The UK’s Boiler Upgrade Scheme (BUS) now offers a £7,500 grant towards the cost of an air source heat pump, making 2026 one of the best years to switch from gas. But choosing the right installer matters just as much as choosing the right heat pump. In this guide we compare nine of the leading heat pump installation companies serving London — from national platforms to true local specialists — so you can make an informed decision.
All prices quoted below are after the £7,500 BUS Grant (subject to eligibility) has been deducted.
What to Look for in a Heat Pump Installer
Before you compare quotes, make sure every installer on your shortlist ticks these boxes:
- MCS Certification — Only MCS-certified installers can apply for the BUS Grant (subject to eligibility) on your behalf. Without MCS accreditation you will not receive the £7,500 government contribution. Every company in this guide is MCS-registered.
- BUS Grant (subject to eligibility) Handling — Some companies manage the entire grant application; others expect you to do the paperwork. Ask up front whether the installer submits the application, processes the voucher and deducts the grant from your invoice automatically.
- Combined Services — A heat pump rarely works in isolation. If you also need solar PV, a hot-water cylinder upgrade, electrical consumer-unit work or gas decommissioning, an installer who covers all trades under one roof can save weeks of coordination and thousands of pounds.
- Local vs National — National platforms offer brand recognition and scale pricing. Local installers offer faster response times, knowledge of your council’s planning rules and the ability to pop back for aftercare without scheduling weeks ahead.
- Warranty Length and Scope — Warranties range from 5 to 20 years across the market. Check whether the warranty covers parts only, parts and labour, or the full system including ancillaries like the cylinder and controls.
- Trustpilot and Review Volume — A 5.0-star rating from 50 reviews is not the same as a 4.7 from 12,000. Look at both the score and the number of verified reviews to gauge consistency.
Quick Comparison Table
| Company | Price After Grant | Solar? | Warranty | Trustpilot | Coverage |
|---|---|---|---|---|---|
| Octopus Energy | £2,500 – £5,000 | No | 7 years | 4.8/5 | National |
| Aira | £4,000 – £7,000 | No | 15 years | 4.4/5 | National |
| Glow Green | £2,500 – £7,500 | Yes | Varies | 4.7/5 (12,593 reviews) | National |
| Sunsave | ~£6,500 | Yes | Up to 20 years (subscription) | 4.7/5 | National |
| Heatable | £0 – £5,500 | No | Varies | 4.9/5 | National |
| Geo Green Power | £2,500 – £7,500+ | Yes | Varies | 5.0/5 (172 reviews) | London & SE |
| Your Energy Your Way | £1,500 – £6,500 | Yes | Varies | — | Hampshire / Berks / Surrey / West London |
| Thermo Solutions | £0 – £7,500 | No | Varies | — | SW London (TW / KT / Richmond) |
| Electromatic M&E | £4,500 – £9,000 (HP) / £8,000 – £16,000 (HP + Solar) | Yes | Manufacturer + workmanship | — | TW / Twickenham area & Greater London |
All competitor prices are approximate, based on publicly available data at time of writing. Actual quotes may vary.
National Platforms
Octopus Energy
Octopus Energy entered the heat-pump market by acquiring a manufacturer and building an end-to-end supply chain. Their in-house Cosy heat pump is designed in the UK and sold at aggressive price points — installations after the BUS Grant (subject to eligibility) can start from as low as £2,500, which undercuts most of the market. The standard warranty is seven years, and their Trustpilot rating of 4.8 out of 5 reflects generally strong customer satisfaction across a very large review base.
Pros: Lowest entry price in the market; vertically integrated manufacture; strong brand trust; energy tariff integration for cheaper running costs. Cons: No solar PV offering, so you will need a second contractor for panels; large operation means your install team may be subcontracted and less familiar with your local area; the seven-year warranty is shorter than several competitors. Octopus is best suited to straightforward boiler-replacement jobs in standard properties where price is the primary concern.
Aira
Aira positions itself as a premium, tech-forward heat-pump company. They manufacture their own pump, offer a market-leading 15-year warranty and provide a subscription finance model that spreads the cost into a monthly payment with no large upfront sum. After the BUS Grant (subject to eligibility), expect to pay between £4,000 and £7,000 depending on property size and system complexity. Their Trustpilot score is 4.4 out of 5.
