How much does an air source heat pump cost?
An air source heat pump's cost depends on the property and radiator changes. Get an indicative fitted figure below (before any grant).
What a heat pump install involves
- 1Heat-loss survey
The system is sized to the property's heat loss; well-insulated homes need smaller, cheaper units.
- 2Emitters and cylinder
Radiators may need upsizing for lower flow temperatures, plus a hot-water cylinder.
- 3Grant
The Boiler Upgrade Scheme offers a grant toward the cost for eligible properties — factor it in.
Heat pumps are increasingly relevant as EPC standards tighten. They work best in a well-insulated home, so the smart sequence is insulate first, then size the pump — which also keeps the cost down.
Air source heat pump costs (indicative)
| Property | Scope | Indicative cost |
|---|---|---|
| 1–2 bed | Smaller output | £7,000 – £10,000 |
| 3-bed house | Typical + some rads | £9,000 – £13,000 |
| Large / poorly insulated | Bigger + upgrades | £12,000 – £18,000 |
| After BUS grant | Less grant amount | reduced |
Before grant. Radiator upsizing, a cylinder and insulation improvements may be needed for efficiency.
Frequently asked questions
How much does an air source heat pump cost?+
Supply and fit typically costs £8,000–£14,000 before any grant, depending on property size, radiator changes and insulation. The Boiler Upgrade Scheme grant can reduce this significantly.
Is a heat pump worth it for a rental?+
It improves the EPC and future-proofs against tightening standards, but it's a higher upfront cost than a boiler. Weigh it against insulation improvements and the grant when planning long-term lettability.
Related tools & guides
Want to know how these figures are calculated? See our cost methodology.
Cost figures shown are indicative estimates, not quotations. You are responsible for verifying all costs (obtain contractor quotes) and any figures submitted to a lender. ScopeWise is a documentation tool, not financial, tax, structural or planning advice. HMO compliance prompts are guidance only — confirm requirements with your local council, as standards and licensing vary by authority.