This guide from the World Green Building Council’s (WorldGBC’s) Europe network and EeMAP's partner E.ON sets out how they believe the sectors and stakeholders involved in delivering green buildings should support the growth of energy efficient mortgages. In their 2018 report Creating an Energy Efficient Mortgage for Europe: Towards a New Market Standard, WorldGBC set out high level actions to be taken by banks and financial institutions, government and policymakers and by the building sector and energy companies to establish and implement a common market standard for energy efficient mortgages in Europe. This guidance note builds on that report by explaining in more detail the support lenders and their customers need from non-financial organisations across the green building value chain. It represents a roadmap for market development at mass scale and therefore an opportunity to transform millions of buildings across Europe. The supporting actions outlined in this guidance note have been developed using evidence gathered from around Europe over the past two years of the Energy Efficient Mortgages Initiative. One of the key recurring themes across all of this work has been the importance of considering the needs of the borrower in order to ensure energy efficient mortgages have broad appeal.