PRICE GUIDE · ELECTRICAL · 2026–2027
Three-Phase Installation cost in the UK
£1,200–£6,000 per job. Typically £1,500.
Upgrading a UK home to three-phase power costs £1,200–£6,000, with about £1,500 typical where a three-phase cable already runs in the street. The network operator's work is the big unknown — a long new cable or network reinforcement costs far more — plus a three-phase consumer unit inside.
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HOW MUCH IT COSTS
How much does three-phase installation cost in the UK?
| Low end | £1,200 | a simple upgrade with three-phase cable nearby |
|---|---|---|
| Typical | £1,500 | what most people pay |
| High end | £6,000 | a long new cable or network reinforcement |
Locufy guide prices for 2026–2027. Updated 2026. A national range, not a quote — enter your town above for real prices from the electricians and electrical firms near you.
What moves the price
- Network operator works — the distribution network operator decides and charges for the new supply
- Distance to three-phase cable — a cable already in the street is far cheaper than a new run
- Network reinforcement — a local substation or cable upgrade can push costs up sharply
- Consumer unit — a three-phase board and new wiring inside the house add to the cost
- What it powers — 22kW EV chargers, large heat pumps and workshops drive the need
- Meter change — a three-phase meter is fitted by your supplier, which can add time to the job
Electrical work 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 three-phase installation would have cost about £1420 — an estimate from today's guide price and that index, not a recorded price. Source: ONS MM23 D7DO →
WHAT YOU GET
What a three-phase installation booking includes
Takes: A day for the electrician's work, with network operator works scheduled separately and often weeks away. Not included: The network operator's own connection charges are often quoted separately, along with groundworks and the EV charger or heat pump itself — see the related guides below.
WHAT PEOPLE BOOK
Common three-phase installation jobs
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Three-Phase Installation near you, with prices shown
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How to pay less
- Ask for the new three-phase meter position close to the street cable, as a shorter run keeps the network operator's charge down
- Check whether a larger single-phase supply would meet your needs instead
- Combine the three-phase installation with an EV charger or heat pump install to share labour
Before you book
- Only the network operator can upgrade the supply to three-phase — an electrician cannot arrange it alone
- Ask your electrician to confirm the loads really need three-phase before applying
- Network operator works can take weeks or months, so plan the three-phase timing early
- New three-phase circuits should be certified by a registered electrician
Three-Phase Installation cost: questions people ask
£1,200–£6,000 per job, about £1,500 typical where three-phase cable is already nearby. A long new cable or network reinforcement costs the most.
The electrician's work takes about a day, but network operator works are often scheduled weeks or months ahead.
Only for 22kW charging. Most homes charge happily at 7kW on a single-phase supply.
You or your electrician apply to the local network operator, which designs and carries out the connection and charges for it.
Network operator charges are often separate, along with groundworks and the equipment needing the supply.
They are Locufy guide prices for the UK, read from published UK three-phase supply costs — a national range, not a quote. The network work decides most of your price.
MORE GUIDES