Pros: 15-year warranty is one of the longest available; own-brand heat pump designed for the UK climate; subscription finance removes the capital barrier; modern app-based monitoring. Cons: Higher price than Octopus for a comparable property; no solar PV integration; the subscription model means you are tied in for a fixed term; 4.4 Trustpilot rating is the lowest on this list, with some reviews citing communication delays during peak periods. Aira is a strong choice if long warranty cover and monthly payment flexibility are priorities.
Heatable
Heatable made its name with online instant quotes for boiler replacements and has expanded into heat pumps. Their pricing after the BUS Grant (subject to eligibility) ranges from £0 — for properties that qualify for additional local-authority or ECO funding — up to £5,500 for a standard install. Their Trustpilot score of 4.9 out of 5 is one of the highest in the sector, reflecting an efficient digital-first customer journey.
Pros: Online instant-quote tool gives price transparency within minutes; very competitive pricing; excellent Trustpilot score; strong boiler-to-heat-pump transition expertise. Cons: No solar offering; primarily an online platform, so face-to-face engagement before the survey stage is limited; their core strength remains boiler replacements, so complex retrofit scenarios (listed buildings, large properties, multi-zone systems) may be better handled by a specialist. Heatable is ideal for customers who value speed, transparency and a digital booking experience.
Premium & National Installers
Glow Green
Glow Green is one of the UK’s largest renewable-energy installers, with over 12,593 Trustpilot reviews and a score of 4.7 out of 5. They offer a genuine one-stop shop: air source heat pumps, solar PV, battery storage and EV chargers can all be specified under a single contract. After the BUS Grant (subject to eligibility), heat-pump prices range from £2,500 to £7,500 depending on property type and whether solar is bundled.
Pros: Enormous review base provides confidence in consistency; true multi-technology installer (HP, solar, battery, EV); competitive pricing at the lower end; nationwide coverage with regional teams. Cons: As a large national operation, aftercare responsiveness can vary by region; warranty terms differ by product and should be checked at quote stage; some customers report longer lead times during peak summer months. Glow Green suits homeowners who want solar and a heat pump from one provider and value the reassurance of a well-established national brand.
Sunsave
Sunsave is a solar-first company that has expanded into heat pumps. Their subscription model bundles solar PV and a heat pump into a monthly payment with a headline guarantee of up to 20 years. A heat-pump-only installation after the BUS Grant (subject to eligibility) comes in at approximately £6,500. Their Trustpilot score is 4.7 out of 5.
Pros: 20-year guarantee on subscription plans is the longest in the market; solar-first expertise means intelligent system design when combining PV and a heat pump; monthly subscription avoids large upfront costs; strong focus on long-term energy savings. Cons: The subscription model is mandatory for the longest guarantee — outright purchase terms differ; heat-pump-only pricing is at the higher end; as a solar company first, their heat-pump track record is shorter than dedicated ASHP specialists. Sunsave is best for homeowners who want a combined solar-and-heat-pump system financed over time with maximum warranty cover.
Local London & Surrey Installers
Electromatic M&E
Electromatic M&E Ltd is a combined mechanical and electrical contractor based in the Twickenham (TW) area of south-west London. Unlike the national platforms above, Electromatic holds Gas Safe registration alongside ASHP (Level 3) certification, which means the same company that installs your heat pump can also safely decommission your old gas boiler, upgrade your consumer unit and wire in solar PV — all under one contract with a single point of accountability.
For a heat-pump-only installation after the BUS Grant (subject to eligibility), Electromatic’s pricing typically falls between £4,500 and £9,000. This reflects a like-for-like comparison with national providers once you account for the full scope of ancillary M&E work that is often quoted as extras elsewhere: cylinder upgrades, pipework modifications, electrical upgrades and commissioning. For a combined heat-pump-and-solar-PV package, expect to pay between £8,000 and £16,000 after the grant — a figure that covers the complete energy retrofit from gas to electric in a single project.
