How much does it cost to rewire a house in the UK? It’s one of the biggest single jobs a homeowner faces — and one of the least optional when it’s needed. Old wiring isn’t just inconvenient; it’s a genuine fire and shock risk. Here’s what rewiring actually costs in 2026, what’s involved, and how to keep the bill under control.

We had our 1930s semi rewired five years ago. The quotes ranged from £3,800 to £7,500 for the same house — and the difference taught me a lot about what you’re actually paying for. Let me pass it on.

Cost to rewire a house UK: by property size

  • 1-bed flat: £2,500-£4,000
  • 2-bed house/flat: £3,500-£5,500
  • 3-bed semi: £4,500-£7,500
  • 4-bed detached: £6,000-£10,000
  • 5-bed / large period property: £8,000-£15,000+

London and the South East run 20-30% higher. These figures assume reasonable access — occupied, furnished houses with solid walls cost more than empty ones with floorboards up, because the labour (lifting floors, chasing walls, making good) is the bulk of the cost, not the cable.

What’s included in a rewire

A full rewire means: new consumer unit (fuse box) with RCD/RCBO protection, new cabling throughout to current regulations (BS 7671), new sockets, switches and light fittings positions as agreed, new circuits for kitchen, shower and high-load appliances, earthing and bonding brought up to standard, and certification (Electrical Installation Certificate) plus Building Regulations notification. What it usually doesn’t include: replastering and redecorating afterwards — budget £1,000-3,000 for making good, because chasing walls makes a mess.

What drives the price up or down

  • Occupied vs empty: rewiring an empty house is 20-30% cheaper — no furniture to move, no working around lives. If you’re renovating anyway, do the rewire first.
  • Access: floorboards up is easy; solid concrete floors, stud walls full of insulation, and listed-building restrictions all add labour.
  • Number of sockets and circuits: more sockets, more cost — but skimping here is false economy. Plan for modern life: USB sockets, kitchen circuits, outdoor power, EV charger provision.
  • Consumer unit location: moving it adds cost; keeping it put saves.
  • Making good: some electricians include basic filling; full replastering is separate.

Do you actually need a rewire?

Not every old house needs one — get an Electrical Installation Condition Report (EICR, £150-300) first. It grades the installation and tells you whether you need a full rewire or targeted remedial work. Our guide to how to know if your house needs rewiring covers the warning signs in detail. If the EICR comes back with C1 (danger present) or C2 (potentially dangerous) codes, act on them — they’re not advisory.

Choosing an electrician

Rewiring is notifiable work — it must be done or certified by a registered electrician (NICEIC, NAPIT or ELECSA registered). Get 3 quotes minimum, all after a proper site visit (anyone quoting a rewire without visiting is guessing). Check registration on the Electrical Safety First website or the competent person registers. Ask for recent rewire references and go see the work if you can. Our guide to finding a reliable electrician covers vetting in depth.

And a legal note: some smaller electrical jobs you can do yourself — see whether you can change a light fitting yourself legally — but a rewire is firmly professional-only.

Living through a rewire: survival guide

A rewire in an occupied house takes 5-10 working days and it’s genuinely disruptive: power goes off in sections (sometimes entirely), floors come up, walls get chased, dust gets everywhere. Survival tips: agree a daily power schedule with the electrician (evenings powered, ideally), seal off rooms with dust sheets, move valuables and electronics away from work areas, and plan to be out during the noisiest days if you can.

The dust is the thing people underestimate — fine plaster dust penetrates everything. Cover soft furnishings, seal wardrobes with tape, and accept that a deep clean (£150-250 professional) is part of the project cost. It’s a week of chaos for decades of safety — keep that trade in mind when the dust gets you down.

Future-proof while the walls are open

A rewire is a once-in-25-years opportunity — the walls are open, the floors are up, the electrician is there. Add now what you’d regret skipping: extra sockets everywhere (double sockets where you’d put singles — the cost difference is trivial during a rewire, expensive later), USB charging sockets in bedrooms and living areas, outdoor sockets and lighting circuits, wired data points (Cat6 — faster and more reliable than wifi for desks and TVs), EV charger provision (cable run now, charger later), and smoke/heat alarm circuits (mains-powered interlinked alarms are now expected). Each addition costs little during the rewire and a fortune as a standalone job later.

Quick answers

How disruptive is a rewire really?
Very, for 5-10 working days: power off in sections, floorboards up, walls chased, dust everywhere. It’s the most disruptive common home job short of an extension. Doing it in an empty house (during renovation or between tenancies) transforms the experience.

Can I live in the house during a rewire?
Yes — most rewires happen in occupied homes. Agree a daily power schedule with the electrician, seal rooms with dust sheets, and expect chaos. It’s manageable for a week or two, especially if you can stay elsewhere for the worst days.

Does a rewire add value to the house?
It removes a negative rather than adding a positive — buyers and surveyors flag old wiring, and mortgage lenders sometimes require remedial work. A certified rewire with paperwork smooths sales. Don’t expect to recover the full cost in added value, but expect deals to fall through without it.

How often does a house need rewiring?
Modern installations last 25-30+ years. The trigger isn’t age alone — it’s the EICR result. Get tested every 10 years (owner-occupied) and rewire when the report says so, not on a schedule.

Plan it, don’t dread it

How much does it cost to rewire a house in the UK? £3,500-£7,500 for most 2-3 bed homes, more for larger or London properties. Get an EICR first, get three proper quotes, do it while the house is empty or being renovated if you can, and budget for the redecoration after. It’s disruptive and expensive — but 25 years of safe, modern electrics is worth doing properly, once.