The Complete Guide to Heat Pumps in the UK (2026)

What Is a Heat Pump and Why Are More UK Homeowners Choosing One?

A heat pump is a low-carbon heating system that moves heat from outside your home into your radiators, underfloor heating, and hot water cylinder. In the heat pumps UK market, most homes choose an air source heat pump because it suits typical British plots, qualifies for the £7,500 BUS grant subject to eligibility, and fits most retrofit projects better than ground source.

Energy Saving Trust updated its in-depth guide in February 2026 and says typical installation costs are around £11,000 for an air source heat pump and around £29,000 for a ground source heat pump. MCS also reported in August 2025 that there were 30,000 certified heat pump installations in the first six months of 2025, a 12% increase on the same period a year earlier, which shows the market is no longer niche.

The reason more homeowners are paying attention is straightforward. Gas boilers are familiar, but they are tied to fossil fuel heating, future policy pressure, and the need to replace ageing equipment anyway. A heat pump gives you a route to lower-carbon heating now, and it also prepares your property for a market that increasingly expects cleaner technologies.

For most homeowners in London, Surrey, Middlesex, and Berkshire, the key question is not whether heat pumps exist or whether they are “the future”. The real question is whether your specific home is a good fit, what the total cost looks like after the BUS grant, and whether the running costs and comfort justify the switch.

This guide answers those questions in practical terms. If you want a dedicated grant breakdown first, read our complete guide to the BUS grant. If you already know you want to explore your own home, you can also go straight to our BUS Grant survey page.

How Does an Air Source Heat Pump Work?

An air source heat pump works by absorbing low-grade heat from outside air, compressing a refrigerant to raise its temperature, and transferring that heat into your heating system and hot water cylinder. The simplest way to picture it is that a heat pump moves heat rather than generating it by burning fuel, which is why it can deliver several units of heat for each unit of electricity used.

Energy Saving Trust says heat pumps can generate around three units of heat for every unit of electricity they use, which is why they are commonly described as roughly 300% efficient in normal explanations. That does not mean your bills automatically fall in every property, but it does explain why heat pumps can compete with boilers even when electricity costs more per kWh than gas.

In most UK domestic systems, the basic sequence looks like this:

1. The outdoor unit draws in ambient air.
2. A refrigerant absorbs that heat and evaporates.
3. A compressor raises the refrigerant pressure and temperature.
4. A heat exchanger transfers that heat into water for your heating system.
5. The system sends warm water to radiators, underfloor heating, and a hot water cylinder.

This is also why system design matters so much. A gas boiler can blast very hot water through smaller radiators and still feel “normal”. A heat pump usually works best when the system is designed to run for longer at lower flow temperatures. That often means larger radiators, better balancing, smarter controls, or a more suitable hot water layout.

The technology is proven in cold climates and normal British winters. The question is usually not whether the machine can extract heat in winter, but whether the design is good enough to let it do that efficiently. That is why a serious room-by-room heat loss calculation matters more than brochure claims.

If you want a simpler standalone explainer, see our article on how a heat pump works. If winter performance is your main concern, read do heat pumps work in winter?.

What Types of Heat Pumps Are Common in the UK?

In the UK, the main residential choice is usually between an air source heat pump and a ground source heat pump, with air source systems dominating because they are cheaper, simpler to install, and better suited to ordinary suburban plots. Ground source can be excellent, but it needs more land or borehole work and a much higher upfront budget.

Energy Saving Trust says a typical air source heat pump costs around £11,000, whilst a typical ground source heat pump costs around £29,000, rising further if a borehole is required. That price gap is why most heat pumps UK searches are really looking for information on air source systems rather than a broad technology category.

Here is the practical comparison:

There are also air-to-air heat pumps, which can work well in smaller properties or specialist situations, but they are not the standard answer for most homes switching from wet central heating. In most family homes, the system needs to provide both space heating and hot water, which is why air-to-water systems dominate domestic retrofit discussions.

For most homeowners in existing housing stock, air source wins because it fits the physical and financial reality of the average British property. A three-bedroom semi in Twickenham or Kingston is much more likely to be a viable air source project than a ground source one because you do not need trenches across a large garden or a borehole budget on top of the plant cost.

If you are comparing technologies in more depth, our upcoming dedicated cluster pages will separate air source from ground source in more detail. For now, the working assumption for most retrofit enquiries should be air source unless your property clearly supports a ground loop or borehole case.

How Much Do Heat Pumps Cost in the UK in 2026?

In 2026, a typical air source heat pump in the UK costs around £11,000 before grant support, but real retrofit prices vary depending on your property size, radiator requirements, hot water setup, and electrical work. After the £7,500 Boiler Upgrade Scheme grant, subject to eligibility, many straightforward air source projects land in the £3,500 to £6,500 range for the homeowner.

