A full rewire is one of the more disruptive improvements you can make to a property, so it is sensible to ask: how long does rewiring take? The honest answer is that it depends on the size, age and condition of the building, as well as whether it is occupied while work takes place. Clear planning and an experienced electrical contractor make a significant difference to both the programme and the finish.
For a typical three-bedroom house, a full rewire commonly takes around five to ten working days when the property is empty and ready for work. In an occupied home, the same project may take two to three weeks, sometimes longer, because electricians need to work around furniture, daily routines and safe access to each area.
How long does rewiring take in different properties?
There is no single timescale that suits every building. A small flat with straightforward access may be rewired in three to five days. A larger detached home, a period property or a house with several extensions can take two weeks or more.
Commercial and industrial rewires need their own assessment. A small office refurbishment may be completed in stages over a week or two, while a retail unit, warehouse or operational workplace may require phased work outside normal trading hours. The priority is often to keep essential services running safely while reducing downtime for staff, customers and operations.
The figures above apply to a full rewire, where old circuits and cabling are replaced and new wiring is installed throughout. Smaller upgrades, such as a new consumer unit, additional sockets or a kitchen circuit, are much quicker jobs and should not be compared directly with a whole-property rewire.
What happens during a full rewire?
A rewire is more than changing a consumer unit. It usually involves installing new cables for lighting, socket outlets, cooker supplies, smoke alarms, extractors and any fixed equipment that requires its own circuit. The electrician may also install new switches, sockets, light fittings and a modern consumer unit with appropriate protective devices.
The work generally follows four stages:
- Survey and design: The property is inspected, requirements are discussed and the electrical installation is planned.
- First fix: Old wiring is disconnected where appropriate, routes are prepared and new cables and back boxes are installed before walls are finished.
- Second fix: Accessories, fittings, the consumer unit and final connections are installed once decorating, plastering or other building work is ready.
- Testing and certification: The completed installation is inspected and tested before certification is issued.
In some homes, first and second fix can follow each other closely. In a renovation, there may be a longer gap while plastering, joinery, kitchens or other trades complete their work. That gap does not necessarily mean the electrical work itself is taking longer, but it can extend the overall project programme.
The factors that can extend the schedule
The condition of the property is often the biggest unknown. Older homes can contain hidden issues such as unsuitable cable routes, damaged plaster, unexpected wiring alterations or limited access beneath floors and within walls. A thorough survey helps identify likely challenges, but some details only become visible once work starts.
Access also matters. An empty property allows the team to move efficiently from room to room, lift floorboards where needed and make good progress without repeatedly moving belongings. In a furnished, lived-in home, each area needs protecting and clearing before work can begin. Power may also need to be isolated for periods, which requires careful coordination.
The number of rooms and the electrical specification will influence the duration. A house with a home office, electric heating controls, multiple bathrooms, garden supplies, an outbuilding, an EV charger or solar equipment will usually need more circuits and more planning than a basic installation. Extra sockets, feature lighting, data cabling and smart controls can all add time, particularly where design decisions are still being made during the work.
Finishing requirements should be discussed early. Electricians will normally make safe and practical openings to run cables, but making good plaster, redecorating and replacing specialist finishes may be handled separately unless included in the agreed scope. Agreeing who is responsible for each element avoids surprises at the end of the project.
Can you stay in the house during rewiring?
It is possible to remain at home during a rewire, but it is not always comfortable. There will be dust, noise, lifted floor coverings, temporary loss of power and limited use of particular rooms. Kitchens, bathrooms and bedrooms can all be affected at different points.
For some households, particularly those with young children, people working from home or anyone who relies on electrical medical equipment, staying elsewhere during the main first-fix period may be the better option. If moving out is not practical, a contractor can often plan the work in zones so that parts of the property remain usable. This is slower than working in an empty house, but it can reduce the impact on everyday life.
Before work begins, remove valuable items and clear furniture away from walls where possible. Ask which rooms will be worked on first, when electricity will be unavailable and whether any floor coverings need to be lifted. Small preparations can prevent delays and help the team protect your home properly.
How to keep a rewire on programme
A detailed discussion before the start date is the best way to avoid unnecessary changes. Decide where you want sockets, switches, lights, appliances, charging points and network connections before cables are installed. It is much easier, and usually less costly, to make these choices at the design stage than after walls have been opened.
If other trades are involved, coordinate their schedules. Kitchen installers, plasterers, decorators, heating engineers and flooring contractors all have points where their work interacts with the electrical installation. A clear order of work keeps the project moving and reduces the risk of completed surfaces being disturbed again.
It is also worth allowing a sensible contingency in your wider renovation plan. Most rewires proceed smoothly when the property is ready, but no responsible contractor should promise an exact completion date before the full scope and site conditions are understood. Good communication matters more than an unrealistic timescale.
Testing, certification and a safe handover
A rewire is only complete when the installation has been tested and the necessary documentation has been provided. Testing confirms that circuits are correctly connected, protective devices operate as intended and the installation meets the relevant requirements.
For domestic electrical work, homeowners should receive an Electrical Installation Certificate for a full rewire. Where work is notifiable under Building Regulations, the relevant compliance documentation should also be provided. Keep these records safely, as they are useful for future maintenance, insurance queries and when selling the property.
A professional handover should also explain the consumer unit, circuit labels and any equipment that needs routine attention. If you are unsure how a circuit, isolator or protective device works, ask before the team leaves. Clear information is part of a quality installation, not an afterthought.
When a partial rewire may be enough
Not every older property needs a complete rewire. If testing shows that some circuits remain safe and suitable, a partial rewire or targeted upgrade may be appropriate. This can reduce disruption and cost, but it should be based on the condition of the existing installation rather than assumptions about its age alone.
Conversely, repeatedly adding new circuits to a poor or outdated installation can become false economy. If wiring is deteriorated, poorly altered or unable to support modern demand safely, a full rewire can provide a more dependable long-term solution.
The most useful starting point is an on-site assessment. Once the property, existing installation and intended use have been considered, you can have a realistic conversation about timescales, disruption and the work needed to leave your electrical system safe, practical and ready for the years ahead.