PRICE GUIDE · PLUMBING & HEATING · 2026–2027
Solar Thermal Installation cost in the UK
£3,000–£6,000 per install. Typically £5,000.
Solar thermal hot water systems cost £3,000–£6,000 installed in the UK, about £5,000 typical. Flat-plate collectors are cheapest and evacuated tubes dearest; a cylinder without a solar coil, roof access and the length of pipe run push the price up.
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HOW MUCH IT COSTS
How much does solar thermal installation cost in the UK?
| Low end | £3,000 | a flat-plate system with a suitable cylinder |
|---|---|---|
| Typical | £5,000 | what most people pay |
| High end | £6,000 | evacuated tubes with a new cylinder |
Locufy guide prices for 2026–2027. Updated 2026. A national range, not a quote — enter your town above for real prices from the plumbers and heating firms near you.
What moves the price
- Collector type — flat-plate panels cost less than evacuated tubes, which work better in winter
- Cylinder — a hot water cylinder without a solar coil is replaced with a twin-coil one, which adds to the cost
- Roof access — scaffolding and steep or tall roofs add to the solar thermal installation
- Pipe run — long runs from roof to cylinder add pipework and insulation
- Roof orientation — a south-facing roof gets the most hot water from the panels
- Comparison with solar PV — a PV system with a diverter can compete on cost for hot water
Plumbing and heating prices in the UK are up 6% over five years (ONS Consumer Price Inflation, Services for maintenance and repair, to 2026 August). Five years ago a typical solar thermal installation would have cost about £4260 — an estimate from today's guide price and that index, not a recorded price. Source: ONS MM23 D7DO →
WHAT YOU GET
What a solar thermal installation booking includes
Takes: Two to three days for most solar thermal installations. Not included: Scaffolding, a new twin-coil cylinder where needed and roof repairs are often priced separately — see the related guides below.
WHAT PEOPLE BOOK
Common solar thermal jobs
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Solar Thermal Installation near you, with prices shown
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How to pay less
- Check your hot water cylinder has a solar coil before choosing solar thermal
- Compare solar thermal with solar PV and a diverter, which can also heat water
- Fit the solar thermal panels while scaffolding is up for roof work
Before you book
- Most roof-mounted solar thermal panels are permitted development, but listed buildings and conservation areas may differ
- Use an MCS-certified installer so the system meets recognised standards
- Ask what share of your yearly hot water the solar thermal system should supply
- Ask about servicing, as the antifreeze fluid needs checking every few years
Solar Thermal Installation cost: questions people ask
£3,000–£6,000 per install, about £5,000 typical. Flat-plate systems cost least; evacuated tubes with a new cylinder cost the most.
Usually two to three days, including scaffolding, roof work and connecting the cylinder.
No dedicated grant is widely available at present, but energy-saving installations can benefit from reduced VAT. Check current rules with your installer.
Solar thermal heats water directly and efficiently. Solar PV makes electricity for the whole home and can heat water with a diverter, so many homes now choose PV.
Scaffolding, a new twin-coil cylinder and roof repairs are often extra. Ask the installer to list each one so quotes compare fairly.
They are Locufy guide prices for the UK, read from published UK solar thermal costs — a national range, not a quote. Collector type and the cylinder decide your price.
MORE GUIDES