What sets Electromatic apart from the larger companies on this list is depth of local knowledge and accountability. The team works regularly in the TW, KT and Richmond postcodes, understands the planning nuances of conservation areas in Twickenham and Hampton, and can attend site within hours rather than weeks for warranty calls or system adjustments. Because Electromatic is a full M&E firm — not solely a heat-pump installer — they are also equipped to handle the unexpected: asbestos-containing flue removals, three-phase supply upgrades, underfloor heating integration and drainage modifications that fall outside the scope of a pure heat-pump company. For homeowners in south-west London who want a single, qualified local contractor to manage the entire transition from gas to renewable energy, Electromatic M&E is the most comprehensive option on this list.
Geo Green Power
Geo Green Power is a London and South East specialist with a perfect 5.0-out-of-5 Trustpilot score from 172 reviews. They work primarily with Vaillant and Stiebel Eltron heat pumps — two of the most respected European manufacturers — and offer solar PV alongside ASHP installations. After the BUS Grant (subject to eligibility), prices range from £2,500 to £7,500 or more.
Pros: Perfect Trustpilot score; manufacturer-specialist approach (Vaillant, Stiebel Eltron) ensures deep product knowledge; London and South East focus means regional expertise. Cons: The review base of 172, while excellent in quality, is smaller than national competitors; pricing at the upper end can rival national platforms without the same volume-driven discounts; coverage is limited to London and the South East. Geo Green Power is a strong choice for homeowners who want a premium European heat pump installed by a regional specialist with an exceptional customer-satisfaction record.
Your Energy Your Way
Your Energy Your Way serves Hampshire, Berkshire, Surrey and parts of West London. Their after-grant pricing of £1,500 to £6,500 is among the most competitive on this list, making them worth considering if your property falls within their coverage area. They offer both heat pumps and solar PV.
Pros: Very competitive pricing, particularly at the lower end; covers an under-served corridor between London and the South Coast; solar and heat pump combined packages available. Cons: Coverage does not extend to central or north London; limited publicly available review data makes due diligence harder; the very low entry price may reflect smaller or simpler installations rather than full-system retrofits. Your Energy Your Way is worth a quote if you live in Surrey or West London and are looking for value-focused renewable installation.
Thermo Solutions
Thermo Solutions operates in south-west London with a focus on the TW, KT and Richmond postcodes. They are a true local business — the kind of installer who knows your street. After the BUS Grant (subject to eligibility), their heat-pump pricing ranges from £0 (where additional council or ECO funding applies) to £7,500.
Pros: Hyper-local knowledge of the TW and KT areas; potential for zero-cost installations via stacked funding; responsive local aftercare. Cons: Very small coverage area limits them to south-west London only; limited online review presence makes independent verification harder; smaller operations may have longer lead times during busy periods if team capacity is stretched. Thermo Solutions is a solid option for homeowners in the Richmond and Twickenham area who prefer a neighbourhood-level installer.
How to Choose the Right Installer
Use this checklist when evaluating your shortlisted companies:
- Confirm MCS certification — Ask for the MCS number and verify it on the MCS database at mcscertified.com. Without this, no BUS Grant (subject to eligibility).
- Request an itemised quote — The headline price should break down the heat pump, cylinder, labour, scaffolding, electrical work and any extras. Compare like for like.
- Ask who handles the BUS Grant (subject to eligibility) paperwork — The best installers manage the entire application process and deduct the £7,500 from your final invoice so you never have to front the full cost.
- Check whether ancillary work is included — Gas decommissioning, consumer-unit upgrades, pipework modifications and hot-water cylinder replacements are often quoted separately. A combined M&E contractor will include them; a platform installer may not.
- Read the warranty terms in full — A “15-year warranty” that covers only the compressor is not the same as one covering parts, labour and ancillaries. Ask for the warranty document before signing.
- Verify Trustpilot and Google reviews — Look at both the score and the volume. Read the most recent 1-star and 2-star reviews to see how the company handles problems.
- Ask about aftercare response times — If your heat pump fails in January, how quickly can the installer attend? A local company can often respond the same day; a national platform may take a week.
- Check their experience with your property type — Victorian terraces, 1930s semis and new builds each present different challenges. Ask for examples of similar installations.
How Electromatic Can Help
Electromatic M&E Ltd offers free home surveys across London and Surrey. We install ASHP and solar PV within 2–4 weeks, handle all BUS Grant paperwork (subject to eligibility), and carry out all work under MCS certification via our accredited umbrella partner.
