If you have just been told your property needs a rewire, the first question is usually not about cable types or regulations. It is much simpler – how long does rewiring take, and how disruptive is it going to be?
The honest answer is that rewiring timescales vary. A small flat may take only a few days, while a larger lived-in house or older commercial unit can take considerably longer. The size of the property matters, but so do access, wall construction, occupancy, the condition of the existing installation, and whether the work is a full rewire or only a partial upgrade.
For most homes, a full rewire usually takes between 5 and 10 working days. That is a useful starting point, but it is only a starting point. If you are planning work in Plymouth or the wider Devon and Cornwall area, the best timescale is always one based on a proper inspection rather than a rough guess.
How long does rewiring take in a typical property?
A one-bedroom flat can often be rewired in around 3 to 5 working days if access is straightforward and the property is empty. A two or three-bedroom house is more commonly in the 5 to 8 day range. Larger four-bedroom homes can take 7 to 14 working days, particularly where there are more circuits, more accessories, and more making-good work afterwards.
Commercial rewiring is different again. A small office or shop unit may be completed fairly quickly, but timescales depend heavily on trading hours, equipment shutdown requirements, ceiling void access, fire stopping, emergency lighting, and whether work has to be phased to keep the business operating.
It is also worth separating electrical work from the full project timeline. The rewiring itself may be finished within a week or two, but plastering, decorating, flooring reinstatement, and final snagging can extend the overall programme.
What affects how long a rewire takes?
Property size is the obvious factor, but it is not the only one. In practice, the layout and condition of the building often matter just as much.
An empty property is usually much quicker to rewire than an occupied one. When rooms are full of furniture, carpets need protecting, and power has to be restored safely at the end of each day, progress naturally slows. If the occupants are staying in the home during the works, the electrician also has to plan around access, dust control, and day-to-day use of essentials.
The age of the building can add time as well. Older properties may have solid walls rather than plasterboard partitions, limited cable routes, or evidence of previous alterations that need to be traced and corrected. In some cases, what appears to be a straightforward rewire becomes a wider rectification job once hidden issues are uncovered.
Specification matters too. A standard rewire with sensible socket and lighting points is one thing. If you are also adding exterior lighting, EV charging provision, extra data cabling, smoke alarms, electric heating controls, or a consumer unit upgrade, the job becomes more involved.
Full rewire or partial rewire?
When people ask how long does rewiring take, they are often not sure whether they actually need a full rewire. That distinction changes both the cost and the duration.
A full rewire normally means replacing the main circuits, installing new cabling, updating sockets and switches, fitting or upgrading the consumer unit, and testing the entire installation to current standards. This is the more disruptive option, but it gives the clearest long-term result.
A partial rewire focuses on specific circuits or areas. For example, you might rewire a kitchen extension, replace damaged lighting circuits, or upgrade parts of an older installation while other compliant sections remain in place. This can reduce downtime, but it only works where the existing system is suitable to integrate with new work. If the installation is in poor condition overall, piecemeal upgrades may only delay the inevitable.
A proper inspection is the only sensible way to decide. An EICR can often highlight whether targeted remedial work is enough or whether a full rewire is the safer and more cost-effective route.
What happens during a rewire?
Understanding the sequence helps explain the timescale. A rewire is not just a matter of pulling out old cables and dropping in new ones.
The first stage is planning. Circuits are designed around how the property is actually used, not just where old accessories happen to be. This includes deciding on socket positions, lighting arrangements, extractor fans, cooker supplies, smoke detection, and any specialist requirements.
The first fix stage comes next. This is where cables are run through walls, floors, ceilings, and voids, and back boxes are installed. In many properties, this is the messiest part because floorboards may need lifting and channels may need chasing into walls.
Once first fix is complete, any plastering or making-good work can be carried out. The second fix stage follows, with sockets, switches, light fittings, and the consumer unit connected and fitted. Finally, the installation is inspected, tested, and certified.
That final testing stage is not an optional extra. It is a critical part of safe electrical work and one reason qualified contractors do not rush a job for the sake of an unrealistic deadline.
How disruptive is rewiring?
Rewiring is one of the more disruptive electrical jobs you can do in a property. There is usually some dust, noise, and temporary loss of power. Furniture often needs moving, wall finishes may be disturbed, and access is needed to most rooms.
That said, disruption can be managed well. Clear planning makes a substantial difference. If the property is empty, the work is generally faster and simpler. If it is occupied, a phased approach may help, with priority circuits kept live where safe to do so and rooms tackled in a practical order.
Customers are often most concerned about kitchens, home working spaces, and bedrooms for children. These are reasonable concerns, and a good contractor will talk through them before work starts rather than leaving the details vague.
How to keep the project moving
A rewire can lose time for avoidable reasons. The quickest projects are usually the ones that are well prepared before the first tool comes out.
If possible, decide early on where you want sockets, switches, lighting points, and any additional extras. Last-minute changes are one of the most common causes of delay. Clearing access to walls, lofts, and floor areas also helps the team work efficiently and safely.
If other trades are involved, the order matters. Plasterers, decorators, kitchen fitters, and flooring contractors all need to work around the electrical programme. Poor coordination can add days very easily.
It also helps to choose a contractor who gives realistic timescales rather than optimistic ones. A sensible schedule that allows for testing, certification, and tidy finishing is far better than a rushed promise that leads to disruption dragging on.
Signs the work may take longer than expected
There are a few situations where rewiring commonly overruns the initial estimate. One is hidden damage or unsafe previous work discovered once floors and walls are opened up. Another is restricted access, especially in older buildings with difficult loft spaces or solid construction throughout.
Customer changes can also extend the programme. Adding downlights, moving socket positions, changing the kitchen layout, or upgrading the specification mid-project all have an effect. None of these are wrong decisions, but they do need to be factored in honestly.
Commercial properties bring their own delays if work has to happen outside trading hours or in carefully controlled phases. In those cases, the calendar duration may be longer even if the total labour time is similar.
Is it worth moving out during a rewire?
If you are having a full rewire done, moving out temporarily is often worth considering. It is not essential in every case, but an empty property is easier, faster, and usually cheaper to complete. It also avoids the inconvenience of living with lifted floors, patch repairs, and intermittent power.
For landlords preparing a property between tenancies, this is often the ideal window. For homeowners, it depends on the scale of the work and whether alternative accommodation is realistic. If staying put is the only option, the key is to agree a practical working plan at the start.
Getting the right answer for your property
Online estimates are useful for ballpark planning, but they are no substitute for seeing the property. Two houses of the same size can have very different rewiring timescales depending on age, layout, condition, and what the client wants to achieve.
That is why experienced contractors start with a proper assessment, explain the likely disruption, and set out what is included. For homeowners, landlords, and businesses, that clarity matters just as much as the timescale itself.
If you are weighing up a rewire, think less about the fastest possible number and more about getting the job done safely, neatly, and to current standards. A well-planned rewire may take a little time, but it leaves you with the confidence that the installation is fit for modern use and built to last.