Wall insulation grants in 2026 look very different from what was available twelve months ago, and homeowners who are still searching for the Great British Insulation Scheme are going to find nothing but a closed door. GBIS ended on 31 March 2026. What has replaced it is a combination of a still-running ECO4 scheme, a new locally delivered grant programme, and a forthcoming loan fund that together form the Warm Homes Plan. Understanding which route applies to your situation right now is the practical starting point for anyone who wants funded wall insulation this year.
The good news is that wall insulation remains one of the most supported measures in UK energy efficiency policy. Whether your home has cavity walls, solid walls, or something in between, there is likely a funded route available to you, provided your property and household meet the relevant criteria. The challenge is navigating a landscape that shifted significantly in early 2026.
What Closed and When
The Great British Insulation Scheme provided a single free insulation measure to households in council tax bands A to D with an EPC rating of D or below. It was funded by energy suppliers through their supplier obligations and ran alongside ECO4 until its planned closure on 31 March 2026. Wall insulation, particularly cavity wall fill, was one of its most commonly delivered measures.
The scheme did not fail. It ended as planned, with the government taking a deliberate decision to redirect funding toward the broader and more ambitious Warm Homes Plan. The supplier obligation model, under which energy companies funded improvements as part of their regulatory requirements, has been replaced by direct government grant funding through the new programme. That transition is significant because it changes how you access support and who delivers it.
What Wall Insulation Grants Is Still Available in 2026
ECO4 continues to run until 31 December 2026. It remains the primary free route for low income and fuel poor households and covers wall insulation, including both cavity fill and solid wall insulation, as eligible measures. To access wall insulation grants through ECO4 your household generally needs to receive a qualifying benefit such as tUniversal Credit, Pension Credit, Child Tax Credit, or Income Support, and your property needs to have an EPC rating of D or below.
ECO4 is accessed through approved installers. The process starts with an eligibility check, which most registered installers carry out free of charge. If your household qualifies, the installer manages the survey, specification, and installation, with costs covered by the scheme. Because December 2026 is a hard deadline, acting before summer is advisable. Installer slots fill up as the deadline approaches and waiting until autumn means competing with a much larger pool of applicants for diminishing capacity.
The Warm Homes Local Grant is the other active route in 2026. This is the successor to the locally delivered elements of GBIS and it is administered by local councils rather than by energy suppliers. The government has distributed funding to local authorities, who are running their own programmes throughout 2026 targeting households that are low income, in less energy efficient homes, or in areas of high fuel poverty. Eligibility criteria vary by council but wall insulation is a core eligible measure across all areas.
To access the Warm Homes Local Grant, contact your local council directly and ask about their energy efficiency or home upgrade programme. Many councils have a dedicated webpage, though not all have advertised the scheme prominently. Some councils are running area based schemes where entire streets are upgraded together, which reduces costs significantly and makes it worth asking even if you have been told previously that nothing is available in your area.
What Is Coming Through the Warm Homes Plan
The Warm Homes Plan is the government’s overarching framework for home energy upgrades through to 2030. The £15 billion programme targets five million home upgrades and positions wall insulation as a foundational measure that must be addressed before other clean energy technologies like heat pumps and solar panels can perform efficiently.
For households that do not qualify for free grant support, the Warm Homes Fund will offer low or zero interest loans for energy efficiency improvements including wall insulation. The details of the loan scheme, including interest rates, loan terms, and the application process, are expected to be confirmed later in 2026. This will represent a meaningful route for owner occupiers and landlords who want to upgrade but whose income or benefit status places them outside the current grant criteria.
The landlord angle is particularly worth noting. From 1 October 2030, all privately rented homes in England and Wales must reach EPC C. For the roughly half of the private rented sector that currently sits below that threshold, wall insulation is one of the primary compliance routes. Landlords who act now while ECO4 is still running and while the Warm Homes Local Grant is being distributed have access to funding that may not exist in the same form in 2028 or 2029.
How to Check Your Eligibility Right Now
The fastest route is to contact a registered ECO4 installer and ask for an eligibility check. This costs nothing and takes a short conversation. They will confirm your benefit status, check your EPC rating, and assess your wall construction type before advising on the most appropriate measure and funding route.
If ECO4 does not apply to your household, go directly to your local council and ask about the Warm Homes Local Grant in your area. If neither route is currently open to you, monitor the Warm Homes Fund developments through the government website and consider getting a survey and quote from a reputable installer so you are ready to act as soon as the loan scheme opens.
Wall insulation grants in 2026 still exist. They have simply moved, and knowing where to look makes the difference between a funded upgrade and an unfunded one.