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Pre-Purchase Electrical Survey

Electrical survey before buying a property. Full inspection of wiring, consumer unit, and safety systems. Qualified and insured.

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Pre-Purchase Electrical Survey

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NICEIC & NAPIT registered.

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Funds held until you're happy.

How it works

1

Arranging access

You or your solicitor arrange access with the vendor or estate agent. The electrician needs access to the consumer unit (often in a cupboard under the stairs), loft space, all rooms, and any outbuildings or garages with electrical supplies. Ideally, the property should be empty or have minimal furniture for a thorough inspection.

2

Visual inspection of the installation

The electrician visually inspects the consumer unit, meter arrangement, wiring at all accessible points, sockets, switches, light fittings, and any visible cable runs. They are looking for the age and type of wiring, signs of amateur work, overloaded circuits, and compliance with the regulations in force when the installation was originally done.

3

Electrical testing

The same testing regime as a full EICR is carried out: insulation resistance, earth continuity, earth fault loop impedance, RCD trip times, and prospective fault current. This reveals hidden problems such as deteriorated cable insulation, broken earth conductors, or circuits that would not disconnect safely in a fault.

4

Assessment and costing

The electrician reviews the findings and provides an overall assessment of the installation's condition. Unlike a standard EICR, a pre-purchase survey typically includes estimated costs for any remedial work or upgrades identified — giving you figures you can use in purchase negotiations.

5

Report and advice

You receive a full EICR-format report with classification codes, plus a written summary in plain language covering what is safe, what needs attention now, what will need attention in the coming years, and the estimated costs. The electrician discusses the findings with you and answers questions about the implications for your purchase decision.

What's included

Full visual inspection of the fixed electrical installation
Age assessment of wiring, consumer unit, and key components
Dead testing — insulation resistance, continuity, and polarity
Live testing — earth fault loop impedance, RCD trip times, prospective fault current
Inspection of earthing arrangement and main bonding
Assessment of consumer unit type, condition, and adequacy
EICR-format report with C1/C2/C3/FI classification codes
Plain-language summary of findings and condition
Estimated costs for remedial work and recommended upgrades
Advice on urgency and prioritisation of any work needed

What's involved

A pre-purchase electrical survey is a thorough inspection of a property's electrical installation carried out before you complete a purchase. It goes beyond a standard homebuyer's survey (which only notes visible electrical defects) to test the actual condition of the wiring, consumer unit, earthing, and protective devices. The electrician will tell you what state the electrics are in, what needs immediate attention, what will need upgrading in the near future, and an approximate cost to bring everything up to standard. This information gives you negotiating power on the purchase price and prevents costly surprises after you move in.

A standard homebuyer's survey does not include electrical testing — surveyors note visible issues but cannot open consumer units or test circuits. Rewiring a house costs £3,000-8,000 or more. A consumer unit replacement costs £350-800. If the property has old wiring (rubber or cloth insulation, a rewirable fuse box, or no RCD protection), you could be facing thousands of pounds of essential work that was not flagged by the general surveyor. A pre-purchase electrical survey costs £200-400 and can save you from buying a problem — or give you hard evidence to negotiate the price down.

Get a personalised quote

Typical cost: £200–£400per survey

Every job is different — pricing depends on your property, location, and specific requirements. Describe what you need and a qualified electrician will quote you directly.

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How long does it take?

3-5 hours for a standard 3-bedroom house. 2-3 hours for a flat. Larger or older properties may take a full day, especially if there are outbuildings, garages with separate supplies, or extensive loft wiring to inspect.

Regulations & safety

Safety notice

A pre-purchase electrical survey involves testing live circuits and removing consumer unit covers. Only a qualified electrician with inspection and testing qualifications (City & Guilds 2391 or equivalent) should carry out this work.

If the electrician finds a C1 code (danger present), they will advise the vendor and inform you immediately. In rare cases, they may need to isolate a circuit for safety. This is important information for your purchase decision.

Do not rely on a standard homebuyer's survey for electrical safety. Surveyors are not qualified to open consumer units, test circuits, or assess wiring condition. They can only report on what is visible.

BS 7671:2018+A2:2022 (IET Wiring Regulations, 18th Edition)

The inspection and testing is carried out in accordance with BS 7671. The installation is assessed against the standard applicable when it was originally installed, but the report notes where it falls short of current 18th Edition requirements.

Part P of the Building Regulations (Approved Document P)

Any remedial or upgrade work identified by the survey that constitutes notifiable work (consumer unit replacement, new circuits, work in bathrooms or kitchens) must be carried out by a Part P registered electrician or notified to Building Control.

NICEIC and NAPIT Guidance on Pre-Purchase Inspections

Industry bodies recommend a full EICR-standard inspection before purchasing a property, particularly for properties over 25 years old or where there is no record of previous electrical inspections.

What to expect

Properties built before 1970 are the highest priority for a pre-purchase electrical survey. They may have original rubber or lead-sheathed wiring, rewirable fuse boxes, and no RCD protection. A full rewire can cost £4,000-8,000 depending on property size — this is critical information before you commit to a purchase.
Even newer properties (1990s-2000s) can have issues. DIY extensions, loft conversions without proper electrical certification, and cheap consumer units that have been recalled are all common findings. A certificate from the original build does not guarantee the current state of the installation.
Estate agents and vendors sometimes resist electrical surveys as they can uncover issues that affect the sale price. You are entitled to arrange any survey you wish as part of your due diligence. If access is refused, consider what might be being hidden.
Use the survey findings to negotiate. A C2 code requiring a consumer unit upgrade (£400-800) or evidence of deteriorated wiring that will need replacement within 5 years gives you concrete figures to present to the vendor. Many buyers successfully negotiate thousands off the asking price using pre-purchase electrical survey findings.
If you are buying a property that is already tenanted (buy-to-let), the vendor should have a current EICR. Ask for it. If they do not have one, or it is unsatisfactory, factor the cost of remedial work into your offer. You will need a valid EICR before you can legally let the property.

Frequently asked questions

Is a pre-purchase electrical survey the same as an EICR?
The testing is the same — a full EICR-standard inspection. The difference is the context and reporting. A pre-purchase survey typically includes an additional plain-language summary aimed at the buyer, estimated costs for remedial work, and advice on how the findings affect the purchase. You receive the formal EICR document as well.
Should I get an electrical survey even if the property has a valid EICR?
If the existing EICR is recent (within the last 1-2 years) and was carried out by a reputable firm, you may be able to rely on it. However, if it is approaching expiry, was done by an unknown electrician, or if you have any concerns about the property's electrical condition, commissioning your own independent survey is worthwhile.
Can I use the findings to negotiate the price?
Absolutely — this is one of the main reasons buyers commission a pre-purchase electrical survey. If the report identifies a consumer unit upgrade, partial rewire, or other remedial work, you have concrete evidence and estimated costs to present to the vendor. Many buyers negotiate reductions of £2,000-10,000 based on electrical survey findings.
When should I book the electrical survey?
After your offer has been accepted but before exchange of contracts. Book it alongside your homebuyer's survey and any other specialist surveys (damp, structural, roofing). The results need to be available before you are contractually committed to the purchase.
What are the most common problems found in pre-purchase surveys?
The most common findings are: lack of RCD protection, outdated consumer units (especially rewirable fuse boxes), deteriorated wiring insulation in pre-1970s properties, inadequate earthing and bonding, DIY work that does not comply with regulations, and overloaded circuits from extensions or conversions. Many of these are C2 codes requiring urgent remedial action.

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