The Warm Homes Grant Guidance explains the upcoming national Warm Homes Plan due to launch from 2026, backed by a £15 billion government funding commitment aimed at upgrading millions of homes across the UK to be warmer, more energy efficient and cheaper to run. This new scheme is designed as a long-term replacement and expansion of earlier energy efficiency programmes, focusing on providing free home upgrades to households that qualify based on property suitability and household circumstances. Under this guidance, eligible homes may be able to access free insulation, free solar panels, free heat pumps, free heating improvements and other energy-saving measures with little or no upfront cost, helping families reduce energy bills, improve indoor comfort and protect themselves from rising energy prices. The Warm Homes Plan places strong emphasis on whole-home improvements rather than single measures, meaning that grants are intended to improve how a property performs overall, not just replace one system. Free energy efficiency upgrades are expected to prioritise homes that are harder to heat, properties with poor insulation, and households struggling with high energy bills, ensuring funding is targeted where it can deliver the greatest benefit. Unlike short-term schemes, this national Warm Homes funding is structured to run over multiple years, giving households more certainty and time to apply, while supporting the wider rollout of low-carbon heating and renewable energy. The guidance makes clear that all free measures are subject to eligibility checks and a home survey, ensuring installations are suitable, safe and effective for each property. By combining free home improvement grants with cleaner heating and energy generation technologies, the Warm Homes Plan aims to lower household bills, improve living conditions, and modernise the UK housing stock in a way that is fair, practical and focused on long-term affordability for qualifying households.