Hiring an electrician to rewire a house starts with finding out what the existing system needs, not simply asking for a price to replace cables. A proper assessment should cover the wiring, switchboard, earthing, outlets and the home’s expected electrical load. It should also clarify whether the work is partial, staged or a full rewire, and what repairs or certification are included. Before choosing an electrician, list how you use the house now and any planned upgrades, such as an induction cooktop, heat pump or EV charger. That gives the electrician a basis for setting a safe, useful scope and a more dependable quote.
“Rewire” can describe different amounts of work. Replacing wiring in one room is not the same project as replacing the fixed wiring throughout a house, and neither automatically includes a new switchboard, lights or wall repairs. Ask the electrician to describe exactly what they recommend and why.
| Approach | May suit | What to clarify | Main limitation |
|---|---|---|---|
| Partial rewire | A specific area or circuit has a fault or needs alteration, while the electrician considers the rest of the installation suitable to remain. | Which circuits and rooms are included, how they connect to existing wiring, and whether the remaining wiring has been assessed. | It leaves some existing wiring in service and may not solve broader capacity or condition concerns. |
| Full rewire | The wiring needs replacement across much of the house, or major renovation makes access to multiple areas practical. | Whether “full” includes every circuit, outlet and lighting point, and whether the switchboard, earthing or fittings are separate items. | It can require more access to walls, ceilings or floors, and does not necessarily include making good or decorating. |
| Staged rewire | The electrician confirms work can be divided into safe, clearly defined phases. | The sequence, what remains in service between phases, how each stage will be tested and documented, and how the final price may change. | Work may take place over more than one visit, and later stages can involve extra setup or repair work. |
The table is a starting point, not a diagnosis. A partial job can be sensible if the issue is genuinely limited; it is a poor substitute for addressing wiring that an electrician has identified as unsafe elsewhere. Likewise, “full rewire” should be defined in writing. Ask whether it covers the circuits and outlets you expect, and treat switchboard replacement, new light fittings and decorative repairs as separate until the quote says otherwise.
The electrician should inspect what can be safely accessed and ask about the house’s electrical history. They may need to look at the switchboard, outlets, switches, accessible cable routes and the way circuits serve different parts of the home. A visual check cannot reveal every condition hidden behind walls, so the quote should identify any assumptions and explain how concealed problems will be handled.
Tell the electrician about recurring breaker or fuse trips, damaged or unusually warm outlets, flickering lights, burning smells, or previous electrical repairs. These details help guide the assessment, but a symptom on its own does not prove that a full rewire is necessary. If you notice a burning smell, smoke or signs of overheating, don’t investigate by removing covers; keep clear and contact a qualified electrician promptly. If there is an immediate fire risk, use the appropriate emergency service.
Ask for the electrician’s findings in plain language. If replacement is recommended, find out whether the concern is damaged insulation, unsuitable or deteriorated wiring, inadequate circuit arrangements, changes to the home, or another issue. Ask which observations support the recommendation and whether any parts of the existing system can remain. You should understand the reason for the proposed scope before comparing prices.
A rewire is a good time to discuss whether the electrical supply and switchboard suit the household’s plans. Replacing cables does not, by itself, increase the capacity available to the property. The electrician may need to assess the existing switchboard, circuit protection, earthing and expected loads, then explain whether any changes are advisable or necessary for the proposed work.
Describe both current and likely future uses. That might include an EV charger, heat pump, electric hot-water system, induction cooking, a workshop, solar equipment or battery storage. You do not need to commit to installing everything now. But identifying likely additions can help the electrician consider circuit layouts, switchboard space and whether a future load assessment or coordination with the electricity network may be needed.
Ask for practical distinctions: what does the rewire make possible, what additional work would be needed for a planned appliance, and which decisions must be made now? Avoid paying for speculative extras without a clear reason, but don’t overlook a foreseeable need that would be disruptive to accommodate later. Any capacity conclusions should come from an assessment of the particular property, not a generic promise.
In New Zealand, use an appropriately licensed electrical worker for electrical work that requires one. Check the person’s current registration and practising licence through the Electrical Workers Registration Board (EWRB) public register, and confirm that the person responsible for the work is the one you have discussed the project with. A company name or general building qualification alone does not establish who will carry out or certify the electrical work.
