Ground Source Heat Pump Cost UK: 2026 Prices & Grants
A ground source heat pump installation typically costs more upfront than an air source system because the project also needs buried ground loops or one or more boreholes. Energy Saving Trust currently gives a benchmark of around £15,000 for an installation using trenches, while a borehole installation can cost considerably more and may reach around £57,000.
This guide explains what those figures include, why quotations vary so widely, how the £7,500 and £9,000 Boiler Upgrade Scheme grants affect the cost, and when paying more for ground source heating may make sense.
- Updated September 2026
- UK homeowner cost guide
- Official grant rules checked
Quick Answer: How Much Does a Ground Source Heat Pump Cost?
Energy Saving Trust currently says a ground source heat pump installation is typically around £15,000 when the ground loop is installed in trenches. If the property needs vertical boreholes instead, the complete project can cost considerably more; its wider heat-pump guide gives an upper benchmark of around £57,000.
These are broad national planning figures, not fixed prices. Your quotation will depend on the property’s heat loss, the required heat-pump output, the ground conditions, access for machinery, the type and length of ground array, the hot-water system, emitters, controls and any electrical or building work.
The most important cost distinction
A horizontal ground-loop system usually needs substantial usable land but relatively straightforward excavation. A vertical system uses much less surface area but requires specialist borehole drilling. The groundworks can therefore change the project cost dramatically.
Ground Source Heat Pump Costs at a Glance
| Installation Route | Current Planning Benchmark | Main Cost Driver |
|---|---|---|
| Horizontal ground loops in trenches | Around £15,000 | Land area, excavation, access and ground-loop design |
| Vertical borehole system | Considerably more; potentially around £57,000 | Drilling depth, geology, number of boreholes and site access |
| Shared ground loop | Project-specific | Number of homes, communal infrastructure, ownership and maintenance arrangements |
Important: The figures above are Energy Saving Trust benchmarks published in July 2026. They should help with early budgeting, but they do not replace a property survey, heat-loss calculation, ground assessment or itemised quotation.
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How Much Is a Ground Source Heat Pump After the Grant?
In England and Wales, the Boiler Upgrade Scheme currently provides £7,500 towards an eligible ground source heat pump. Until 31 March 2027, eligible off-gas-grid properties replacing oil or LPG can receive an additional £1,500, taking the total grant to £9,000.
| Illustrative Project Cost | After £7,500 Grant | After Eligible £9,000 Grant |
|---|---|---|
| £15,000 | £7,500 | £6,000 |
| £25,000 | £17,500 | £16,000 |
| £40,000 | £32,500 | £31,000 |
These examples only subtract the grant from an illustrative total. They are not quotations or promises that every part of a project will be grant-eligible. Your installer should explain which costs are included and show the grant as an upfront discount.
The Boiler Upgrade Scheme is installer-led and has property, system and capacity requirements. Read our Heat Pump Grants UK guide before assuming that a particular project will qualify.
What Is Included in a Ground Source Heat Pump Quote?
A ground source quotation should cover the whole heating system, not only the heat-pump unit. Depending on the property, it may include:
- a room-by-room heat-loss calculation and system design;
- the ground source heat-pump unit and indoor hydraulic equipment;
- horizontal collector pipework or vertical boreholes;
- manifolds, antifreeze solution, pumps and controls;
- excavation, drilling, spoil handling and reinstatement;
- a suitable hot-water cylinder;
- radiator, underfloor-heating or pipework changes;
- electrical work and any necessary supply assessment;
- commissioning, balancing, certification and handover; and
- warranties and an explanation of future servicing responsibilities.
Two quotes can look very different simply because one includes groundworks, emitter changes and reinstatement while another leaves them as separate allowances. Compare the scope line by line before comparing the final price.
Horizontal Ground Loops vs Boreholes
Horizontal Trenches
Pipework is buried across a suitable area of ground. This can be the more affordable route where there is enough land and machinery can reach it safely.
- Usually lower groundworks cost than boreholes
- Needs considerably more usable land
- Can disrupt lawns and landscaping temporarily
- Design depends on soil and ground conditions
Vertical Boreholes
Ground-loop pipework is installed in deep drilled boreholes. This reduces the surface area required but makes specialist drilling a major part of the budget.
- Useful where garden area is limited
- Higher specialist groundworks cost
- Geology and drilling access matter
- Permissions and groundwater considerations may apply
The cheapest layout is not automatically the right layout. The ground array needs to be designed around the home’s heat demand and local ground conditions so that it can provide sustainable heat extraction over the long term.