Energy Saving Trust’s February 2026 guidance puts a typical air source heat pump at around £11,000 and a typical ground source heat pump at around £29,000. Those numbers are useful national benchmarks, but homeowners should treat them as starting points rather than fixed prices, because retrofit complexity is where quotes move.

Typical air source heat pump cost drivers include:

1. The size and heat loss of your home.
2. Whether existing radiators are large enough.
3. Whether you currently have a combi boiler and need a hot water cylinder.
4. Pipework changes, controls, and commissioning complexity.
5. Whether your installer is pricing a full system properly or just a headline unit swap.

Here is a practical homeowner cost table:

These are planning ranges, not quoted promises. The price is often higher in older properties when emitter upgrades are ignored at first quote stage and then added later. That is one reason some homeowners see wildly different quotations for what sounds like the same technology.

There is another financial point that matters for comparison content. A low quote is not automatically better value if it leaves out radiator upgrades, poor siting, cylinder changes, or proper commissioning. A heat pump is a system project, not just a product purchase. The unit itself is only one part of whether the home will feel warm, run efficiently, and qualify for support.

If you want a deeper cost-only breakdown, read our complete guide to heat pump costs in the UK. If grants are your main concern, our BUS grant guide goes into the funding rules in full.

Are Heat Pumps Cheaper to Run Than Gas Boilers?

Heat pumps can be cheaper to run than many older or higher-cost heating systems, but whether they beat a gas boiler depends on system design, your tariff, and how well the home is set up. In plain English, an efficient heat pump in a sensibly designed home can be competitive, but a badly designed system in a poorly prepared house can disappoint.

Energy Saving Trust says heat pumps generate around three units of heat for each unit of electricity they use, but also notes that they generally cost slightly more to run than new gas and oil boilers at current price ratios. For planning assumptions in this guide, we use 24.5p/kWh for electricity and 7.4p/kWh for gas based on April 2026 Ofgem price-cap constants used across this Electromatic content plan.

Using a simple comparison:

• A gas boiler at 90% efficiency delivering 10,000 kWh of heat needs roughly 11,111 kWh of gas input.
• A heat pump with a seasonal performance factor of 3.0 delivering 10,000 kWh of heat needs roughly 3,333 kWh of electricity input.

That gives the following planning comparison:

The lesson is that performance matters. A well-designed system running at a seasonal performance factor around 3.0 or higher can be broadly competitive or better, whilst a poorer design can make costs drift upwards. That is why system design, controls, flow temperatures, and radiator sizing are not secondary details. They are the difference between a successful retrofit and a frustrating one.

Heat pumps also look better when compared with direct electric heating, LPG, oil, or older inefficient systems. If you are off gas, or if your boiler is old and expensive to run, the financial case can be much stronger. Solar panels can improve the picture further by offsetting part of the heat pump’s electricity use, especially in shoulder months and daytime operation.

For a deeper running-cost breakdown, read heat pump running costs: what do you actually pay? and heat pump vs gas boiler: running costs compared.

Is Your Home Suitable for a Heat Pump?

Most UK homes can be suitable for a heat pump, but suitability depends less on the age of the property than on good design, emitter sizing, insulation basics, and available space for the outdoor unit and hot water cylinder. The short version is that many homes are workable, but the best outcomes come from survey-led design rather than assumptions.

Nesta reported in February 2026 that government data suggests 80% to 90% of UK homes already have enough insulation to run a heat pump. GOV.UK also provides a dedicated heat pump suitability tool, which reflects how mainstream this decision has become for owner-occupiers rather than treating it as a specialist retrofit only.

Here is a practical suitability checklist:

Older homes are not automatically poor candidates. Many Victorian terraces and 1930s semis across Richmond, Hampton, and Twickenham can work very well when the design is done properly. The real obstacles are usually practical: tight unit placement, missing cylinder space, undersized emitters, or unrealistic homeowner expectations based on boiler-style operation.

Flats are more complicated. Some can work, especially in block-wide or specialist designs, but many are constrained by outdoor unit placement, shared ownership structures, hot water limitations, and planning restrictions. That is why a house-by-house survey matters more than generic articles that claim heat pumps work “anywhere”.

If you want a deeper decision tree, read our detailed article on whether your home is suitable for a heat pump and our guide to heat pump radiators and whether you need to upgrade.

What Happens During a Heat Pump Installation?

A heat pump installation is usually a planned retrofit project that includes survey, heat-loss design, equipment selection, the outdoor unit, hot water cylinder changes, controls, commissioning, and homeowner handover. Most installations are not one-day boiler swaps, but GOV.UK says many heat pump installs are completed by a two-person team in a couple of days once the design and paperwork are sorted.

