Only a few days to go: We’re raising £25,000 to keep TheyWorkForYou running and make sure people across the UK can hold their elected representatives to account.Donate to our crowdfunder
As part of the detailed modelling undertaken for our 1.5°C compatible plan, we estimated that the total capital cost of undertaking energy efficiency retrofits across all existing buildings to be approximately £10 billion (discounted) between now and 2050. Additional building level upgrades such as heat pumps & hybrid heat pumps are not included in this figure. They are detailed on page 26 of the plan.
The model assessed building energy performance against a series of packages which would be required over and above business as usual, to retrofit the existing building stock in London to required emissions levels.
The detailed research and the Zero Carbon pathways tool, which details our assumptions can be found https://www.london.gov.uk/what-we-do/environment/climate-change/climate-action-plan.
Without seeing the research and assumptions behind the London Assembly Research Unit study it is difficult to take a view on the estimate.