A house can look well cared for at a viewing and still have electrical work hiding behind every wall, under the stairs or in the loft. This buying house electrical checklist will help you spot warning signs early, ask useful questions and decide whether you need an electrician’s advice before committing to the purchase.
The electrical installation is rarely tested as part of a standard mortgage valuation. A survey may identify obvious defects, but it will not usually confirm that the wiring is safe, compliant or suitable for modern use. That is why electrical checks deserve proper attention before you exchange contracts, particularly in older Plymouth, Devon and Cornwall properties where installations may have been altered over several decades.
Buying house electrical checklist: start with the paperwork
Ask the seller or estate agent for the most recent Electrical Installation Condition Report, often called an EICR. This is the clearest available record of the condition of the fixed wiring, consumer unit, sockets, switches and other parts of the installation. For a home purchase, an EICR is not always legally required, but it can provide valuable reassurance and identify work that should be budgeted for.
Check the report date, its observations and the overall outcome. A satisfactory report is helpful, although it does not guarantee that nothing will ever fail. If the report records C1 or C2 observations, these indicate danger or potentially dangerous conditions requiring urgent remedial work. FI observations mean further investigation is needed. Do not assume these are minor points simply because the property is occupied.
Also ask for electrical installation certificates, minor works certificates and building control paperwork for significant alterations. Useful examples include a replacement consumer unit, new circuits, a kitchen extension, loft conversion, shower circuit, solar PV system or electric vehicle charger. Certificates show that work was tested when completed and, where applicable, notified correctly.
1. Look at the consumer unit
The consumer unit, sometimes still referred to as a fuse board, offers a quick indication of the installation’s age and standard. A modern metal unit with clearly labelled circuits and RCD protection is generally a positive sign. RCDs are safety devices designed to disconnect power rapidly if they detect an earth fault, reducing the risk of electric shock and fire.
Older rewireable fuses, wooden-backed boards, damaged covers, missing blanks or untidy additions should prompt further investigation. Age alone does not prove a unit is unsafe, but an old board may not provide the protection expected for a modern household. It can also make future additions, such as an EV charger or induction hob, more complicated and costly.
Do not remove covers or touch internal components during a viewing. Instead, photograph the outside where permitted and ask a qualified electrician to assess it.
2. Check whether there is RCD protection
Look for test buttons marked “T” or “Test” on the consumer unit. Their presence often indicates RCD or RCBO protection, but the arrangement matters. Some older installations have limited RCD coverage, leaving certain circuits without modern additional protection.
Ask which circuits are protected and whether the seller tests the devices regularly. A test button is not a full inspection, and you should not rely on a seller’s answer as evidence of electrical safety. It is simply a sensible question that may reveal whether the installation has been maintained responsibly.
3. Count sockets where you will actually use them
Walk through each room with everyday use in mind. Are there enough sockets for bedside lamps, televisions, broadband equipment, desks and kitchen appliances without relying on extension leads? A shortage of outlets is not necessarily a safety defect, but overloaded adaptors and trailing leads can become one.
Pay particular attention to the kitchen, utility room and home office. Modern households often need more capacity than the original layout allowed. Additional sockets can be straightforward in some properties, but work becomes more involved where walls are solid, finishes are high-end or circuits are already heavily loaded.
4. Inspect sockets, switches and light fittings
Look for cracked faceplates, loose sockets, scorch marks, buzzing switches, exposed cable, missing fittings or signs of overheating. These are not cosmetic issues to ignore. They may point to damaged accessories, poor connections or unsuitable DIY alterations.
Note whether lighting is adequate in stairways, halls, outside entrances and parking areas. Replacing a fitting is normally simple, but inadequate external lighting, poorly positioned switches or a lack of smoke alarms may form part of a wider improvement plan once you move in.
5. Ask about rewiring and past alterations
A seller may say the property has been “rewired”, but that phrase can mean anything from a complete new installation to a few circuits being replaced during renovation. Ask when the work was done, who completed it and whether certificates are available.
A full rewire usually involves new cabling throughout, a new consumer unit and testing. Partial rewiring can be perfectly appropriate, but it may leave a mixture of old and new wiring. The condition, capacity and protection arrangements need to be considered as a whole.
