Guidance Optimised Retrofit Programme 3 (Year 4): guidance 2025 to 2026 Explains the type of retrofitting supported and how to submit a bid for funding. Part of: Reduce the carbon footprint of social housing: guidance and forms, Home energy and fuel poverty (Sub-topic) and Social housing management (Sub-topic) First published: 8 May 2025 Last updated: 8 May 2025 Documents Optimised Retrofit Programme 3 (Year 4): guidance 2025 to 2026 Optimised Retrofit Programme 3 (Year 4): guidance 2025 to 2026 , HTML HTML