GOV.UK guidance on finding a heat pump installer says most heat pumps will take a team of two people a couple of days to install, though some jobs take longer. That timeline is realistic for straightforward air source projects, but homes needing multiple radiator upgrades, major pipework changes, or electrical alterations can take more time.

The installation sequence usually looks like this:

1. Survey and room-by-room heat-loss calculation.
2. System design, emitter review, and quote.
3. BUS grant check and application if you may qualify.
4. Pre-install planning for the outdoor unit, cylinder, and controls.
5. Installation of the outdoor unit, hydraulic components, cylinder, and pipework.
6. Testing, flushing, commissioning, and settings.
7. Handover so you understand controls, schedules, and expected behaviour.

The biggest expectation gap is usually behaviour, not hardware. A heat pump is often designed to run steadily and efficiently rather than in aggressive boiler-style bursts. Homes typically feel more even in temperature, but the system may run longer and differently from what you are used to. That is normal.

Installation day also brings practical decisions. You may need to clear access around the cylinder location, decide exactly where the outdoor unit should sit, and accept that some decorative making-good may follow. The more these points are agreed before arrival, the smoother the job runs.

If you want the full installation sequence, read our dedicated heat pump installation process guide and our article on planning permission for heat pumps.

How Long Do Heat Pumps Last and What Maintenance Do They Need?

A well-installed heat pump should be a long-life heating asset rather than a short-cycle appliance, but it still needs sensible servicing, system checks, and good controls setup. The practical answer is that you should expect routine maintenance, periodic optimisation, and a system lifespan that competes well with other major heating plant when the installation quality is right.

Energy Saving Trust’s 2026 heat pump guidance emphasises that running costs and performance depend heavily on design and control, which is also why maintenance matters. The same guide puts a typical air source heat pump at around £11,000, so annual servicing and sensible optimisation are worth treating as protection for a major heating asset rather than an optional extra.

Routine maintenance usually includes:

1. Annual service inspection.
2. Filter, pressure, and glycol checks where relevant.
3. Reviewing controls and weather compensation settings.
4. Checking system cleanliness, inhibitor, and circulation performance.
5. Confirming hot water temperatures and safe operation.

From a homeowner perspective, heat pumps are not maintenance-free, but they are also not unusually fragile if installed correctly. The most common long-term problems come from poor design choices at the start, such as incorrect sizing, poor hydraulic layout, noisy siting, or controls that were never really explained to the user.

You also need to think about ownership behaviour. If you constantly override schedules, shut off emitters, or treat the heat pump exactly like a boiler without understanding the differences, performance can suffer. A good installer should leave you with a system that is both technically sound and understandable in day-to-day use.

For more detail, read heat pump maintenance: what you need to know and our guide to hot water with a heat pump.

What Help Is Available Through the BUS Grant and Other Support?

The main help available for most heat pump buyers in England and Wales is the Boiler Upgrade Scheme, which offers £7,500 towards an air source or ground source heat pump, subject to eligibility. In practical terms, the BUS grant is the single biggest reason many homeowners can move from “interested” to “ready to quote” because it materially changes the upfront cost.

GOV.UK says current BUS support is £7,500 towards an air source heat pump and £7,500 towards a ground source heat pump, and that the installer applies on your behalf. GOV.UK also says you must own the property, be replacing a fossil fuel or direct electric heating system, and have a valid EPC, while the installer must complete and commission the job within 120 days of the grant application.

The basic funding checklist is:

1. You own the property.
2. The home has a valid EPC.
3. The project replaces an eligible heating system.
4. The installer applies on your behalf.
5. The work is completed within the scheme timescale.

There are important limits. The BUS grant is subject to eligibility, and it does not mean the full installation cost is covered. Hybrid systems are excluded, and some properties need EPC or insulation paperwork resolved before a voucher can be redeemed. Some new builds are also excluded under the scheme rules.

That is why the cleanest route is to treat funding as part of the design process rather than an afterthought. Your grant position affects budget, your budget affects system scope, and system scope affects whether you end up with a design that works properly. The right order is survey first, then quote, then application.

For the full funding breakdown, read our BUS Grant 2026 complete guide. If you want a broader grants overview, the planned grants cluster will sit alongside this pillar later in Stage 1.

Are Heat Pumps a Good Option for Homes in London, Surrey and the TW Area?

Heat pumps are often a strong option for homes in London, Surrey, and the TW postcodes because the housing stock is full of retrofit-friendly semis, terraces, bungalows, and detached houses, but local success depends on plot constraints, planning context, and a realistic design approach. In short, the region has excellent opportunity, but urban space and conservation rules make surveys more important than generic assumptions.