Be cautious if cables appear surface-run in unexpected places, sockets are at inconsistent heights, or extensions have been added with no paperwork. These details do not automatically mean the work is unsafe, but they justify a professional inspection.
6. Check the kitchen and bathroom carefully
Kitchens and bathrooms place greater demands on an electrical installation. In the kitchen, establish whether high-load appliances have dedicated circuits where needed, including electric ovens, hobs and possibly a dishwasher or washing machine. If you plan to replace a gas cooker with an induction hob, the existing supply may not have enough capacity.
In bathrooms, look for suitable lighting, extractor fans and correctly positioned electrical accessories. Electrical work in bathrooms is subject to specific safety requirements because of the increased risk from water. A fan that does not run, a poorly fitted shower isolation switch or a socket too close to a basin should be assessed rather than dismissed.
7. Find out how the property is heated
Electric heating, immersion heaters, underfloor heating and electric showers can place substantial demand on the supply. Ask what is installed, how old it is and whether the current occupants experience tripping or reduced performance when several appliances are in use.
This is especially relevant if you are planning an EV charger, heat pump, solar battery or major kitchen upgrade. The electricity supply and consumer unit may need upgrading before these additions can be installed safely. It is better to understand that cost before purchase than after your moving budget is already stretched.
8. Review lofts, garages, gardens and outbuildings
These areas are often where unsuitable additions appear. Look for cables draped across joists, unprotected wiring, damaged outdoor fittings, improvised connections or a garage supplied by a lead through a window. Outbuildings should have suitable circuits, isolation and protection, particularly if you want to use them as a workshop, office or gym.
External power and lighting deserve the same care. Garden sockets, ponds, hot tubs and sheds all need appropriate equipment for their location. Water ingress and ageing cable insulation can turn an apparently useful feature into a remedial job.
9. Check smoke and heat alarms
Ask whether alarms are mains-powered, interlinked and regularly tested. Requirements vary depending on the property type and location, but reliable detection is a basic safety priority in any home. Battery-only alarms may be adequate in some situations, yet an older property with no coordinated alarm coverage is worth improving promptly.
If you are buying a flat, also ask about communal fire systems and any electrical responsibilities within shared areas.
10. Consider the incoming supply and meter position
Take note of where the electricity meter and main isolator are located. Are they accessible, dry and free from clutter? Older properties may have limited supply capacity, awkward meter locations or service equipment that needs attention before major electrical work can proceed.
Only the network operator can alter certain parts of the incoming supply, so these jobs can involve additional lead times and costs. An electrician can advise on the likely requirements, but should not interfere with sealed supplier equipment.
11. Watch for signs of faults during viewings
You may not be able to test the installation yourself, but you can ask the seller to demonstrate fixed equipment. Notice lights flickering, circuits tripping, warm accessories, burning smells or appliances that repeatedly lose power. Record what you see and raise it through your solicitor or surveyor.
A single failed lamp may be nothing more than a bulb. Repeated tripping or overheating is different. Electrical faults should be investigated by a competent electrician, not treated as a negotiating detail to revisit after completion.
12. Budget for safety before cosmetic upgrades
If the property needs electrical work, obtain a clear written quotation based on an inspection where possible. A consumer unit replacement, remedial work or rewire should be planned around the property’s actual condition, not guessed from photographs. Costs depend on access, the number of circuits, wall construction, finishes and whether other renovation work is taking place.
Where several improvements are needed, safety-critical work comes first. It may be sensible to combine rewiring with a kitchen refit, extension or decorating programme to reduce disruption later. On the other hand, replacing a consumer unit before confirming the condition of older wiring is not always the right answer. A proper assessment helps you spend in the right order.
When to arrange an electrical inspection before exchange
Consider arranging an EICR or pre-purchase electrical inspection if the home is older, has no recent certificates, shows signs of DIY work or is being bought as a rental investment. It is also sensible where you plan significant electrical changes soon after moving in.
For buyers in Plymouth and the surrounding area, Goodwin Electrical can assess an installation, explain findings in plain English and provide a transparent quotation for any recommended work. The aim is not to create unnecessary expense, but to give you a clear view of the property you are buying.
A home purchase always involves compromise, but uncertainty about electrical safety should not be one of them. Ask for the evidence, take visible warning signs seriously and get qualified advice early enough to make a confident decision.