Semi-detached houses
Heat pumps for semi-detached houses
The UK's most common home, and a reliable fit for a heat pump. Here's the typical size, cost, and the one or two things to plan for.
Heat pumps for: Detached Semi-detached Terraced Cottage Victorian New build Bungalow Flat
Semi-detached houses are the backbone of UK housing and a dependable match for a heat pump. You usually have outdoor space on the unattached side or rear for the unit, and one shared wall doesn't cause problems. Sizing is moderate, so costs tend to sit in the middle of the range.
What matters most for semis
- Unit placement. The side passage or rear garden is the usual spot. Worth checking distance to the neighbour's boundary, which has noise rules — a good installer handles this.
- Insulation. Many semis are mid-century with cavity walls that can be insulated, lowering the system size you need.
- Radiators. Typically a handful may need upsizing.
Typical size and cost
| Typical system size | Before grant | After £7,500 grant |
|---|---|---|
| 6–10 kW | £11,000–£19,000 | £3,500–£11,500 |
Get a tailored figure with the cost calculator, or read the full cost guide.
Common questions
Are heat pumps suitable for semi-detached houses?
Yes. Semis usually have space on the unattached side or rear for the outdoor unit, and one shared wall is no obstacle. They're one of the most common heat pump installs in the UK.
What size heat pump for a semi-detached house?
Commonly 6–10 kW depending on size and insulation. A heat-loss survey confirms the exact figure for your home.
How much does a heat pump cost for a semi?
Around £11,000–£19,000 before the grant, or roughly £3,500–£11,500 after the £7,500 grant, depending on size and radiator upgrades.
Where does the outdoor unit go on a semi?
Usually the side passage or rear garden. Your installer checks the distance to your neighbour's boundary, which is subject to noise rules.
See the cost for your home
The calculator sizes a system for your property type and applies the grant — an instant estimate, no contact details needed.