NAPIT registered · Member 84276 · Based in Catford SE607777 444 505 · info@avagelectrical.co.uk
November 2026 Special Offer

Book a House Rewire. Get 3 Wired Fire Alarms Included.

Planning a house rewire in London? Book your qualifying rewire this November and receive three wired fire alarms supplied and professionally installed at no additional charge.

Get an Initial Estimate Within a Few Hours

Send your postcode, property type and a few details about the work. We aim to respond with an initial estimate within a few hours during business hours. Final quotations are subject to assessment.

NAPIT Registered · Member 84276 · South East London

Get a House Rewiring Quote

Tell AVAG about your property and the electrical work you need. Request a quotation directly.

Does your property need rewiring?

Rewiring involves replacing or altering electrical circuits and cabling within a property. It can be appropriate where existing wiring is unsafe, deteriorated, unsuitable for its intended use or affected by substantial renovation work.

However, an older house does not automatically require a full rewire. A proper assessment should distinguish between defects affecting individual circuits and problems affecting much of the installation.

Before committing to a full rewire: Ask which findings justify the work, which circuits are affected and whether targeted repairs or partial rewiring are viable alternatives.

Signs that electrical wiring needs investigation

Damaged or deteriorating cables

Damaged insulation, exposed conductors or evidence of heat deterioration can create electrical risks. The extent of the problem determines whether individual circuits or larger sections need replacing.

Repeated electrical faults

Protective devices repeatedly operating, unreliable circuits or recurring faults may indicate problems with wiring or connected equipment. Fault-finding should establish the cause rather than assume the entire property needs rewiring.

Major property renovations

Renovating a kitchen, extending a property or changing room layouts can provide an opportunity to improve circuit arrangements, lighting and socket positions while access is available.

Unsatisfactory inspection findings

An EICR can identify defects requiring investigation or remedial work. The report should be interpreted carefully; an unsatisfactory result does not automatically mean every cable must be replaced.

Full rewiring versus partial rewiring

Full property rewire

A full rewire generally involves replacing the fixed wiring for the agreed circuits throughout a property. It can be disruptive because cables and electrical accessories may need access through floors, walls and ceilings.

Partial rewire

Partial rewiring focuses on a defined section of the electrical installation, such as a kitchen, extension or defective circuit. The remaining installation must still be suitable for safe continued use.

Either option may require changes to the consumer unit, protective devices or earthing and bonding arrangements, depending on the installation. These should be assessed and priced as part of the agreed scope.

What happens during a house rewire?

  1. Initial assessment: Inspect the existing installation, discuss electrical requirements and identify the circuits to be replaced.
  2. Design and planning: Agree locations for switches, sockets, lighting, appliances and any new circuits before work begins.
  3. First fix: Install cables and associated equipment where access is available, including any necessary chasing or lifting of floorboards.
  4. Second fix: Connect sockets, switches, lighting points and other electrical accessories once the building work allows.
  5. Inspection and testing: Inspect and test the completed work before returning the relevant circuits to service.
  6. Handover: Supply appropriate electrical certification and explain the installed circuits and protective devices.

The exact sequence will depend on whether the property is occupied, the extent of refurbishment and the building's construction.

How disruptive is rewiring?

Accessing concealed cable routes can involve lifting floorboards, opening parts of walls or ceilings and temporarily moving furniture. The level of disruption depends heavily on the property and whether it is already being renovated.

Plastering, decorating, flooring repairs and making good should be discussed before accepting a quotation. Do not assume these tasks are included in the electrical contractor's price unless clearly specified.

Occupied homes may require phased work or planned interruptions to power. Where people rely on electrically powered medical or other essential equipment, this must be discussed before scheduling any isolation.

What affects the cost of rewiring?

Property size alone does not determine the quotation. The number of circuits, sockets and lighting points, available cable routes, wall and floor construction, occupancy and access restrictions all affect the labour involved.

