RS2: The Business Case for Action: A £140 Billion Potential

The Numbers Behind the Argument 

The headline figure is £140 billion in potential benefits from upgrading Britain's housing stock to EPC C. That sounds abstract, but the presenters broke it down into things that actually matter to housing providers and their residents: 

• £415 a year in average bill savings per household 

• £600 million a year in NHS savings from fewer cold-home related illnesses 

• 560,000 fewer adults and children developing mental health conditions from living in cold, damp homes 

• £3 for every £1 the government invests, in terms of GDP uplift 

• 30% reduction in NHS winter peak demand 

• £4 billion in avoided electricity grid investment from lower peak demand 

The near-term case is just as compelling. Rebecca explained that £16 billion of government funding could unlock a further £49 billion in private finance -  a combined £65 billion that could deliver £49 billion in economic and social benefits by 2030 alone. As she put it:

"It's not just an energy issue, but everyone's responsibility." 

There are currently around 16 million homes in Great Britain below EPC C. Upgrading them, she said, is "a once-in-a-generation opportunity to hugely improve lives and reduce pressure on public services." 

Why Social Housing Is Where This Lands First 

The presenters were clear that social housing is the best place to start and to scale. Three reasons: 

1. The people who need it most live there. Cold and poor-quality housing disproportionately affects social housing residents. Energy efficiency improvements cut bills, reduce damp and mould, and ease the respiratory and mental health problems that follow tenants into A&E. As Rebecca said, reframing this around "warmth, affordability, and resilience resonates far more with tenants than carbon ever will." 

2. Social landlords can do this systematically. Unlike the private rented sector or owner-occupiers, social housing providers have long-term ownership of their stock, data on their properties, and existing trusted relationships with residents. That makes portfolio-wide upgrades genuinely feasible. 

3. The Warm Homes Plan is moving in the right direction. Sharon called it "very encouraging" because it recognises that warm homes delivery isn't one isolated scheme,  it's about stitching together finance, delivery, funding and local capability. But, as she was quick to add:

"Encouragement alone doesn't deliver outcomes." 

Why Delivery Is Still the Real Problem 

Despite strong policy intent, both presenters were frank about what gets in the way: 

• Stop-start funding cycles undermine supply chain confidence. The slide showing ECO measure installation rates over time illustrated how every policy change causes a dip in delivery,  installers can't invest in training and workforce if they don't know what the next scheme will look like. 

• Confusing resident journeys. Disjointed grants, finance and delivery schemes create confusion and mistrust. Sharon was direct: "It's so easy to manage that better and to leave them in a better place at the end." Residents need simplicity, not jargon. 

• Match-funding pressures on RSLs. Co-funding requirements are directly competing with other investments housing associations need to make. The Social Housing Fund's match-funding requirements strain balance sheets and limit the pace of roll-out. 

• Uncertainty about what comes next. Post-2027, the Social Housing Fund and Warm Homes Local Grant will be consolidated into a single low-income scheme, but the details on eligibility, allocation and design are still not decided. As Rebecca noted, the market is being asked to invest without knowing the rules. One provider in the room described shifting from a binary plan to a 20-year scenario-based portfolio model precisely because of this uncertainty. 

Debbie's Story -  What This Actually Means 

Sharon shared a case study from Banbury, Oxfordshire, that AgilityEco has used widely. Debbie and her husband, who had a heart condition, COPD and lung cancer,  were living in a Band G home with no central heating, plug-in electric heaters only, and mould on the walls and ceilings. They were paying around £50 a week on energy. 

The entry point wasn't a retrofit scheme,  it was a LEAP (Local Energy Advice Partnership) visit. That conversation identified the potential for improvement, built trust, and led to a two-day installation of solar PV, loft insulation, ventilation fans and an air source heat pump. Their bill dropped to £11 a week. The property went from Band G to Band B. 

Debbie said: "It's fabulous! It has so benefitted myself and my husband – we're actually looking forward to winter this year. It's a real relief to know there's going to be heat there." 

