House rewiring cost: the real all-in figure, not just the electrician
House rewiring cost in 2026 runs roughly £5,500 to £8,500 for a three-bedroom semi, with a national average around £6,500. Add 20–30% in the South East, which includes Harlow. But that is the electrician's figure — and it is not what you will spend. This page gives you the number that includes everything else, and an honest test for whether you need a full rewire at all.
What a rewire costs in 2026
| Property | Electrical work | Typical duration |
|---|---|---|
| Two-bedroom flat | £3,500–£5,500 | 4–6 days |
| Three-bedroom semi | £5,500–£8,500 | 5–7 days |
| Four-bedroom detached | £8,500–£12,000 | 8–10 days |
| Each additional bedroom | +£600–£1,000 | +½–1 day |
| Single room only | £300–£800 | About a day |
| National average, full rewire | Around £6,500 | — |
| South East / London premium | +20–30% | Applies in Harlow |
The number nobody publishes: what it actually costs all-in
A rewire is not an electrical job with some tidying afterwards. It is a building job in which an electrician does the first week. Here is a three-bedroom semi in Harlow priced the way you will actually pay for it:
| Line | Typical | Who does it |
|---|---|---|
| Electrical work (3-bed, South East) | £6,500–£8,500 | Electrician |
| Replastering chased walls & ceilings | £800–£2,500 | Plasterer — usually not in the quote |
| Decorating after plaster has dried | £800–£2,000+ | Decorator, or you |
| Lifting & relaying carpets / flooring | £200–£1,000+ | Flooring fitter, or you |
| Somewhere to live, if you move out | Varies | You |
| Realistic all-in | £8,500–£13,000 |
Do you actually need a full rewire?
Most people who arrive at this page do not. The usual real requirement is a consumer unit replacement plus one or two circuits renewed — a £1,200 job rather than a £9,000 one. The way to find out is not to guess from the age of the house. It is to measure:
| What an inspection finds | What it means |
|---|---|
| Rubber-sheathed or lead-sheathed cable | Full rewire. The insulation is at end of life wherever it is. |
| No earth at the lighting points | At minimum a full lighting rewire, often more. |
| Widespread C2 across most circuits | Full rewire is usually cheaper than pricing each item. |
| C2s on one or two circuits, rest sound | Partial. Renew those circuits, keep the others. |
| Sound PVC circuits, old board, no RCD | Board change only. Not a rewire. |
| House is "old" but everything passes testing | Nothing. Age is not a fault. |
An EICR costs about £119 for a three-bedroom house and answers this circuit by circuit. Spending £119 to find out whether you need to spend £9,000 is the highest-return decision on this page. If it comes back unsatisfactory, read what that actually means — and the five findings that genuinely justify a full rewire before anyone quotes you.
Harlow's housing stock, specifically
This matters more here than in most towns. Harlow was built as a post-war new town, so a very large share of the stock went up in a comparable window and has aged on a comparable schedule — and much of it has already been part-rewired once. The practical consequence is that mixed cable ages within one house are the norm rather than the exception: a 1990s kitchen circuit, an original lighting circuit, a 2010s shower circuit, one board. That is exactly the situation where a full rewire is often the wrong purchase and a targeted partial is right, and it is why an inspection beats an assumption here.
How long you lose the house for
The electrical work on a three-bed is 5–7 days. The disruption is not:
- Days 1–7 — first fix and second fix. Floors up, walls chased, power off in sections.
- Then plastering — a few days' work, then it has to dry. This is the stage people forget.
- Then decorating — you cannot paint fresh plaster immediately.
- Then floors back down.
Three to four weeks, realistically, from first lifted board to a room you want to sit in. You can stay in the house, and plenty of people do and regret it — plaster dust reaches everything and power comes and goes. The pragmatic middle route is to stage it floor by floor so there is always a habitable half. It costs a little more labour and far less than renting somewhere. Ask for it to be staged before the quote is written.
It is notifiable, and here that matters most
A rewire installs new circuits, so it is notifiable under Part P. A registered electrician self-certifies and notifies Building Control; you should end up with an Electrical Installation Certificate, a full schedule of test results and a Building Regulations compliance certificate. On a £9,000 job that paperwork is the asset: it is what proves at sale that the whole electrical installation was done properly, and it is the difference between a clean conveyancing answer and an indemnity policy. Verify registration on the Registered Competent Person Electrical register before you let anyone start.
Getting a comparable quote
- Get an EICR first so you are pricing a defined scope, not a guess.
- Decide full or partial on the findings, not the year the house was built.
- Specify the socket and light count per room — quotes diverge wildly on this and it is invisible otherwise.
- Ask what making good is included, in writing.
- Get the plastering priced at the same time.
- Ask for staging if you intend to stay.
- Confirm certification and notification are in the price.
Quotes on work this size are priced per job, not per hour — see electrician hourly rates for why an hourly comparison on a rewire is meaningless. If you let the property, the rewire and the statutory inspection interact: what landlords must actually hold. And if the reason you are here is repeated tripping rather than condition, start with fault finding — a rewire is an expensive way to chase one fault.
Get rewiring quotes in Harlow
Tell us the property size, what an inspection has found if you have had one, and whether you need making good included. Scope is what makes rewire quotes comparable.
What we will not do: we do not sell your details on, we do not add you to a marketing list, and we do not require a phone number. If you would rather not be called, leave the phone out — email is enough.