The choice of electrical accessories, consumer unit work, additional circuits and any required remedial work can also change the final cost.

When comparing quotes, request a clear breakdown of what is included, whether testing and certification are covered, how variations are handled, and who is responsible for making good after installation.

Electrical certification after rewiring

A rewire should be inspected and tested, with the appropriate Electrical Installation Certificate and associated test schedules supplied for the completed installation work.

In England, the Building Regulations Part P notification requirements depend on the nature and location of the electrical work. A full rewire will ordinarily involve notifiable work. Ask the contractor how any necessary Building Regulations compliance notification will be handled.

Retain electrical certificates with the property's records. They may be useful for later inspections, alterations, sale or rental of the property.

Frequently asked questions about house rewiring

Does a house need rewiring because it is over 30 years old?

No fixed property age automatically establishes that a full rewire is necessary. The condition, safety and suitability of the existing electrical installation matter more than age alone.

Can you rewire just one room?

Yes, partial rewiring can be appropriate where the work has a clearly defined scope and the remaining installation is suitable. An electrician should assess how the altered circuits connect to the existing installation.

Will rewiring damage plaster and flooring?

Some access work may be necessary, particularly where cables are concealed. The extent of chasing, lifting floors and making good should be established before work begins.

Does a house rewire require a new consumer unit?

Not automatically. The existing consumer unit must be assessed for suitability, capacity and protective arrangements. Replacement may be necessary in some installations.

Can I stay in the property during rewiring?

It may be possible, depending on the extent of work, safe access and electrical isolation arrangements. Occupied rewires require careful planning and can involve significant disruption.

Should I receive an electrical certificate?

Yes. Appropriate inspection, testing and electrical certification should form part of the completed rewiring work.

Discuss a house rewiring project

Tell AVAG Electrical about the property, its current wiring, planned renovations and any known defects. This allows the scope and practical requirements to be discussed before arranging work.

Contact AVAG Electrical

Planning a property rewire

A rewire may involve access to floors, walls and ceilings. Discuss socket positions, lighting requirements, planned renovations and the condition of the existing installation before deciding the extent of work.

Related electrical services

NAPIT registeredMember 84276
NVQ Level 3Main electrical qualification
Clear guide pricesScope agreed first
Direct contactSpeak to AVAG

About House Rewiring

Full and partial rewiring for older homes, renovations, extensions and properties where the existing wiring is unsuitable for the intended use. A rewire should be based on actual condition, design requirements and test findings. Age alone does not prove that every cable needs replacing, while heavy alterations or poor previous work can make a younger installation unsuitable.

Recent work

Electrical cable installation during property rewiring
Cable installation
Open consumer unit showing circuit wiring during installation
New circuit wiring

Price guidance

Rewiring is survey-priced rather than sold from a single website figure because property size, occupancy, finishes, circuit design, accessory count, access and making-good requirements change the scope significantly. AVAG confirms a quotation after understanding the installation and proposed layout.

Planning and assessment

Testing is not an optional finishing touch. Polarity, continuity, insulation resistance and other measurements or functional checks are selected to suit the work and installation so that the result is verified rather than assumed. The relevant circuit protection has to suit the circuit and the work being carried out. RCD or RCBO protection, protective-device ratings and disconnection arrangements cannot be selected by appearance alone. Existing installations do not automatically have to be rebuilt simply because they were installed to an earlier standard. The important question is whether the relevant existing equipment and protective arrangements are safe and adequate for the current circumstances and any new work. Cable routes and conductor sizes need to match the design conditions. Concealed cables, thermal insulation, grouped circuits, long runs and the expected load can all influence what is suitable. Earthing and protective bonding are part of the safety picture. New or altered work may depend on existing arrangements being adequate, so an electrician cannot responsibly ignore them where they are relevant to the proposed work.