Sharon's point was clear: "If you get it right, it's amazing for that household. If you get it wrong, it's a nightmare — because it's a ripple effect on others close by." 

AgilityEco's 2024–25 impact figures: £18.2 million in health and care outcomes; £19.2 million in annual bill savings; £143 million in total lifetime bill savings -  an average of £3,149 per household. 

What Actually Works in Practice 

Sharon was specific about what makes retrofit programmes succeed: 

• Design the scheme properly upfront. Engage residents at the beginning, keep them in their homes where possible, and work around their lives - school holidays, shift patterns, caring responsibilities. "It's really important to get it right." 

• Do a proper handover. This often gets forgotten. Make sure residents can actually operate the equipment you've installed, know which energy tariff to be on, and understand how to manage their home. Without this, the benefits don't land. 

• Simplicity and trust all the way through. AgilityEco appoints a named resident liaison on every project and runs town halls for questions. The goal is to turn residents into advocates  "if you're working street by street, you get that halo effect." 

• Place-based delivery works. Working neighbourhood by neighbourhood means you have housing archetype similarity, density, and the ability to use local contractors. AgilityEco's Cambridgeshire example saw over 80% local delivery partners,  people who understand the area and are already trusted. They recently completed a street-by-street programme with Paradigm Housing: air source heat pumps, cavity wall insulation and solar. 

• Design explicitly for vulnerable tenants. Sharon's team works with households facing mental health issues, communication barriers, anxiety and language difficulties. "It's so easy to manage that better and to leave them in a better place." The soft entry point of an advice visit, through LEAP, was what opened the door for Debbie. Retrofit conversations often start there. 

Practical Actions for Housing Providers 

The presenters summarised five things RSLs can do now: 

1. Manage retrofit as a long-term portfolio programme -  not a sequence of separate schemes. Build long-term partnerships with delivery specialists and create a clear strategy aligned to your asset management plan. 

2. Create one clear resident journey -  single point of contact, plain language, local advocates where possible. Don't expect residents to navigate the complexity you're navigating. 

3. Aggregate demand  across homes and neighbourhoods, to stabilise delivery, improve quality and make it easier for supply chains to invest in workforce. 

4. Prioritise vulnerable tenants explicitly - design programmes that give them dedicated support before, during and after installation, not just standard engagement. 

5. Use social housing as an anchor market - to attract delivery partners, build skills locally, and bring in private investment alongside public funding. Rebecca mentioned active work happening now with social housing providers and investors to blend funding sources and share the financial benefits of optimised energy assets with tenants and providers alike. 

 Key Takeaways 

1. The business case for retrofit in social housing is overwhelming, but the benefits only materialise if delivery is right. The £140bn prize is real, but stop-start programmes, poor resident engagement and funding uncertainty have repeatedly prevented it from being realised. The Warm Homes Plan is the best policy framework seen yet, but it still needs simplification and stability to work at scale. 

2. Social housing is uniquely placed to lead this, because of ownership, data, relationships and scale. The ability to plan across a portfolio, engage residents early through trusted advice services, and work neighbourhood by neighbourhood gives housing providers capabilities that no other part of the housing market has. That's a competitive advantage worth using. 

3. The soft entry point matters enormously. Debbie's story is a reminder that the door to retrofit is often opened through a conversation about bills and comfort, not by leading with carbon or compliance. Advice services, tenant liaison and trusted relationships are not soft extras,  they are what makes the hard stuff possible. 

Reflection Questions for Housing Providers 

1. Does your current retrofit strategy treat this as a long-term portfolio programme, or is it still organised around individual funding schemes? If it's the latter, what would it take to shift to a 20-year plan.. and what data do you need to do that? 

2. How confident are you that your most vulnerable residents, those with complex health needs, communication barriers or severe fuel poverty, are genuinely being reached and supported through retrofit, rather than falling through the gaps between schemes? 

3. Are you actively exploring how private finance could sit alongside Warm Homes Plan funding in your investment strategy? If not, what would need to change, in terms of partnerships, data or internal capability,  for that to become possible?