Look for someone experienced with rewiring existing homes, not only new installations. Ask how they will assess concealed wiring, coordinate access and explain any changes to the agreed scope. For a substantial job, it is reasonable to ask for a written quote, evidence of appropriate insurance and examples of comparable work or references. Take time to check that the quote and the person you intend to hire match.
Ask these questions before accepting:
In New Zealand, ask the electrician which records and certificates apply to the work. Prescribed electrical work requires appropriate compliance documentation; depending on the work, this may include a Certificate of Compliance and an Electrical Safety Certificate, and high-risk work can have additional inspection requirements. Have the electrician explain what you will receive and keep those documents with the house records.
Two quotes are only meaningfully comparable when they describe similar work. A lower figure may exclude the switchboard, fittings, testing, access repairs or removal of old material, while another quote may include some of those items. If something is unclear, ask for a revised written scope rather than relying on a verbal assurance.
Check whether the quote separates fixed work from provisional or conditional items. Ask what could trigger an extra charge, how you will be notified, and whether work will stop until you approve the change. The cost of a rewire depends on the house and the agreed scope; relevant factors can include the number of circuits and outlets, the layout and construction, access to cable routes, switchboard work, fittings and repair responsibilities. There is no reliable single price that can be applied to every house.
Rewiring can require access to ceilings, floor spaces, walls or cupboards, depending on the house and the route chosen for cables. Before the start date, agree which areas need to be cleared, who will move heavy furniture and how pets or children will be kept away from work areas. Ask the electrician what parts of the home may have temporary power interruptions and how essential appliances or work-from-home needs can be managed.
Clarify who is responsible for making good after access holes are cut. Electrical work and plastering, painting, flooring or carpentry may be handled by different trades. If the electrician’s quote excludes those repairs, arrange them separately and check that the order of work is coordinated. If building materials suspected of containing asbestos are encountered, stop work in that area and ask for appropriate assessment before disturbing them.
For an occupied home, ask whether you will be able to stay there during each phase and what conditions might change that. The answer depends on the work area, access, power arrangements and the household’s needs. If a renovation is already planned, discuss timing with the builder and electrician early; open walls may make cable routes easier to reach, but trades still need a clear sequence and agreed responsibilities.
At completion, ask the electrician to explain what was replaced, what was retained and whether any recommended work remains outstanding. Confirm that the installed outlets, switches and fittings match the agreed plan, and ask how to operate any new controls or protective devices. Don’t treat a tidy appearance as proof that the work has been tested or documented.
Request the applicable compliance and safety documents, along with any test information or product details relevant to the work. Store them with renovation records, plans and appliance information; they can help with future electrical work or a property sale. If the electrician identifies a limitation or recommends follow-up work, ask what the issue means, whether it affects safe use and what action is needed.
There is no reliable age-only rule for deciding from a distance. The condition and arrangement of the wiring, the electrician’s inspection findings and your planned changes all matter. Ask for the reasons behind a full-rewire recommendation and which parts, if any, could safely remain.
No. The switchboard should be assessed as part of planning, but replacement or other switchboard work needs to be stated in the quote. Ask whether proposed changes relate to safety, the circuits being installed or additional capacity for future equipment.
Sometimes, but it depends on the extent of the work, access requirements and how power will be managed. Ask the electrician which areas may be unavailable, when interruptions are expected and whether any part of the project makes staying at home impractical.
It can be convenient to include them while electrical work is underway, but new fittings are not automatically part of a rewire. List the outlets, switches and lights you want changed and ask for those items to be priced and specified separately where appropriate.
Ask them to explain the finding, show you what can safely be shown, and describe the options and cost implications. Refer to the quote’s variation process and approve additional work in writing before it proceeds, except where immediate action is needed to manage a safety risk.
Keep the quote, approved variations and the electrical compliance documents that apply to the project. Ask the electrician to identify each document and explain any testing or inspection records provided, rather than assuming the same paperwork applies to every type of work.
The best electrician to rewire a house is one who first explains the condition of the existing installation, then gives you a clear scope covering wiring, switchboard considerations, future loads, access and handover. Check the electrician’s credentials, compare written quotes on like-for-like terms and agree on how unexpected work will be approved before the project begins.
