Domestic GBIS (Green Business Investment Scheme) funding supports investments in energy efficiency and renewable energy projects within the residential sector in the UK. The scheme aims to provide financial incentives, such as grants or low-interest loans, to homeowners and landlords for installing energy-efficient measures like insulation, solar panels, and heat pumps. This funding helps reduce energy consumption, lower carbon emissions, and decrease energy costs, contributing to the UK's broader environmental and sustainability goals.