What Makes a Ground Source Heat Pump More Expensive?
1. Property heat loss
A larger or harder-to-heat property may need a higher-output heat pump and a larger ground array. Floor area alone is not enough to size the system: insulation, glazing, airtightness, exposed walls and local design temperature all matter.
2. Ground-loop type and size
Horizontal loops need sufficient land, while boreholes need specialist drilling. The collector must be designed for the heat demand and the thermal characteristics of the ground rather than chosen from a generic rule of thumb.
3. Geology and ground conditions
Soil conductivity, rock, groundwater, contamination, buried services and difficult access can all change the design and cost. Larger or more complex borehole projects may need additional geological assessment.
4. Access and reinstatement
Excavators or drilling equipment need a safe route onto the site. Restricted access, protected landscaping, spoil removal, driveways and extensive garden reinstatement can add cost.
5. Radiators and underfloor heating
Ground source heat pumps still need emitters capable of heating the rooms at the chosen flow temperature. Some homes can retain existing radiators; others need larger radiators, fan-assisted emitters or underfloor-heating work. See our guide to radiators and heat pumps.
6. Hot water and internal equipment
Homes replacing a combi boiler will usually need space for a hot-water cylinder. Cylinder size, plant-room layout, pumps, buffers or volumisers, pipework and controls can all affect the price.
7. Electrical work
The installer should assess the existing electrical supply and identify any new circuits, protection equipment or wider work required. Do not assume every quote includes the same electrical scope.
Is a Ground Source Heat Pump Cheaper to Run?
A well-designed ground source heat pump can operate efficiently because ground temperatures are generally more stable than outdoor air temperatures. That does not guarantee lower bills for every household.
Actual running costs depend on:
- the property’s annual space-heating and hot-water demand;
- the heat pump’s seasonal performance;
- the ground-array design;
- flow temperature and emitter sizing;
- controls, commissioning and household usage;
- circulation-pump electricity use; and
- the electricity tariff compared with the fuel being replaced.
A useful estimate starts with the home’s required useful heat, divides it by a realistic seasonal performance figure, and then applies the electricity tariff. Our Heat Pump Running Costs UK guide explains why the same appliance can produce very different bills in different homes.
No guaranteed saving: Installation cost, efficiency and fuel-price comparisons should be assessed separately. A technically efficient system may still take a long time to recover a large borehole investment through energy savings alone.
Ground Source vs Air Source Heat Pump Cost
| Cost Question | Ground Source | Air Source |
|---|---|---|
| Typical upfront position | Usually higher because of trenches or boreholes | Usually lower because no buried ground array is required |
| Land requirement | Significant for horizontal loops; less surface area for boreholes | Suitable outdoor location and airflow required |
| External unit | Usually no outdoor fan unit | Outdoor fan unit required |
| Heat-source temperature | Relatively stable ground conditions | Changes with outdoor air temperature |
| Grant in England and Wales | £7,500, or £9,000 for eligible off-grid oil/LPG replacements | Same amounts for eligible air-to-water systems |
Air source is the more practical choice for many UK homes because it avoids major groundworks. Ground source becomes more attractive where there is suitable land or borehole access, the project is being planned as part of a major renovation or new build, and the owner values the stable heat source and unobtrusive external appearance.
For the alternative budget, read our Air Source Heat Pump Cost UK guide.
Ground Source Heat Pump Funding Across the UK
England and Wales
The Boiler Upgrade Scheme provides £7,500 towards eligible ground source heat pumps, including water-source systems and qualifying shared ground loops. Eligible off-gas-grid properties replacing oil or LPG can receive £9,000 until 31 March 2027. The installer normally applies on the property owner’s behalf.
Scotland
Home Energy Scotland currently offers grant and interest-free loan support for eligible heat-pump installations. Its published maximum combined funding is £15,000, or £16,500 with the rural uplift, with up to £7,500 normally available as grant funding. Eligibility and available funding should be confirmed before work begins.
Northern Ireland
The Boiler Upgrade Scheme does not apply in Northern Ireland. Homeowners should check current support through NI Energy Advice rather than assuming the England and Wales grant values apply.
Do You Need Planning Permission?
Ground source heat pumps do not usually need planning permission in England, but exceptions can apply. Listed buildings, conservation areas, protected sites, boreholes, groundwater considerations and work outside the property boundary may require additional checks or consent.
