Find out how we are improving the quality of new and existing homes across the capital. 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. Warmer Homes If you're a Londoner on benefits you may be eligible for free home improvements to make your heating more affordable. Energy in buildings Working to reduce energy demand in buildings. 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. Zero Defects Charter Find out about how the Mayor is working with industry to improve the quality of new homes in London. Routes to redress Find information about redress schemes you can access if you have a problem with the quality of your new home. PMH viability app Our open-source app Prism is a user-friendly way to asses the viability of precision manufactured housing schemes. Related content Estate Regeneration Guide The Mayor is ensuring residents are involved in estate regeneration. Development sites map Find out how our land is being developed to create new homes and jobs for Londoners. London Housing Strategy The Mayor has set out his plans to tackle the housing crisis.