There is no single fixed price for rewiring a house in London. NICEIC's current homeowner guidance says a home rewire can range from a few thousand pounds for smaller projects to £10,000 or more for larger and more complex properties. The final quotation depends on the size and layout of the property, number of circuits and electrical points, access, existing wiring, occupancy and the specification agreed before work begins.
What Does a House Rewire Cost in Practice?
A useful starting point is the current NICEIC homeowner guidance, which describes home rewiring as ranging from a few thousand pounds for smaller projects to £10,000 or more where the property or electrical work is larger and more complex.
Treat any headline figure as an estimate, not a quotation. Two London homes with the same number of bedrooms can require very different amounts of labour, cabling, accessories and access work.
Bedroom count gives a rough idea of scale, but it does not show how many circuits are needed, how many sockets and lighting points are planned, whether existing cable routes can be used or what condition the current installation is in.
There is a separate article covering the narrower question of
rewiring a three-bedroom house.
This article keeps the focus on the wider London house-rewiring cost question.
What Makes a London House Rewire More or Less Expensive?
Property size and layout
A larger property normally involves more cable routes, rooms, circuits and electrical points. Layout also matters because two homes with similar floor areas can have very different installation requirements.
Number of circuits and electrical points
More socket outlets, lighting points, switches, dedicated supplies and fixed equipment generally mean more installation work, cable and testing.
Access to walls, floors and ceilings
Cable routes that are difficult to reach can increase labour. Fitted furniture, finished floors, restricted voids and decorated surfaces can all affect how the wiring can be installed.
Existing wiring condition
Previous alterations, damaged wiring or unusual circuit arrangements can affect the work required before the new installation is completed.
Occupied or vacant property
An empty property is generally easier to work through. Occupied homes require additional planning around access, furniture, temporary use of rooms and periods when circuits need to be isolated.
Specification and finish
Standard accessories and a straightforward layout are different from a project with additional sockets, decorative fittings, specialist controls or a substantially revised electrical layout.
Is a Partial Rewire Cheaper Than a Full Rewire?
A partial rewire normally involves less work because only defined circuits, rooms or areas are being replaced. That does not automatically make it the correct option.
If the wider electrical installation remains suitable and the required work is genuinely localised, partial rewiring may avoid replacing circuits that do not need replacement. Where ageing or unsuitable wiring is widespread, dividing the project into small sections can be a false economy.
The decision should therefore be based on the condition and scope of the installation rather than cost alone. The dedicated guide to
partial versus full rewiring
covers that decision in more detail.
What Should Be Included in a House-Rewiring Quotation?
A useful quotation should make the proposed electrical scope clear enough for you to compare it with another quotation. A cheaper headline price is difficult to judge if important parts of the job have been excluded.
- The rooms and areas included in the rewire.
- The circuits being replaced or newly installed.
- The proposed number of socket outlets, switches and lighting points.
- Any dedicated circuits for fixed electrical equipment.
- What work is proposed at the consumer unit.
- The type or level of electrical accessories included.
- Inspection and testing of the completed electrical work.
- The electrical certification to be provided for qualifying new work.
- Whether making good, plastering, decoration or floor repairs are included or excluded.
- Whether VAT and any other clearly identified charges are included in the quoted total.
For the installation itself,
a rewiring assessment
allows the existing installation, property layout and proposed electrical requirements to be reviewed before the scope is priced.
Does Rewiring During Renovation Affect the Cost?
Coordinating a rewire with wider renovation can make access easier because floors, ceilings or wall finishes may already be open. It can also allow socket positions, lighting points and fixed-equipment supplies to be agreed before final decoration.
The opposite can happen when rewiring is carried out in a fully finished and occupied property. More time may be needed to protect finishes, move around furniture and manage access without unnecessarily disrupting the rest of the home.
The electrical scope should still be agreed separately from general renovation work so that it is clear what the rewiring quotation includes.
How Much Does Occupying the Property Affect the Quote?
NICEIC identifies occupancy as one of the factors that can affect rewiring cost. Living in the property during the work requires additional planning and can make the project more difficult than rewiring an empty home.
The practical issue is not simply whether somebody can remain in the property. Contractors also need safe access to work areas and electrical circuits, and there will be periods when parts of the installation need to be isolated.
The separate guide to
living in a house during rewiring
deals with that question without duplicating it here.
Does a Full Rewire Include Testing and Certification?
Testing and completion documentation should be considered when comparing the overall scope rather than looking only at cable and accessory installation. Qualifying new electrical installation work requires appropriate inspection, testing and certification.
A full domestic rewire also involves Building Regulations considerations in England. GOV.UK's Approved Document P covers electrical safety in dwellings and explains the notification framework for relevant electrical work.
The certificate question is covered separately in
Do I Need a Certificate After a Rewire?
so that the cost article remains focused on quotation and budgeting.
How Should You Compare Two Rewiring Quotes?
Compare scope before price. Two totals are not directly comparable if one contractor has allowed for more sockets, different accessories, additional circuits or a different level of making good.
- Check that both quotations cover the same rooms and circuits.
- Compare the number and type of electrical points included.
- Confirm the consumer-unit scope and any associated protective devices.
- Check whether testing and electrical certification are included.
- Ask what building-finish work is excluded.
- Confirm whether the quotation is fixed for the stated scope or subject to identified conditions.
- Check how changes requested after work begins will be priced.
A detailed survey and written scope are more useful than relying on a generic price per bedroom. They give both the homeowner and electrician a clearer basis for agreeing what the final quotation actually covers.
References & Guidance
These sources support the cost factors and Building Regulations context used in this article.
Need an Accurate Rewiring Quote for Your Property?
The existing installation, access, property layout and proposed electrical points can be assessed before the full or partial rewiring scope is agreed.
Book a rewiring assessment