Small wind turbines only make sense on exposed, rural sites with a strong, smooth wind and plenty of space, and they are often poor value in towns and suburbs. A freestanding turbine can cost tens of thousands of pounds, and building-mounted turbines have a poor record.
Planning permission is usually needed, and an MCS-certified turbine and installer is required to be paid through the Smart Export Guarantee for systems up to 50kW.
How a small wind turbine works
A turbine turns wind into rotation, and a generator turns that into electricity. The power available rises steeply with wind speed, so a site with a slightly better average wind can produce far more than one with a slightly worse average. That is why site choice matters more than the turbine brand.
Is your site suitable?
- Average wind speed: guidance commonly cites at least about 5 metres per second at hub height for a turbine to be worthwhile. Published wind maps are only a rough guide, and an on-site measurement over a period is far more reliable.
- Turbulence: buildings, trees and hedges disturb the wind. A turbine should sit well clear of obstacles, on a mast high enough to reach smooth air.
- Space: freestanding turbines need land for the mast, guy wires or foundation, and a safe distance from buildings, boundaries and overhead lines.
- Neighbours: noise and visual impact are the main reasons applications are refused or contested.
- Grid: check the connection with your network operator early. See the G98/G99 glossary entry.
In towns and suburbs the wind is usually too weak and turbulent for a worthwhile output, so solar PV is almost always the better first choice. See the Solar PV guide.
Roof-mounted or freestanding?
| Building-mounted | Freestanding | |
|---|---|---|
| Typical size | Very small, often around 1kW or less | From a few kW up to 50kW and beyond |
| Performance | Often poor because of turbulence around buildings | Much better when sited well |
| Structure | Vibration and loads on the building are a concern | Needs foundations, mast and clear space |
| Verdict | Rarely worth it | Can work on the right rural site |
What does it cost?
Costs depend heavily on size, mast height and groundwork, so there is no reliable single figure. Published installer and price-guide figures put a freestanding 6kW turbine at roughly £15,000 to £35,000 installed, and a 10kW turbine at roughly £30,000 to £60,000, including the mast, foundations, inverter and grid connection. That works out at roughly £3,000 to £6,000 per kW across the price guides checked, with smaller units at the expensive end. These sources are consumer price guides that disagree and some are dated, so treat them as a rough guide only (last verified October 2026). Building-mounted units cost less, at around £2,000 for 1kW, but often generate very little.
Get itemised quotes and ask each installer for a predicted annual output based on your measured or modelled wind speed, along with the assumptions used. Treat headline payback claims with caution.
Income and payback
You save the full retail electricity price on power you use yourself, and you are paid the export rate on the rest through a Smart Export Guarantee tariff. Because wind output is lumpy and does not follow your demand, a large share is often exported, which lowers the return. Payback on a poor site can be very long, and on a good site it depends on the turbine, the wind and your usage.
Planning permission and regulations
Wind turbines are more restricted than solar or heat pumps, and in most cases you should expect to need planning permission. Rules differ across England, Scotland, Wales and Northern Ireland, and they change, so check with your local planning authority and the Planning Portal before you buy. A freestanding turbine may also need an environmental, ecological or aviation check, and an electrical installation must meet the wiring and grid rules.
MCS and the Smart Export Guarantee
To be paid under the SEG for a system up to 50kW, the turbine and installer generally need to be MCS certified. Read our MCS certification guide, which covers the small wind requirements, and ask any installer for their certificate and their site assessment before you sign.
Common mistakes
- Fitting a turbine on a roof or in a sheltered garden because it is cheap.
- Relying on a national wind map instead of a proper site assessment.
- Underestimating the mast height needed to clear obstacles.
- Ignoring planning, noise and neighbour objections until after purchase.
- Believing optimistic output and payback figures.
See our wind turbine installer page for who does the work.
Sources and further reading
- Checkatrade: wind turbine cost guide Price guide used for cost ranges
- The Eco Experts: are domestic wind turbines worth it? Price guide used for cost ranges
- Planning Portal Official planning guidance for England
- MCS: the quality mark for small-scale renewables Certification and the installer directory
External links open in a new tab. Last checked October 2026.
Frequently asked questions
Are small wind turbines worth it in the UK?
Only on exposed, rural sites with a strong, smooth wind and space. In towns and suburbs the output is usually low, and solar PV is normally a better choice.
Do I need planning permission for a wind turbine?
In most cases yes. The rules are stricter than for solar panels and differ across the UK nations, so check with your local planning authority before buying.
How much does a small wind turbine cost?
A freestanding turbine of several kW commonly costs tens of thousands of pounds installed. Building-mounted units cost less but often generate very little. Get itemised quotes and predicted output.
Do I need MCS certification for a wind turbine?
To be paid under the Smart Export Guarantee for a system up to 50kW, the turbine and installer generally need to be MCS certified.
Should I put a turbine on my roof?
Usually not. Turbulence around buildings gives poor output, and vibration and loads on the structure are a concern.