A house rewire is one of the most significant pieces of electrical work a property can undergo. It involves replacing the fixed wiring throughout the home — from the consumer unit to every socket, switch, and light fitting. It is disruptive, but when it is needed, it is one of the most important investments you can make in the safety and long-term value of your property.
Here is how to tell if your home needs rewiring, what the process involves, and what it is likely to cost.
Signs Your House May Need Rewiring
Electrical wiring does not last forever. The cables, connections, and insulation degrade over time, and older materials can become a genuine safety risk. Here are the most common warning signs:
Old rubber or fabric-insulated cables
If your wiring has rubber or fabric insulation rather than modern PVC, it was likely installed before the 1960s. These materials become brittle and can crack or crumble, exposing live conductors. This is one of the clearest indicators that a full rewire is overdue.
Round-pin sockets
Round-pin sockets were standard in the UK before the rectangular three-pin design became the norm in the 1950s and 1960s. If your home still has round-pin sockets, the wiring behind them is almost certainly original and well past its intended lifespan.
No earth wire
Very old installations may lack an earth conductor altogether. Without a proper earth path, there is no safe route for fault current, which significantly increases the risk of electric shock. An EICR inspection will identify this immediately.
Frequent tripping or blown fuses
While occasional tripping is normal, persistent problems often point to deteriorating wiring, loose connections, or insulation breakdown. If your electrician keeps finding faults in different parts of the house, the underlying wiring may be the common factor.
Burning smells, scorch marks, or warm sockets
Any of these are urgent warning signs. They typically indicate loose connections, overloaded circuits, or failing insulation — all of which can lead to electrical fires. If you notice any of these, have the installation inspected without delay.
No RCD protection
If your consumer unit does not include Residual Current Devices (RCDs), your home lacks a critical layer of protection against electric shock and electrical fires. While a consumer unit upgrade can add RCD protection, if the wiring itself is in poor condition, a consumer unit change alone may not be sufficient.
What Does a Rewire Involve?
A full house rewire replaces all the fixed wiring in the property. The work is carried out in two main phases:
First fix
This is the main installation phase. It involves lifting floorboards and chasing walls to route new cables throughout the property. New cable runs are installed from the consumer unit to every socket, switch, and light position. Back boxes for sockets and switches are fitted, and cables are left ready for connection. This phase is the most disruptive, as it requires access to floors, walls, and ceilings throughout the home.
Second fix
Once any plastering and decorating has been completed around the new cable routes, the second fix takes place. This involves fitting the face plates on sockets and switches, connecting light fittings, installing the new consumer unit, and carrying out full testing and certification. The second fix is far less disruptive than the first.
Making good
A rewire inevitably involves some disruption to plaster, floorboards, and decoration. Making good — replastering chased walls, refitting floorboards, and basic redecoration around affected areas — can be included as part of the work or left for your decorator. We always discuss this upfront so you know exactly what to expect.
How Long Does a Rewire Take?
The duration depends on the size of the property and the scope of the work:
- 2-bedroom flat or terrace — typically 4 to 6 days
- 3-bedroom semi-detached — typically 5 to 8 days
- 4-5 bedroom detached — typically 8 to 12 days
- Larger or period properties — can take 2 to 3 weeks depending on complexity
These timescales cover the first and second fix electrical work. If making good and replastering is included, it may add a day or two. It is often most practical to arrange the rewire alongside other renovation work, so the disruption happens once rather than twice.
Partial vs Full Rewire
Not every property needs a complete rewire. In some cases, a partial rewire is the more practical option:
- Full rewire — all fixed wiring is replaced throughout the property. This is the right approach when the existing wiring is uniformly old or in poor condition
- Partial rewire — only specific circuits or areas are replaced. This may be appropriate if part of the house has been previously rewired and is in good condition, while other areas have older wiring that needs attention
An EICR is the best way to determine the condition of your wiring and whether a full or partial rewire is the right approach. We will always give you an honest assessment — if a partial rewire will resolve the issues, there is no need to do more than necessary.
Typical Costs by House Size
Rewiring costs vary depending on the property size, the number of circuits, accessibility, and whether making good is included. Here are typical price ranges for domestic properties in Essex and Suffolk:
These prices typically include a new consumer unit, all wiring, sockets, switches (standard white), and testing and certification. Upgraded finishes — such as brushed chrome or antique brass socket and switch plates — are available at additional cost. Making good is usually quoted separately, as it depends on the level of finish required.
Combining a Rewire With Other Work
A rewire is an ideal time to carry out other electrical improvements, as the infrastructure is already being replaced. Common additions include:
- Consumer unit upgrade — this is included as standard in a full rewire, ensuring your new installation has proper RCD and MCB protection
- EICR — a condition report on your new installation is issued as part of the certification process
- Additional sockets and circuits — adding extra sockets, USB charging points, or dedicated circuits for appliances is simple while the cables are being run
- Lighting design — upgrading to LED downlights, adding dimming circuits, or improving the lighting layout costs very little extra during a rewire
- Smart home preparation — running neutral wires to switch positions, installing smart lighting circuits, or adding ethernet cabling alongside the electrical wiring
If you are planning a rewire, it is worth thinking about what else you might want to include. It is always cheaper and easier to do it at the same time.
Is It Worth It?
A rewire is a significant investment, but it provides decades of safe, reliable electrical infrastructure. It eliminates the fire and shock risks associated with aging wiring, brings your property into compliance with current regulations, and can add real value if you are planning to sell. Most importantly, it gives you confidence that your home's electrical system is safe for your family.