Energy grants available in London
London, with a population of 8.8 million and approximately 3.6 million homes, has significant potential for energy efficiency improvements. An estimated 11.2% of London households are living in fuel poverty — spending a disproportionate amount of their income on energy bills simply to keep warm.
The good news is that multiple government-backed energy schemes are available to London residents right now. Whether you own your home or rent, whether you live in a Victorian terrace in Westminster or a modern flat in Barking & Dagenham, there are grants that could fund thousands of pounds worth of free improvements.
Victorian and Edwardian terraces, post-war council estates, and converted flats dominate London's housing landscape. Many properties in inner London boroughs have solid walls, single glazing, and poor insulation — making them prime candidates for energy efficiency upgrades.
Act now: The ECO4 scheme ends in December 2026, and funding is allocated first-come, first-served. London residents should check their eligibility today to avoid missing out on free energy upgrades worth up to £10,000+.
ECO4 scheme in London
The ECO4 (Energy Company Obligation 4) is the largest energy efficiency scheme available to London residents. It requires major energy suppliers to fund free improvements in eligible households, including:
- Loft insulation — saving up to £590 per year
- Cavity wall insulation — saving up to £395 per year
- Solid wall insulation — saving up to £640 per year
- Boiler replacement — saving up to £400 per year
- First-time central heating — saving £900+ per year
- Solar PV panels — saving up to £1,100 per year
- Air source heat pumps — saving £300+ per year
- Underfloor insulation — saving up to £230 per year
To qualify for ECO4 in London, you'll typically need to receive a qualifying benefit such as Universal Credit, Pension Credit, Income-Based JSA, Income-Related ESA, Income Support, Child Tax Credit, Working Tax Credit, or Housing Benefit. Your home should also have an EPC rating of D, E, F, or G.
LA Flex eligibility in London
Even if you don't receive qualifying benefits, Greater London Authority (GLA) can refer you through the Local Authority Flex (LA Flex) route. This pathway is designed for households that are fuel-poor, on low incomes, or have health conditions made worse by living in a cold home. Contact Greater London Authority (GLA) directly or enter your postcode above to check your eligibility.
Solar panels in London
London receives approximately 1,500 hours of sunshine per year. South-facing roofs in London can generate 3,500-4,200 kWh annually from a typical 4kW solar panel system, saving homeowners £800-1,100 per year on electricity bills.
Through the ECO4 scheme, eligible London households can receive free solar panels as part of a whole-house energy upgrade. Solar PV is typically installed alongside insulation measures to maximise the energy performance improvement of your home.
For homeowners who don't qualify for ECO4, solar panel installation in London typically costs £5,000-£8,000 for a 4kW system. With current electricity prices, the payback period is 6-8 years, after which you'll enjoy decades of free electricity generation. The Smart Export Guarantee (SEG) also pays you for surplus energy exported to the grid.
| System Size | Typical Cost | Annual Generation | Annual Savings |
|---|---|---|---|
| 3kW (8 panels) | £4,000-£5,500 | 2,500-3,000 kWh | £600-750 |
| 4kW (10 panels) | £5,000-£7,000 | 3,200-3,800 kWh | £800-950 |
| 5kW (13 panels) | £6,500-£8,500 | 4,000-4,800 kWh | £1,000-1,200 |
| 6kW+ (15+ panels) | £7,500-£10,000 | 4,800-5,700 kWh | £1,200-1,400 |
Heat pumps in London
Air source heat pumps are increasingly popular in London, particularly in areas where the gas grid is being decommissioned. The Boiler Upgrade Scheme offers £7,500 towards installation costs, and many London properties are suitable for retrofit.
The Boiler Upgrade Scheme (BUS) offers £7,500 towards the cost of an air source heat pump, reducing the typical installation cost from £10,000-14,000 to just £2,500-6,500 out of pocket. For London homeowners looking to replace an ageing gas or oil boiler, this is one of the most generous grants available.
Heat pumps work by extracting warmth from the outside air — even in cold weather — and using it to heat your home and hot water. Modern air source heat pumps operate efficiently down to -15°C, making them perfectly suited to London's climate. They produce 3-4 units of heat for every 1 unit of electricity consumed, making them significantly more efficient than traditional gas boilers.
Is my London home suitable for a heat pump?
Most London properties can accommodate an air source heat pump, provided there is:
- Outdoor space for the external unit (roughly 1m × 1m)
- Good insulation — heat pumps work best in well-insulated homes (ECO4 can help with this)
- Adequate radiator sizing — larger radiators or underfloor heating may be needed
- A suitable electrical supply — some older London properties may need an upgrade
Combine for maximum savings: The most cost-effective approach is to insulate your London home first (free through ECO4 if eligible), then install a heat pump with the £7,500 BUS grant. This whole-house approach can reduce your energy bills by 60-70%.
