic public buildings more energy efficient. Related content Estate Regeneration Guide Have your say on the Mayor's draft Good Practice Guide to Estate Regeneration. Development sites map Find out how our land is being developed to create new homes and jobs for Londoners. Homes for Londoners See how the Mayor is tackling the housing crisis and building more affordable homes.