Planning and environmental rules vary across England, Wales, Scotland and Northern Ireland. Confirm the position with the relevant local planning authority and installer before excavation or drilling begins. Building regulations and relevant technical standards still apply even where planning permission is not required.
Is a Ground Source Heat Pump Worth the Cost?
A ground source heat pump is most likely to justify serious consideration where the site has suitable land or drilling access, the home has a substantial and long-term heat demand, and the system can be designed as part of a wider renovation or heating upgrade.
Potentially a Strong Fit
- Large plot with suitable ground
- New build or major renovation
- Long-term ownership
- Replacing oil, LPG or direct electric heating
- Suitable low-temperature emitters
- Several homes able to share ground infrastructure
Needs Careful Comparison
- Restricted garden or drilling access
- Complex or uncertain ground conditions
- Short expected ownership period
- High-temperature emitters throughout
- Budget depends on quick financial payback
- An air source system would meet the same need more simply
The decision should compare complete systems rather than equipment labels. Consider installation disruption, grant support, annual energy use, maintenance, expected service life and the alternative cost of an air source heat pump. Our guide to whether heat pumps are worth it explains the broader homeowner decision.
Questions to Ask Before Accepting a Quote
- What room-by-room heat-loss calculation has been used?
- What heat-pump output is required at the local design temperature?
- Why is a horizontal loop or borehole system being recommended?
- How was the required ground-array size calculated?
- What ground information, tests or geological assumptions support the design?
- Are excavation, drilling, spoil removal and reinstatement included?
- Which radiators, pipework or underfloor-heating components need changing?
- Is a new hot-water cylinder included?
- What seasonal performance and annual electricity use are forecast?
- Which electricity costs and household heat demand were used in that forecast?
- What grant value has been assumed, and has eligibility been checked?
- Who is responsible for planning, borehole and environmental checks?
- What commissioning, monitoring, warranties and servicing are included?
Get several itemised quotations where practical. A cheaper proposal may simply exclude important work that another installer has included.
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Our Verdict
A ground source heat pump can provide efficient, low-carbon heating, but its cost depends as much on the ground array and site as on the heat-pump unit.
The current £15,000 trench-based benchmark makes ground source look competitive for some suitable sites after grant support. Borehole projects can be much more expensive, so their benefits need to be weighed against an air source alternative and the owner’s long-term plans.
Start with the home’s heat loss and the site’s ground options. Then compare complete, itemised designs rather than choosing from a headline equipment price.
Frequently asked questions
How much does a ground source heat pump cost in the UK?
Energy Saving Trust currently gives a benchmark of around £15,000 where the ground loop is installed in trenches. Borehole installations can cost considerably more and may reach around £57,000. The final amount depends on the property, ground array, geology, access and heating-system upgrades.
How much is a ground source heat pump after the £7,500 grant?
If an eligible installation cost £15,000 and the full £7,500 Boiler Upgrade Scheme grant applied, the simple remaining amount would be £7,500. This is only arithmetic: actual quotations and eligible costs vary.
Can you get a £9,000 grant for a ground source heat pump?
Yes, until 31 March 2027 an eligible off-gas-grid property in England or Wales replacing oil or LPG can receive £9,000 towards an eligible ground source heat pump. Other qualifying properties normally receive £7,500.
Are boreholes more expensive than horizontal ground loops?
Usually. Boreholes need specialist drilling, while horizontal loops normally use shallower trenches across a larger land area. Site access, geology, depth and the number of boreholes can materially affect the price.
Is ground source cheaper to run than air source?
Ground source systems can benefit from relatively stable source temperatures, but lower running costs are not guaranteed. The comparison depends on both systems’ design, seasonal performance, circulation energy, flow temperature, heat demand and electricity tariff.
How much land is needed for a ground source heat pump?
There is no safe universal answer based only on house size. The required area depends on heat demand, ground conditions and collector design. A competent designer should calculate it for the specific property.
Sources and further reading
- Energy Saving Trust: Ground source heat pumps: costs, savings and benefits
- Energy Saving Trust: Heat pumps: how they work, costs and savings
- GOV.UK: Boiler Upgrade Scheme: what you can get
- GOV.UK: Approved Boiler Upgrade Scheme grant categories and values
- Ofgem: Boiler Upgrade Scheme
- Home Energy Scotland: Grant and loan terms
- Planning Portal: Ground source heat pumps
- MCS: Heat-pump installation standard MIS 3005