Call us: 07718 059 284 | Email: admin@electromatic.uk
FAQ
How much does a heat pump cost in London after the BUS Grant (subject to eligibility)?
After the £7,500 Boiler Upgrade Scheme grant, a standard air source heat pump installation in London typically costs between £2,500 and £9,000. The wide range reflects differences in property size, existing insulation levels, the complexity of pipework and electrical modifications, and whether a new hot-water cylinder is required. National platforms like Octopus Energy and Heatable offer the lowest entry prices, while full-service local installers like Electromatic M&E include ancillary M&E work that other companies may quote separately.
Do all heat pump installers handle the BUS Grant (subject to eligibility) application?
Most MCS-certified installers will manage the BUS Grant (subject to eligibility) application on your behalf, but it is not guaranteed. Some smaller firms or online platforms may ask you to apply directly through the Ofgem portal. Always confirm at quote stage that your chosen installer will submit the application, process the voucher and deduct the £7,500 from your invoice — this avoids having to pay the full cost up front and reclaim it later.
Can I get solar panels and a heat pump installed together?
Yes, and it is often more cost-effective to do so. Companies like Glow Green, Sunsave, Electromatic M&E and Geo Green Power offer combined heat-pump-and-solar packages. Bundling the two technologies reduces scaffolding costs, electrical work and disruption. Electromatic M&E, for example, prices combined HP-and-solar packages at £8,000 to £16,000 after the BUS Grant (subject to eligibility), covering the full energy retrofit under a single contract.
Is it better to choose a national installer or a local one?
There is no single right answer — it depends on your priorities. National platforms like Octopus Energy and Heatable offer competitive pricing, brand recognition and proven processes at scale. Local installers like Electromatic M&E and Thermo Solutions offer faster aftercare, deeper knowledge of your area’s planning rules and the ability to handle unexpected issues (like asbestos flues or three-phase supply upgrades) without subcontracting. If your installation is straightforward, a national platform may offer the best price. If your property is older, in a conservation area or needs combined M&E work, a local specialist is often the safer choice.
What warranty should I expect on a heat pump?
Warranty terms vary significantly. Octopus Energy offers 7 years, Aira offers 15 years and Sunsave’s subscription model includes up to 20 years. Most manufacturer warranties cover the heat-pump unit for between 5 and 10 years, with workmanship warranties from the installer covering an additional 1 to 5 years. Always ask whether the warranty covers parts only, or parts and labour. A long warranty is only valuable if the company is still trading when you need to claim on it — consider the financial stability of the installer as well as the headline number.
Do I need planning permission to install a heat pump in London?
In most cases, no. Air source heat pumps are permitted development in England, meaning you do not need planning permission provided you meet certain conditions: the unit must be at least one metre from the property boundary, only one pump is allowed per property, and noise limits must not be exceeded at the nearest neighbouring window. However, if your property is listed, in a conservation area or subject to an Article 4 Direction, you may need to apply for planning consent. Your installer should advise on this during the survey — local installers who work regularly in your borough will know the specific requirements.
Ready to Compare Quotes?
The best way to find the right heat pump installer is to get at least three quotes, compare them on a like-for-like basis and check references. If you are in the Twickenham, Richmond or south-west London area and want a single M&E contractor to handle your heat pump, solar, electrical and gas work under one roof, contact Electromatic M&E for a free home survey and no-obligation quote.
Last updated: March 2026. Prices, ratings and warranty terms are based on publicly available information and may change. Always verify directly with the installer before making a decision.
The information in this article is for general guidance only and does not constitute financial, legal, or technical advice. Energy savings estimates are based on typical UK household data from the Energy Saving Trust and Ofgem (April 2026 price cap). Actual savings depend on your property type, insulation levels, energy usage patterns, and electricity tariff. The Boiler Upgrade Scheme (BUS) grant of £7,500 is subject to eligibility criteria set by Ofgem — not all properties qualify. Electromatic M&E Ltd operates under MCS certification via an accredited umbrella partner. All installations comply with Building Regulations Part L and MCS standards. E&OE.
Written by Electromatic M&E Ltd — ASHP & Solar installer, London & Surrey (electromatic.uk)
Last updated: April 2026 | Electromatic M&E Ltd, Company No. 13837345
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