Heat Pump Installation Cost Breakdown UK 2026
A £12,000 heat pump quote is not a single cost — it is 10+ individual line items. Understanding each one lets you compare quotes properly, spot omissions, and negotiate from a position of knowledge.
This guide breaks down every component so you know exactly what you are paying for at 2026 prices.
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Total Cost Overview
A typical air source installation costs £10,000–£16,000 for most homes, with the majority around £11,000–£14,000. After the BUS grant of £7,500, most homeowners pay £3,500–£8,500 out of pocket. For the broader cost picture, see our complete cost guide.
1. The Heat Pump Unit (£4,000–£9,000)
The single largest cost item. Prices vary by output capacity, brand, refrigerant type, and features. For most 3–4 bed homes, a 7–12 kW unit costs £5,000–£7,500.
2. Hot Water Cylinder (£800–£1,800)
Almost every installation requires a heat pump-compatible cylinder with a larger coil. If you already have a suitable unvented cylinder, this cost is eliminated. Sizes range from 170 to 300 litres.
3. Installation Labour (£2,000–£4,500)
The second largest cost. A standard installation takes 2–3 days with 2–3 engineers. London and the South East are typically 15–25% more expensive. Commissioning is critical — a properly commissioned system runs efficiently from day one. Our installation guide explains what proper commissioning involves.
4. Pipework and Fittings (£500–£1,500)
Covers refrigerant pipework and heating circuit modifications. Cost depends on distance between outdoor unit and indoor connection point.
5. Electrical Work (£300–£1,200)
Dedicated circuit from consumer unit, isolator switch, and potentially a supply upgrade. Older properties with a 40A supply may need an upgrade (£500–£1,000).
6. Concrete Base or Mounting (£200–£600)
Options include poured concrete pad, pre-cast slabs, wall brackets, or raised frame. Anti-vibration mounts (£20–£50) are essential.
7. Radiator Upgrades (£0–£4,000+)
The most variable cost. Heat pumps run at 35–50°C versus 60–75°C for boilers. Some radiators may need upsizing.
| Scenario | Radiators Needed | Cost |
|---|---|---|
| Well insulated, modern radiators | 0–2 | £0–£800 |
| Average insulation, older radiators | 2–4 | £600–£2,000 |
| Poor insulation, small radiators | Most or all | £2,000–£4,000+ |
Read our detailed guide on whether you need new radiators.
8. Controls and Thermostat (£100–£500)
Room thermostat, outdoor temperature sensor, and potentially zone valves. Smart thermostats work with heat pumps but must be configured correctly.
9. Existing System Removal (£200–£500)
Gas boiler removal and supply capping. Oil boiler and tank removal can be more expensive due to environmental regulations.
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Example Quotes
Straightforward Installation — 3-Bed Semi, EPC C
Before grant
£12,300
After BUS grant
£4,800
Complex Installation — 4-Bed Detached, EPC D
Before grant
£17,950
After BUS grant
£10,450
Use our cost calculator for a personalised estimate. If you are thinking about pairing your installation with solar panels, the combined savings can be substantial.
How to Compare Quotes Properly
- Check all quotes include the same components
- Compare heat pump brand, model, and kW output
- Confirm commissioning, MCS certification, and building regs are included
- Check warranty terms on both unit and workmanship
- Ask about aftercare and annual servicing
The cheapest quote is not always the best value. Our quotes service connects you with vetted installers checked for quality.
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Frequently Asked Questions
Why do installation costs vary so much between quotes?
Different labour rates, equipment brands, radiator upgrade approaches, and aftercare levels. Always ask for an itemised breakdown.
Is the installation cost higher if I have a combi boiler?
Slightly — a new cylinder (£800–£1,800) is an additional item that homes with existing system boilers may not need.
Can I reduce costs by doing some work myself?
You can prepare the concrete base (£200–£400 saving). The actual installation must be done by an MCS-certified installer for the BUS grant.
Do I need to pay the full amount upfront?
Most installers ask for a 10–30% deposit. The BUS grant is deducted from the total, so you pay the after-grant amount.
Are there any ongoing costs after installation?
Annual servicing (£100–£200), electricity, and occasional repairs. See our maintenance cost guide.
What if my quote is much higher than these figures?
Ask for a detailed explanation. Get additional quotes for comparison through our free service.
About Heat Pump Installation Costs
Heat pump installation costs in the UK comprise the unit, hot water cylinder, labour, pipework, electrical work, controls, and potential radiator upgrades. With the BUS grant of £7,500, most homeowners pay £3,500–£8,500 for a fully installed air source system. This guide is part of our resource hub covering costs, installation, air source systems, and grants. For information on combining solar with a heat pump, visit Home Solar Guide.