Home Energy Improvements UK – Complete Guide to Saving Energy
Home Energy Improvements help UK homeowners reduce energy bills, improve EPC ratings, and create more comfortable, efficient properties through insulation, renewable energy, and heating upgrades. LAMTANS Engineering provides expert retrofit guidance from our Manchester base, helping households across the UK plan and complete energy efficiency improvements.
Why Home Energy Improvements Matter Now
Energy costs, changing regulations, and the growing focus on energy efficiency are encouraging UK homeowners to improve the performance of their properties. Upgrading insulation, heating systems, and renewable technologies can help reduce heat loss, lower energy bills, improve EPC ratings, and create more comfortable homes throughout the year.
Government initiatives such as the Warm Homes Plan and ECO4 Scheme are supporting eligible households with energy efficiency improvements — with costs as low as £0 for qualifying homeowners. As a Manchester-based retrofit specialist delivering projects across the UK, LAMTANS Engineering helps homeowners identify the most effective improvements for their property, from insulation upgrades to renewable energy solutions.
This complete guide covers:
- Home insulation improvements – loft, cavity wall, external wall, internal wall, underfloor, solid floor, and park home insulation
- Renewable energy solutions – solar panels, battery storage, and air source heat pumps
- Government support and grants – ECO4, Warm Homes Plan, and Boiler Upgrade Scheme (BUS)
- Costs, savings, and payback periods – understanding the financial benefits of each upgrade
- Choosing a trusted retrofit installer – what accreditations, standards, and experience to look for
02 — What Are They?
What Are Home Energy Improvements?
Home energy improvements are upgrades that make a property more energy efficient by reducing heat loss, improving heating performance, and lowering reliance on traditional energy sources. These measures are often part of a wider home retrofit approach designed to improve comfort, reduce energy bills, and increase EPC ratings.
Home energy improvements fall into three main categories. When combined correctly, they can significantly reduce energy waste, improve household comfort, and help homeowners lower long-term energy costs.
Reduce heat escaping through the building fabric — keeping homes warmer in winter and cooler in summer.
- Loft insulation
- Cavity wall insulation
- External wall insulation
- Internal wall insulation
- Underfloor & solid floor insulation
- Park home insulation
Replace inefficient systems or improve how energy is controlled and used throughout the home.
- Air source heat pumps
- High-efficiency heating systems
- Smart heating controls
- Improved ventilation solutions
Generate or store cleaner energy and reduce dependence on the electricity grid for long-term savings.
- Solar panels (PV)
- Battery storage
- Low-carbon heating technologies
Why Insulation Is the First Step in Home Energy Improvements
Before investing in renewable technologies such as solar panels or heat pumps, improving your home's insulation is often the most effective first step.
Insulation reduces heat loss through your roof, walls, and floors, helping your home retain energy more efficiently. A heat pump or renewable energy system will perform better when installed in a property that already has good thermal performance.
Just as a coat helps your body retain heat, insulation helps your property keep warmth inside and reduces the energy needed to maintain a comfortable temperature. A fabric-first approach — improving insulation before upgrading heating systems — maximises comfort, improves EPC ratings, and achieves better long-term energy savings.
Government-supported schemes such as ECO4 and the Warm Homes Plan may consider existing insulation levels when assessing eligibility for certain energy efficiency measures. Improving insulation first can open the door to broader retrofit funding.
04 — Insulation Types
Which Type of Home Insulation Do You Need?
Choosing the right insulation depends on your property type, age, construction method, and existing energy performance. Each option targets a different area where heat loss occurs — from the roof down to the floor.
One of the most effective ways to reduce heat loss — a significant amount of warmth escapes through an uninsulated or poorly insulated roof.
- Typical cost£400 – £1,200
- Annual saving£300 – £400
- PaybackUnder 2 years
- GrantYes — ECO4 & WHP
Homes built between 1920 and 1990 typically have a cavity wall. Filling this gap reduces heat loss by up to 35% and is one of the fastest-payback measures available.
- Typical cost£400 – £1,500
- Annual saving£200 – £300
- PaybackUnder 2 years
- GrantYes — ECO4 & WHP
For solid wall homes (typically pre-1920), insulation boards are fixed to the exterior and finished with render — the most effective solution for older properties.
- Typical cost£8,000 – £30,000
- Annual saving£400 – £600
- Payback15–20 years
- GrantPartial — ECO4 & WHP
For solid wall homes where external insulation is not possible — listed buildings, conservation areas, or where original brickwork is to be preserved.
