Retrofit Accelerator - Workplaces
About the programme
Buildings are responsible for about 40 per cent of the UK’s total carbon footprint. We need urgent action to meet zero carbon emission targets.
Retrofit Accelerator - Workplaces (also referred to as RE:FIT) was established in 2009 as an award-winning programme part of the Mayor's £34 million Energy for Londoners wider programme.
Current framework: RE:FIT5
The Mayor of London is launching RE:FIT5 (2025–2029) in January 2026, an improved national framework designed to help public sector organisations decarbonise their buildings efficiently and affordably.
RE:FIT5 builds on over a decade of success, offering a trusted route to guaranteed energy and carbon savings. This performance-based contracting framework helps public sector organisations to deliver decarbonisation and retrofit projects with guaranteed energy and carbon savings. It supports the aggregation of projects to scale up the impact and build long-term partnerships with service providers.
The difference we have made so far
So far, the Accelerator has helped a range of organisations including London boroughs, NHS bodies, central government departments, schools and other educational establishments, and cultural and heritage organisations to implement retrofit projects.
Explore the impact in action through a range of case studies and project achievements which highlight how these organisations have delivered meaningful retrofit outcomes.
Retrofit Accelerator – Workplaces has already delivered over £260m worth of investment projects to save energy.
What Retrofit Accelerator has achieved.
Spotlight on
Joint public sector retrofit procurement
London’s workplaces must be made zero carbon through better designed and more energy efficient buildings.
Retrofit Accelerator - Workplaces offered support to bring together multiple retrofit projects to simplify procurement and aid access to finance and funding.
About past RE:FIT
So far, Retrofit Accelerator – Workplaces has offered public sector organisations fully funded support through:
- the programme delivery unit, an expert team that provided free end-to-end support needed to get projects up, running and successfully implemented
- the easy to use RE:FIT framework of energy service companies, which saved time and resources for organisations that were procuring retrofit services and works which - as an energy performance contracting framework - guaranteed energy and cost savings.
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The Mayor’s Retrofit Accelerator Workplaces programme was co-funded by the ERDF. This video, showcasing a Local Authority and NHS example, demonstrates how the programme supported public sector organisations in London to save carbon, energy and money moving towards a net zero London by 2030.
Below you can explore information from previous rounds of the programme (up to 2026), including how it worked and the impact it had on making London a more sustainable city for all.
Retrofit Accelerator - Workplaces (formerly RE:FIT) was developed to help make London's non-domestic public buildings and assets more energy efficient, lowering emissions and saving public money on energy spending.
Find out the benefits of using the Mayor's Retrofit Accelerator programme for workplaces.
Discover how our framework of suppliers provides guaranteed energy and cost savings.
Find detailed information about energy savings, costs and how the project was operated on our FAQs page.
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