Old wiring has a habit of revealing itself at the worst time
Outdated wiring doesn’t usually announce itself. It waits. Then a fuse blows, a socket runs hot, or a surveyor raises an eyebrow that says more than a paragraph ever could. Insurers notice too, because electrical faults sit high on the list of fire causes.
Once a property is known to have older electrics, underwriting tends to slow down and ask better questions.

What insurers usually mean by outdated wiring
This isn’t about style. It’s about standards and materials that no longer meet modern expectations.
- Rubber or fabric-insulated cabling
- Aluminium wiring in parts of the system
- Old-style fuse boards without modern protection
- Mixed wiring from multiple partial upgrades
- Installations that haven’t been inspected for many years
Age alone isn’t decisive. Condition and safety are.
Why insurers focus so closely on electrics
Electrical faults can cause sudden, severe damage. Fires spread quickly, investigations are complex, and losses are often total. That combination makes insurers cautious.
They are less concerned with inconvenience and more with the likelihood of a claim that escalates fast.
Disclosure matters more than perfection
If outdated wiring is known, it should be disclosed. This often comes from a survey, a previous electrician’s report, or visible features like old fuse boxes.
Insurers are usually more flexible when issues are declared up front. Discovering them after a fire is a different conversation.
Inspections and reports insurers tend to ask for
Properties with older wiring often trigger requests for evidence.
- Electrical Installation Condition Reports
- Confirmation of when the system was last upgraded
- Details of consumer unit type and safety features
- Invoices for recent remedial work
Clear reports that rate the system’s safety carry weight.
How outdated wiring affects claims
If a fire occurs, insurers usually investigate whether faulty wiring contributed. Where damage arises from an insured event unrelated to electrics, claims are often more straightforward.
If the wiring itself caused or worsened the loss, insurers may limit payment or rely on exclusions linked to poor maintenance or known defects.
Excesses, exclusions, and temporary conditions
Some policies apply higher excesses for fire claims where electrics are outdated. Others include conditions requiring upgrades within a set timeframe.
These arrangements aren’t unusual. They reflect a desire to reduce ongoing risk rather than a refusal to insure.

Rewiring and how insurers view it
A full or partial rewire can change how a property is assessed, but insurers usually want confirmation once work is complete. That means certificates, reports, and dates.
Until that evidence is provided, terms often remain based on the previous risk profile.
Buying a house with old electrics
Surveys frequently flag outdated wiring as something to address. Insurers may ask whether work is planned and when.
Arranging insurance early can surface conditions while there’s time to factor upgrades into the purchase decision.
Why precision beats reassurance
Electrical systems are one of the areas where insurers prefer facts over optimism. Saying the wiring “seems fine” rarely helps.
Home insurance for houses with outdated wiring is usually available. The outcome depends on disclosure, evidence of condition, and whether the risk is understood rather than ignored.