- Typical cost£2,000 – £10,000
- Annual saving£300 – £500
- Payback5–10 years
- GrantPartial — ECO4 & WHP
Homes with suspended timber floors (common in Victorian and Edwardian properties) can lose significant heat and suffer cold draughts without proper floor insulation.
- Typical cost£500 – £3,000
- Annual saving£100 – £200
- Payback3–5 years
- GrantYes — ECO4 & WHP
For concrete ground floors (common in modern homes and extensions), insulation is installed on top of the existing concrete slab to improve thermal performance.
- Typical cost£1,500 – £10,000
- Annual saving£100 – £200
- Payback10–15 years
- GrantPartial — ECO4 & WHP
Park homes and mobile homes are often poorly insulated. Dedicated park home insulation — roof, walls, and floor — can dramatically reduce heat loss and energy bills.
- Typical cost£4,000 – £8,000
- Annual saving£300 – £600
- Payback5–10 years
- GrantYes — ECO4
Renewable Energy Solutions for UK Homes
Renewable energy technologies help homeowners reduce reliance on traditional energy sources, lower long-term energy costs, and improve the sustainability of their properties. The most common solutions for UK homes include solar panels, battery storage, and air source heat pumps — best suited to properties that already have good insulation in place.
Solar panels (photovoltaic / PV) convert sunlight into electricity. Any electricity you do not use can be stored in a battery for the evening — or exported to the grid and paid via the Smart Export Guarantee (SEG).
- Homes with suitable roof orientation (south to south-west facing)
- Homeowners wanting to generate renewable electricity
- Properties looking to reduce grid electricity reliance
- Typical cost (4kW)£5,000 – £8,000
- Annual saving£465 – £585
- Payback period7–10 years
- VAT0% (zero rated)
- GrantPartial — Warm Homes Plan (TBC)
Battery storage allows you to store excess solar electricity generated during the day for use in the evening when solar generation stops. Without a battery, typical homes use 30–50% of their solar electricity. With a battery, this rises to 70–90%.
- Homes already fitted with solar panels
- Households using more electricity in evenings
- Homeowners wanting maximum energy self-sufficiency
- Typical cost£2,500 – £10,000
- Annual saving£300 – £600 additional
- Payback period5–8 years
- VAT0% (zero rated)
- GrantNo — but 0% VAT applies
An air source heat pump extracts heat from the outside air — even at temperatures as low as -15°C — and uses it to warm your home and hot water. Running on electricity, it is three to four times more efficient than a gas boiler.
- Properties requiring low-carbon heating
- Homes with suitable insulation levels in place
- Households replacing oil, LPG, or electric heating
- Full cost£7,000 – £13,000
- BUS grant£7,500 (£9,000 off-gas)
- Your cost after grantOften £0 – £5,500
- Annual saving£300 – £600
- PaybackVaries by property
What Government Grants Are Available for Home Energy Improvements?
Government support can help eligible homeowners reduce the cost of energy efficiency upgrades significantly — in many cases to £0. Available schemes change over time and depend on household circumstances, property type, and location. The main programmes currently supporting UK home energy improvements are outlined below.
You may qualify if you receive benefits such as Universal Credit, Pension Credit, Income Support, JSA, ESA, Working Tax Credit, Child Tax Credit, or Housing Benefit. You may also qualify based on a low EPC rating (D, E, F, or G) — even without receiving benefits.
£0 for eligible households. Larger energy suppliers are required by law to fund these improvements for qualifying homes.
- Loft insulation
- Cavity wall insulation
- External and internal wall insulation
- Underfloor and solid floor insulation
- Park home insulation
- First-time central heating
- Heating controls
- Solar panels and heat pumps (in some cases)
Expected to be broader than ECO4 — more households will be eligible. The full eligibility criteria are still being finalised by DESNZ. We are monitoring developments closely and will update this page as details are confirmed.
Planned to launch in 2026. Exact date to be confirmed by DESNZ. Register your interest now to be notified when the scheme opens.
- Insulation upgrades (all types)
- Solar panels
- Heat pumps
- Other energy efficiency improvements
The application process is still being finalised. Register your interest now and we will contact you as soon as the scheme opens.
Any homeowner in England or Wales who is replacing a fossil fuel heating system — gas, oil, LPG, or electric storage heating. There is no income limit. The grant is available to all eligible applicants regardless of household income.
The grant is applied as an upfront discount. We deduct the full grant amount from your quote and claim it directly from Ofgem — you pay the reduced amount and we handle everything.
- £7,500 — standard air source heat pump
- £9,000 — off-gas properties (oil or LPG heating)
- Air source heat pump installation
- Supply, installation, and commissioning
- Building Regulations compliance
How Much Do Home Energy Improvements Cost and Save?