Insulation grants in London
Many London homes, particularly Victorian terraces in areas like Islington, Hackney, and Brixton, have solid walls that lose up to 45% of heat. External and internal wall insulation under ECO4 can dramatically reduce energy bills.
Insulation is the single most cost-effective energy efficiency measure for most London homes. It reduces heat loss, lowers energy bills, and makes your home more comfortable year-round. Two main schemes fund free or subsidised insulation:
ECO4 insulation (free for eligible households)
If you receive qualifying benefits and your home has an EPC rating of D-G, you can receive completely free insulation through the ECO4 scheme. This covers loft insulation, cavity wall insulation, solid wall insulation (internal and external), underfloor insulation, flat roof insulation, and room-in-roof insulation.
Great British Insulation Scheme
The Great British Insulation Scheme (GBIS) provides free or subsidised insulation based on your council tax band and property type, rather than benefits. Many London homeowners who don't qualify for ECO4 can still access insulation funding through GBIS.
| Insulation Type | Annual Savings | Installation Time | Disruption Level |
|---|---|---|---|
| Loft insulation | £590 | 2-4 hours | Minimal |
| Cavity wall insulation | £395 | 1-2 days | Low |
| Internal wall insulation | £430 | 1-2 weeks | Medium |
| External wall insulation | £640 | 2-3 weeks | Low (external) |
| Underfloor insulation | £230 | 1-2 days | Low-Medium |
London council energy support
The Mayor of London's Warmer Homes programme provides additional support for fuel-poor households. Several London boroughs including Hackney, Tower Hamlets, and Lewisham run their own LA Flex schemes.
To access local energy support in London, you can:
- Visit Greater London Authority (GLA) website and search for energy grants
- Call Greater London Authority (GLA)'s housing or environmental health team
- Ask your GP for a referral if you have a health condition affected by cold housing
- Contact Citizens Advice London for free, independent guidance
- Enter your postcode above to check eligibility for all available schemes
How to apply for energy grants in London
The application process for energy grants in London is straightforward:
- Check eligibility online — Enter your E postcode in our checker above. We'll instantly tell you which schemes you may qualify for based on your postcode area, property type, and circumstances.
- Get matched with local installers — We connect you with ECO4-approved, TrustMark-registered installers operating across London and surrounding areas.
- Free home survey — A qualified surveyor visits your London property to assess which measures will be most effective. This typically takes 30-60 minutes.
- Approval — The survey results are submitted to the funding energy supplier for approval. This takes 1-3 weeks.
- Installation — Certified installers complete the work at a time that suits you. Depending on the measures, this takes anywhere from a few hours to a couple of weeks.
- Quality assurance — An independent inspection ensures all work meets required standards and building regulations.
How long does the process take in London?
From initial enquiry to completed installation, most London residents can expect the process to take 4-8 weeks. London has active ECO4 installer networks, which helps keep waiting times manageable. However, as the December 2026 deadline approaches, demand is increasing — so applying sooner rather than later is advisable.
Energy efficiency statistics for London
Understanding London's energy landscape helps illustrate why these grants matter:
| Metric | London | UK Average |
|---|---|---|
| Fuel poverty rate | 11.2% | 13.4% |
| Average EPC rating | D | D |
| Total homes | 3.6 million | 29 million |
| Homes needing upgrades (EPC D-G) | ~60-70% | ~55% |
| Average annual energy bill | £2,100-2,500 | £2,200 |
Areas covered in London
Our ECO4 installer network covers all areas of London and surrounding districts, including:
Westminster, Camden, Tower Hamlets, Hackney, Lambeth, Southwark, Lewisham, Greenwich, Newham, Barking & Dagenham
Whether you're in the city centre or the outskirts, if your postcode falls within the E, EC, N, NW, SE, SW, W, WC range, you can check your eligibility using the postcode checker above. We work with multiple approved installers across the region to ensure comprehensive coverage and competitive timelines.
Protecting yourself from energy grant scams in London
Unfortunately, the availability of free energy grants has attracted some unscrupulous operators in London and across the UK. Protect yourself by following these guidelines:
- Never pay upfront — genuine ECO4 measures are 100% free for eligible households
- Check installer credentials — all installers should be TrustMark registered and PAS certified
- Get everything in writing — ensure you have documentation of all proposed works and funding confirmation
- Be wary of cold callers — while some legitimate companies do outreach, be cautious of high-pressure sales tactics
- Verify with Greater London Authority (GLA) — your local council can confirm whether an installer is operating legitimately in your area