As energy costs remain high and the UK aims to meet an ambitious net-zero target by 2050, many homeowners are looking for effective ways to improve their home’s energy efficiency, but without shouldering the full financial burden themselves.

The good news is that several different government grants for energy efficiency are available to help UK households make such upgrades, cut energy bills, and reduce carbon emissions. These schemes make it possible to invest in modern insulation, renewable heating systems and other improvements without excessive outlay.

At Adlår Castra UK, we don’t just install market-leading dual heat pumps; we specialise in helping homeowners access UK home energy grants and make the most of the available funding. In this guide, our team explains the main energy efficiency schemes in the UK, who qualifies, and how Adlår can help you navigate the process easily and confidently.

Why Government Grants for Energy Efficiency Matter to Homeowners

The Financial Burden of Energy Efficiency Upgrades

Energy efficiency improvements like insulation, heat pumps, and solar panels are known to deliver long-term savings, but the upfront costs can feel overwhelming.

• Loft insulation: £654 – £1,206
• Cavity wall insulation: £950 – £4,600
• Solid wall insulation: £6,000 – £30,000
• Air source heat pumps: £7,000 – £16,500

By taking advantage of UK home energy grants, homeowners can significantly reduce or sometimes even entirely cover the cost of these improvements, making energy efficiency accessible to a far wider range of households.

Government Incentives to Support Net Zero Goals

The UK government is legally committed to achieving net-zero carbon emissions by 2050, and the nation’s homes are a key part of that challenge. Residential properties contribute around 22% of UK emissions, largely from heating. 

That’s why there are several government-backed UK home energy grants and schemes designed to help homeowners cut their carbon footprint, lower their bills, and make homes more resilient for the future.

Key UK Government Energy Efficiency Schemes

Boiler Upgrade Scheme (BUS)

The Boiler Upgrade Scheme is one of the most impactful government grants for energy efficiency, helping homeowners transition from traditional, fossil fuel–based heating systems to low-carbon technologies such as air source heat pumps.

The grant provides £7,500 towards the cost of installing an air source heat pump or ground source heat pump, or £5,000 towards a biomass boiler. This significant contribution makes this renewable heating technology far more affordable.

To qualify, you must be a homeowner or small landlord in England or Wales, and your property’s Energy Performance Certificate (EPC) must show no outstanding recommendations for loft or cavity wall insulation. Unfortunately, new builds (other than self-builds) are excluded.

Importantly, the application is handled entirely by your installer, and at Adlår we manage the whole process for you, ensuring it is simple and stress-free. The scheme is open until 2028, so there’s still time to benefit, but the sooner you apply, the sooner you can start saving.

Great British Insulation Scheme (GBIS)

Launched in late 2023, the Great British Insulation Scheme supports homeowners in improving insulation affordably. This scheme covers measures such as loft, cavity wall, solid wall and floor insulation, as well as draught-proofing.

Homeowners in Council Tax bands A to D in England (or A to E in Scotland and Wales) and with EPC ratings of D or below are eligible. There is also extra support for low-income households receiving qualifying benefits.

Exact funding amounts vary by property size and type, but typically cover a significant portion of the upgrade cost. This is one of the best insulation grants in the UK, enabling you to improve your home’s thermal performance with little or no upfront cost.

ECO4 Scheme (Energy Company Obligation Phase 4)

The ECO4 Scheme focuses on improving energy efficiency in the UK’s least energy-efficient homes, supporting low-income and vulnerable households with full-scale upgrades.

Eligibility generally includes households earning below approximately £31,000 annually, recipients of certain benefits, and homes rated EPC D–G.

This generous scheme can fund improvements including full insulation upgrades, high-efficiency heating systems like air source heat pumps, solar panels, and even room-in-roof insulation. Many households will see the entire cost of their upgrades covered.

Running until 2026, ECO4 is a vital source of UK home energy grants, especially for those across

Home Upgrade Grant (HUG)

The Home Upgrade Grant was aimed at helping off-gas-grid and low-income households through £700 million in funding. Measures funded included insulation for walls, floors and lofts, air source heat pumps, solar photovoltaic panels, upgraded windows and doors, and secondary heating systems.

HUG’s targeted government grants for energy efficiency were administered by local councils, and funding levels varied by region. Scheduled to end in 2025, the grant is no longer open to new applicants, proving that it is vital to act quickly in order to benefit.

How to Check Eligibility for Energy Efficiency Grants

EPC Ratings Explained

Your Energy Performance Certificate (EPC) assesses your home’s energy efficiency from A (very efficient) to G (very inefficient). Many renewable energy and insulation grants in the UK require an EPC rating of D or lower to qualify.

If you’re unsure of your EPC rating, Adlår can arrange a full home energy assessment for you as part of our service.

Income and Benefit Thresholds

Some UK home energy grants and schemes, such as ECO4, have income or benefit-related criteria. Typically, households earning under £31,000 or receiving certain benefits such as Universal Credit, Pension Credit, or Child Tax Credit will qualify.

Regional Variations

Some grants are managed by local authorities or are only available in certain parts of the UK. That means funding availability and eligibility may vary depending on where you live.

How Adlår Castra UK Helps Homeowners Access Grants

Full-Service Grant Management

At Adlår Castra UK, we specialise in making the most of available government grants for energy efficiency. We handle every step of the grant process on your behalf, from checking your eligibility to completing the application, and ensuring you receive the maximum funding available.

Free Consultations & Surveys

As part of our installation process, we also offer complimentary consultations, home energy surveys, and tailored system designs to help you understand the options that are right for your property. Our services include EPC assessments, heat-loss calculations, and insulation recommendations to help maximise the efficiency of your dual heat pump system.

Fast Installations & Guaranteed Quality

Our in-house installation teams can fit air source heat pumps in as little as 1 to 2 days, keeping disruption to a minimum. We pride ourselves on high-quality workmanship and professional service throughout every stage of your project.

With Adlår managing both the grant application and the installation, you can enjoy a smooth, seamless experience and start reaping the benefits of a more energy-efficient home sooner.

FAQs About Energy Efficiency Schemes in the UK

Q: Are grants taxable?

A: No, these government grants are not considered taxable income for homeowners.

Q: Can landlords apply?

A: Yes. Landlords can access some schemes, particularly the Boiler Upgrade Scheme and Great British Insulation Scheme. Restrictions may apply.

Q: Can multiple grants be combined?

A: In some cases, yes, especially when combining insulation with renewable heating. Adlår can advise on the best funding combinations available.

Q: Do I need to repay the grant?

A: No. These grants are non-repayable as long as you meet eligibility and scheme requirements.

Don’t Miss Out on Available Support

Government-backed energy efficiency schemes in the UK are making home upgrades more affordable than ever. Yet many homeowners miss out simply because they’re not sure where to begin.

By working with the experts at Adlår Castra UK, you can maximise your funding opportunities, take full advantage of UK home energy grants, and have your improvements installed to the highest standards, all with minimal hassle. We’ll carry out a free home survey, guide you through the options, handle all the paperwork, and offer superb service, making improved energy efficiency simple, affordable, and stress-free.

Ready to make your home warmer, greener, and more affordable to run? Get in touch with Adlår today for a free consultation and discover how much you could save with the help of government grants for energy efficiency.