EICR Explained: What an Electrical Report Means for Your Purchase
An Electrical Installation Condition Report (EICR) is the standard way to formally assess a property's electrical safety, and while a RICS survey will comment generally on visible electrics, it explicitly won't test the electrical installation itself — that's what an EICR is for. If you've been handed one, or your survey recommends getting one, here's how to actually read it.
What an EICR Actually Tests
A qualified electrician inspects and tests the fixed electrical installation — the consumer unit (fuse box), wiring, sockets, switches and earthing/bonding — against current safety standards, and produces a report classifying any issues found by severity using a standard coding system.
The Coding System Explained
C1 — Danger present, risk of injury, immediate action required The most urgent classification. Something poses an immediate safety risk and should be addressed before the installation is used further, sometimes even before you'd be comfortable living in the property.
C2 — Potentially dangerous, urgent remedial action required Not an immediate danger but a genuine risk that needs fixing promptly — this is the most common serious finding on older or unmaintained installations.
C3 — Improvement recommended Not dangerous, but doesn't meet current best-practice standards. Common in older properties with wiring that was compliant when installed but hasn't kept pace with updated regulations. Not something you need to act on immediately.
FI — Further investigation required The electrician found something they couldn't fully assess without more invasive investigation (e.g. lifting floorboards, accessing behind fixed panels) and wants that done before giving a final verdict on that specific item.
"Satisfactory" vs "Unsatisfactory" overall result — an EICR gives an overall pass/fail. Any C1 or C2 finding results in an "Unsatisfactory" overall report, even if everything else is fine.
Does "Unsatisfactory" Mean the House Needs Rewiring?
Not necessarily — this is the most common misconception. A single C2 finding (say, a specific missing earth bond, or an inadequate consumer unit) makes the whole report "Unsatisfactory," but that might be a modest, targeted fix, not a full rewire. Ask specifically what generated each coded item, not just the headline result.
Signs an Old Installation May Genuinely Need a Full Rewire
- Old fuse-wire fusebox rather than a modern consumer unit with RCD protection
- Round-pin sockets or very few sockets per room, suggesting the wiring predates modern usage patterns
- Fabric-insulated or rubber-insulated cabling visible anywhere accessible (an age indicator — this insulation degrades and cracks over decades)
- No visible earth bonding to metal pipework
- An EICR with multiple C1/C2 findings across different circuits, rather than one isolated issue
Realistic Costs
| Job | Typical cost | Notes |
|---|---|---|
| EICR inspection and report | £150 – £300 | Worth commissioning independently if the seller's is old or missing |
| Single C2 remedial item (e.g. earth bonding) | £80 – £300 | Common, quick fix |
| Consumer unit replacement (modern RCD unit) | £350 – £700 | Frequently the single item that resolves several coded findings at once |
| Partial rewire (specific circuits/rooms) | £1,500 – £4,000 | Where issues are concentrated rather than property-wide |
| Full rewire, 3-bed house | £4,500 – £7,500 | Where the installation is genuinely at end of life |
What to Do Before You Offer
Ask for the property's current EICR — if there isn't one, or it's more than a few years old, factor in the cost of commissioning one, and don't assume "the electrics look fine" from a viewing tells you anything meaningful about the fixed installation's actual condition. If you do have an EICR showing C1/C2 findings, ask specifically what generated them before assuming a full rewire is needed — it might be a much smaller job.
How Chat to Your Builder Helps
For £59, we'll help you read through an EICR or survey electrical findings, tell you whether you're likely looking at a targeted fix or a full rewire, and give you realistic costs either way.
We've helped buyers interpret electrical findings on properties across Manchester, Liverpool, Sheffield, Nottingham and Bradford. See our related guides on old wiring types and boiler and gas safety findings.
Book your consultation today and get a clear read on what an EICR result actually means for your purchase.
Frequently asked questions
Does an 'Unsatisfactory' EICR always mean a full rewire is needed?
No. A single C2 finding is enough to make the overall report 'Unsatisfactory,' but that might be a small, targeted fix rather than a full rewire. Always ask what specifically generated each coded item before assuming the worst.
How long does an EICR remain valid?
There's no single legal expiry for owner-occupied homes, but the report itself will recommend a re-inspection interval, commonly 10 years for a private residence (shorter for rented properties). An EICR older than that interval is worth treating as out of date.
Is a RICS survey the same as an EICR?
No. A RICS survey only comments visually on electrics and explicitly doesn't test the installation. An EICR is a dedicated, hands-on electrical test carried out by a qualified electrician and is the only way to get a genuine safety assessment of the wiring itself.
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