The cost and financial benefits of home energy improvements vary depending on your property type, existing condition, installation requirements, and available funding support. The table below provides typical UK estimates for common insulation, renewable energy, and heating upgrades — including grants where available.
| Improvement | Typical Cost | Annual Saving | Payback | Grant Available |
|---|---|---|---|---|
| Insulation | ||||
| Loft insulation | £400 – £1,200 | £300 – £400 | <2 years | Yes — ECO4 & WHP |
| Cavity wall insulation | £400 – £1,500 | £200 – £300 | <2 years | Yes — ECO4 & WHP |
| External wall insulation | £8,000 – £30,000 | £400 – £600 | 15–20 years | Partial — ECO4 & WHP |
| Internal wall insulation | £2,000 – £10,000 | £300 – £500 | 5–10 years | Partial — ECO4 & WHP |
| Underfloor insulation | £500 – £3,000 | £100 – £200 | 3–5 years | Yes — ECO4 & WHP |
| Solid floor insulation | £1,500 – £10,000 | £100 – £200 | 10–15 years | Partial — ECO4 & WHP |
| Park home insulation | £4,000 – £8,000 | £300 – £600 | 5–10 years | Yes — ECO4 |
| Renewable Energy & Heating | ||||
| Solar panels (4kW system) | £5,000 – £8,000 | £465 – £585 | 7–10 years | Partial — Warm Homes Plan (TBC) |
| Battery storage (5kWh) | £2,500 – £10,000 | £300 – £600 | 5–8 years | No — 0% VAT applies |
| Air source heat pump | £7,000 – £13,000 | £300 – £600 | Varies | £7,500 – £9,000 (BUS Scheme) |
Figures are typical UK estimates for 2026 and are for guidance only. Actual costs, savings, and payback periods depend on property type, size, existing condition, energy tariff, and usage. All costs confirmed at your free survey. Grant amounts and scheme availability are subject to government policy and eligibility criteria at the time of application.
How Do You Choose a Trusted Home Energy Installer?
Choosing the right installer is one of the most important decisions when planning home energy improvements. A qualified and experienced retrofit professional ensures your insulation, renewable energy systems, and heating upgrades are designed correctly, installed safely, and meet required industry standards.
LAMTANS Engineering is a Manchester-based retrofit specialist delivering insulation, renewable energy, and heating upgrades across the UK. We combine industry accreditations, PAS2035 compliance, and genuine retrofit expertise to help homeowners navigate every stage of their energy improvement project — from first survey to final sign-off.
Frequently Asked Questions
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Do I need to pay anything back for government grants? +
No. ECO4, Warm Homes Plan, and BUS Scheme grants are not loans — there is nothing to repay. ECO4 and the Warm Homes Plan are funded by energy suppliers as part of their legal obligations, while the BUS Scheme grant is deducted directly from your installation cost. In all cases, the grant is yours to keep.
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Can I get a heat pump if I live in a flat or terrace? +
Yes — heat pumps can be installed in flats and terraced homes in many cases, but you may need permission from your landlord or management company for external unit placement. We will advise you on suitability, planning requirements, and access during the free survey.
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Will a heat pump work in an old home? +
Yes, but your home should be adequately insulated first. Heat pumps work best with good insulation and larger radiators or underfloor heating — both of which we assess during the free survey. Improving insulation before fitting a heat pump maximises efficiency and ensures the system performs as designed.
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How long does each type of installation take? +
Typical installation times are: loft insulation — 1 day; cavity wall insulation — 1–2 days; external wall insulation — 2–3 weeks; solar panels — 1–3 days; air source heat pump — 2–5 days. Timelines may vary depending on the size and complexity of your property. We confirm a clear programme at your free survey.
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What if I do not qualify for a grant? +
We also offer private installation services at competitive prices for homeowners who do not qualify for government schemes. All work is delivered to the same standard, with the same accreditations and the same fixed-price guarantee. Contact us for a free quote and we will advise on all available options for your property.
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What accreditations does LAMTANS hold? +
LAMTANS Engineering is TrustMark Registered, RECC Accredited, and PAS2035 aligned — along with a range of further industry accreditations. We are Fully Industry Accredited for the retrofit and renewable energy work we carry out. Our full accreditations list is available on our accreditations page. We follow MCS consumer protection standards proactively across all solar and heat pump installations.
Ready to Improve Your Home's Energy Efficiency?
Get your free, no-obligation home energy survey today. We will assess your property, advise on the most effective improvements for your budget and property type, check your eligibility for available grants, and provide a fixed price — at no cost to you. We aim to provide advice within 72 hours following your free survey.