A typical house rewiring enquiry in London starts with the postcode, property type and a short description of what you need. Photographs can be useful for an initial discussion, but they do not replace inspection or testing where the condition of the installation matters. AVAG then confirms whether the next step should be a quotation visit, a diagnostic attendance or a defined piece of work. Before starting, the scope and likely price are agreed. During the work, anything materially different from what was expected is explained before additional work is undertaken. On completion, the installation or alteration is checked and a completed rewire requires inspection and testing and normally an electrical installation certificate. building regulations notification requirements are separate and depend on the work.

Certification and records

A completed rewire requires inspection and testing and normally an Electrical Installation Certificate. Building Regulations notification requirements are separate and depend on the work.

Choose your area

These are not duplicate doorway links: each local page contains its own property context, service planning, pricing guidance, FAQs and nearby-area links so users can browse the hierarchy by service and location.

House rewiring: practical considerations

A professional house rewiring quotation should make the scope understandable. The customer should know whether inspection, testing, standard materials, certification and making-safe work are included, and which items are subject to further assessment. That is particularly important when existing wiring is concealed and its condition cannot be established from photographs.

Electrical work should be designed around current use and foreseeable demand. Kitchens, heating equipment, home offices, extensions, garden buildings and vehicle charging can materially change how a property uses electricity. Even when only one job is being carried out, considering future requirements can avoid unnecessary rework.

Standards change over time. An existing installation is not automatically dangerous because it was installed to an earlier edition, and a new-looking accessory is not proof that the circuit behind it is satisfactory. Inspection, testing and the circumstances of the proposed work are what allow a competent electrician to make a reasoned assessment.

Customers should keep electrical certificates and reports with the property records. They help future electricians understand alterations, provide evidence of work carried out and reduce uncertainty when the property is sold, let or renovated later.

Where a job uncovers an unexpected defect, the correct response is to explain the finding and agree the safe next step. Concealed damage, borrowed neutrals, poor previous alterations and inaccessible junctions are examples of conditions that may not be visible until testing or access begins.

Customer guide

What to know before booking

Practical information for planning electrical work without turning the website into DIY instructions.

How to prepare for the visit

Make the consumer unit and relevant work areas accessible where possible. If the fault is intermittent, note what was running and when the problem happened. For planned work, prepare a list of required points and priorities. Good information reduces guesswork and helps the electrician use site time effectively.

Comparing quotations properly

Compare what is included, not only the final number. Check whether testing, certification, labour assumptions and materials are identified. A quotation that appears cheaper may simply exclude work that another contractor has included from the outset.

What photographs can and cannot show

Photos can show the type of consumer unit, visible accessories, room layout and obvious damage. They cannot prove insulation resistance, continuity, polarity or the condition of concealed cables. Treat photographs as a scoping tool rather than a substitute for testing.

After the work

Keep the invoice, report or certificate with the property records. If labels or circuit schedules have been updated, avoid removing them. Clear records make later maintenance easier and give future electricians useful context.

Safety first

Do not remove covers, expose live parts or attempt mains electrical testing to collect information for a quotation. If there is smoke, heat, arcing or an immediate danger, isolate the supply only if it is safe to do so and seek urgent professional assistance.

Questions worth asking about house rewiring

Ask what part of the existing installation the new work depends on, what testing will be carried out and which certificate or record will be supplied. Ask what assumptions the quotation makes about access and concealed wiring. These questions reveal far more about the quality of the proposed work than a list of product brands.

It is also reasonable to ask what happens if testing identifies an unrelated defect. A clear contractor will distinguish between work that is necessary to complete the agreed job safely and improvement work that can be considered separately.

Why property-specific assessment matters

Two properties of the same size can require different electrical work because circuit arrangements, earthing, previous alterations, access and intended use differ. That is why AVAG uses published guide prices where a service can sensibly be standardised and survey-based quotations where it cannot.

The goal is to give enough information for a customer to make a decision without pretending that a website can diagnose concealed electrical conditions.

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Tell AVAG what electrical work you need.

Send the postcode, property type, a short description and photographs where useful.

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