MCS reported in August 2025 that there were 170,000 certified renewable installations in the first six months of 2025 across solar, battery, and heat pumps, with 30,000 of those being heat pumps. That market growth matters locally because homeowners in higher-cost southern regions are increasingly looking for combined retrofit solutions, especially heat pump plus solar rather than a standalone boiler replacement mindset.

For this region, the most important local factors are:

1. Dense suburban housing
   Many homes in Richmond, Kingston, Twickenham, Putney, and Chiswick have workable plots but tighter unit placement than rural homes, so outdoor siting and noise positioning matter.

2. Period and mixed-age stock
   Victorian terraces, 1930s semis, and extended family homes can work very well, but they need proper heat-loss calculations and realistic emitter assessment.

3. Conservation and planning sensitivity
   Most heat pumps are permitted development, according to Energy Saving Trust, but listed buildings, conservation areas, and unusual layouts need extra care.

4. Strong case for pairing with solar
   South-facing and east-west roofs across suburban London and Surrey often make a strong case for adding solar PV and, in some cases, battery storage to improve the long-term economics of a heat pump.

The local strategic point is that Electromatic does not have to treat heating, solar, and general M&E work as separate silos. That matters because many homeowners want one contractor to assess the whole picture rather than one company for the heat pump, another for solar, and another for the electrical side. It often produces a cleaner design and a simpler customer journey.

If combined systems interest you, read our heat pump and solar panels combination guide and solar battery storage article.

How Electromatic Can Help

If you want practical help rather than generic national call-centre advice, Electromatic can survey your home, assess whether a heat pump is a good fit, and manage the project from design through installation and funding support. The goal is not to force a heat pump into every property, but to tell you honestly whether it makes sense for your house, your budget, and your future plans.

GOV.UK says homeowners should use suitable MCS-certified installers if they want to access support such as the Boiler Upgrade Scheme, and BUS installations must be completed and commissioned within 120 days of the grant application. Electromatic works under MCS certification via our accredited umbrella partner, which means we can deliver compliant projects whilst handling the grant process and documentation correctly for eligible installations.

What we can do for you:

1. Free home survey across London, Surrey, and the TW area for suitable projects.
2. Room-by-room heat-loss assessment and system design.
3. BUS grant handling, subject to eligibility.
4. Honest advice on radiators, cylinders, controls, and likely running-cost outcomes.
5. Integrated planning for air source heat pumps, solar PV, and battery storage from one contractor.

Because we are local, we can also give you more grounded advice on property types common around Hampton, Sunbury-on-Thames, Twickenham, Richmond, and Kingston. That means less guesswork, faster surveys, and a more realistic view of whether your home needs straightforward optimisation or a bigger retrofit conversation.

Book your free home survey →

Call us: 07718 059 284 | Email: admin@electromatic.uk

Frequently Asked Questions

Most homeowners looking up heat pumps UK are really trying to answer five practical questions: what a heat pump costs, whether it works in an older home, whether radiators need replacing, whether planning is a problem, and whether it is actually worth doing now. MCS reported 30,000 certified heat pump installations in the first six months of 2025, so these are now mainstream homeowner questions rather than edge-case retrofit queries.

How much does a heat pump cost in the UK after the BUS grant?

For a typical air source heat pump, many eligible homeowners pay around £3,500 to £6,500 after the £7,500 BUS grant, depending on the property and system upgrades required. Energy Saving Trust says a standard air source installation is around £11,000 before grant support, so your final figure depends on survey scope rather than a single national price.

Do heat pumps work in old houses?

Yes, many do. Nesta reported in February 2026 that 80% to 90% of UK homes already have enough insulation to run a heat pump, and many older British houses work well when the system is designed properly, the emitters are checked, and expectations are set around lower-temperature heating.

Do I need new radiators with a heat pump?

Not always, but some homes do need radiator upgrades. Heat pumps generally work best at lower flow temperatures than boilers, so the decision depends on your room-by-room heat loss and existing emitter sizes rather than a universal yes-or-no rule.

Can I get a heat pump if I live in a flat?

Sometimes, but flats are more constrained than houses. The biggest issues are outdoor unit placement, hot water cylinder space, ownership permissions, and planning or noise constraints, so a flat is never a paperwork-only decision.

Is it worth getting a heat pump in 2026?

For many homeowners, yes, especially if your boiler is ageing, you may qualify for the BUS grant, and you plan to stay in the property long enough to benefit from the upgrade. The strongest cases are usually homes that can run an efficient system, need a heating replacement anyway, and may also benefit from solar in the future.

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