Housing Association Solar Grants & Funding 2026

Funding solar panels for housing associations in 2026

The single biggest shift in social-housing decarbonisation is that the money is finally there. For years the question for an asset or decarbonisation lead was whether solar could be funded across a stock at all; in 2026 it is which combination of grant routes you stack, and how you sequence delivery to defray it on time. Solar panels for housing associations are one of the most cost-effective measures in the retrofit toolkit, and the funding landscape has never been stronger. This guide sets out the main 2026 routes, who qualifies, and how the pieces fit into a single funding stack per programme.

All values below are drawn from current scheme guidance and are subject to change as bid windows and government announcements move. Treat the modelling against your own stock as illustrative.

Warm Homes: Social Housing Fund (Wave 3)

This is the flagship route and the one most programmes are built around. The Warm Homes: Social Housing Fund (Wave 3) is the successor to the Social Housing Decarbonisation Fund (SHDF), operated by DESNZ, and it targets existing social homes in England below EPC band C (bands D to G). The Wave 3 application window closed on 25 November 2024.

• Who qualifies: registered providers of social housing, local authorities and combined authorities in England, upgrading existing social homes at EPC D-G.
• Value: £1.29bn allocated in the Autumn Budget 2024, to be delivered from 2025 until 2028, aimed at upgrading a large tranche of existing social homes. This is the Wave 3 allocation, separate from the plan-wide Warm Homes Plan figure, so check the scheme page on gov.uk for the current position.
• Routes: Wave 3 ran through a Challenge Fund route and Strategic Partnerships for delivery at scale. The Greater Manchester and West Midlands combined authorities and their constituent councils were not eligible for the national Wave 3, as they received devolved allocations, so housing associations with stock there had to split mixed-stock projects and seek funding from the appropriate stream.
• Key dates: the application window closed on 25 November 2024, and the list of successful landlords was published on 11 March 2025. Delivery runs to September 2028, and all grant must be spent by 31 March 2028. Check the scheme page on gov.uk for the current position before you plan a programme around it.

Two conditions are non-negotiable: delivery must be PAS 2035-compliant and must follow a fabric-first approach. The application window has closed, but the same discipline applies to delivery: archetype modelling, a credible delivery plan and a defrayal schedule, not just an aspiration. You can read the official scheme detail on the gov.uk page for the Warm Homes: Social Housing Fund.

The Warm Homes Plan: the wider programme

Sitting above the Social Housing Fund is the Warm Homes Plan, the government’s major multi-year framework for home decarbonisation. It covers social-housing decarbonisation, low-income household upgrades, insulation grants, and low or zero-interest loans for solar, batteries and heat pumps. The government re-committed £13.2bn to it at the June 2025 Spending Review, across 2025-26 to 2029-30; that is the plan-wide figure, not a Social Housing Fund line item.

For social landlords, the Plan matters in two ways. First, it is the umbrella that the Social Housing Fund draws from, so the capital behind a funded programme is part of a far larger, multi-year commitment rather than a one-off pot. Second, it includes retrofit-skills funding to build supply-chain capacity, which addresses one of the sector’s real delivery constraints. Most social landlords access the Plan primarily through the Warm Homes: Social Housing Fund strand, but the Warm Homes Plan page is worth reading for the strategic context your board will want.

ECO4 and ECO4 Flex: topping up the lowest-rated homes

The Energy Company Obligation (ECO4), and its ECO4 Flex route, funds whole-house retrofit for low-income and fuel-poor households; in social housing, homes rated EPC E to G can get insulation or first-time heating. It is administered by Ofgem and funded by an obligation on larger energy suppliers. ECO4 runs to 31 December 2026, so check that any work you build into a programme can complete before then.

For a social landlord, ECO is most useful as a top-up on the lowest-rated social homes, blended with Warm Homes funding rather than used alone. ECO4 Flex is particularly valuable because it lets local authorities refer fuel-poor or vulnerable households who fall outside standard means-tested criteria, widening eligibility across social stock. As with the main fund, the scheme needs PAS 2030/2035 and TrustMark-registered installers.

Smart Export Guarantee: ongoing income, not capital

The Smart Export Guarantee (SEG) is not a grant but an ongoing income stream that can subsidise a programme. It is mandatory for licensed suppliers with 150,000 or more customers and applies to MCS-certified installations up to 5 MW. Tariffs vary by supplier; the better fixed rates open to anyone are around 12 to 13p per kWh (October 2026, indicative), while small suppliers pay about 3 to 6p.

The crucial point is the benefit model. On dwelling-level installs, who receives the SEG income must be agreed before installation. The most tenant-friendly arrangement lets residents self-consume the generation (the bill saving) while the landlord, or a split-benefit tariff partner such as Octopus Tenant Power, registers the array and takes only the surplus export. That surplus can then be recycled into the wider programme. Communal and landlord-supply arrays on blocks and schemes are usually registered by the landlord directly. The Smart Export Guarantee guidance from Ofgem sets out the supplier obligation.

Social and Affordable Homes Programme: designed-in solar

For new-build and regeneration strands, the Social and Affordable Homes Programme 2026 to 2036, the successor to the Affordable Homes Programme with £39bn over ten years, provides grant funding to registered providers and local authorities building new affordable and social homes in England. New homes are built to the Future Homes Standard, where rooftop solar is effectively standard, and designed-in PV costs substantially less than retrofitting it later. Per-home grant rates vary by tenure and region, and the programme is administered by Homes England outside London and the Greater London Authority in London. It pairs naturally with air-source heat pumps and a fabric-first envelope.

Building the funding stack

No single route funds a stock-wide programme on its own. The practical approach is to stack them: a Warm Homes: Social Housing Fund allocation as the capital backbone for existing stock where a landlord holds one, ECO4 and ECO4 Flex to top up the lowest-rated homes until ECO4 ends on 31 December 2026, the Social and Affordable Homes Programme 2026 to 2036 for designed-in solar on new build and regeneration, and SEG as ongoing income to recycle into the programme. The contribution you carry after grant is the number your business plan should turn on, not the gross install cost.

What funders consistently want to see is a well-evidenced PAS 2035 programme: archetype modelling, the SAP/EPC uplift per house type, a delivery plan sequenced to grant-defrayal deadlines, and a clear benefit model showing residents feel the saving. Wave 3 applications have closed, but the same evidence base is what a board will expect behind any programme, and it puts a landlord in a stronger position for whichever funding route it pursues next.

See which schemes apply to your stock on the grants and funding page, work the cost numbers on the cost guide, model the funded position with the savings calculator, or read about whole-portfolio delivery under a stock-wide decarbonisation programme. If you have a question about funding for your own portfolio, send an enquiry and we reply by email.