House Rewire Certificates: EIC & Part P Explained

After a full house rewire, you should receive an Electrical Installation Certificate (EIC), including its inspection and test schedules, plus the appropriate Building Regulations completion paperwork. These documents do different jobs. A receipt, a consumer-unit label or a verbal assurance that everything has been tested is not the same as the complete handover pack.

This guide explains what to expect for a home in Cardiff or elsewhere in Wales, what the technical pages mean and what to do if something is missing. If you are still planning the work, explore our house rewiring services in Cardiff and agree the certification arrangements before accepting a quotation.

The main documents at a glance

Electrical Installation Certificate: records responsibility for the electrical work described, together with the installation details and declarations.
Inspection and test schedules: accompany the EIC and record the relevant checks, circuit information and measured results.
Building Regulations paperwork: records completion through the applicable notification or building-control route; with a competent person scheme this is normally a Building Regulations compliance certificate.
Handover information: circuit identification, operating instructions and any applicable equipment or alarm documents.
Warranty information: explains any agreed workmanship cover or manufacturer guarantees; it is separate from electrical certification.

What is an Electrical Installation Certificate?

An EIC is the installation certificate for the work being certified. It identifies the property and the extent of the installation, records relevant supply and protective arrangements, and includes declarations for design, construction, inspection and testing. A complete rewire should be described accurately; the wording should not leave you guessing which circuits or areas were included.

The certificate is not just a statement that the sockets work. An installation can appear to operate normally while having faults that require proper inspection or testing to detect. The EIC and its accompanying schedules provide the technical record of the completed work.

Check the scope particularly carefully after a partial rather than a full rewire. Certification of new work does not automatically declare that every untouched part of an older installation has been renewed. Ask the contractor to explain any retained circuits and how they have been assessed for the proposed work.

Why do the inspection and test schedules matter?

The schedules are part of the certificate package, not optional background reading. They connect the declarations to information about the actual circuits and the checks carried out. Receiving only the front page can leave important information missing.

You do not need to interpret every abbreviation yourself. In broad terms, the paperwork covers the installation’s inspected features, circuit details, protective devices and the relevant electrical test results. Depending on the circuit and equipment, these include checks of protective-conductor continuity, insulation, polarity, fault protection and RCD operation.

Some tests establish that protective connections are continuous; others assess insulation or whether protective arrangements can operate as intended. The electrician must interpret results together with the circuit design and installation conditions. There is no useful single “pass number” a homeowner can apply to every row.

Ask for the complete, legible document with all referenced schedules and continuation pages. If entries are blank, marked not applicable or difficult to understand, ask the contractor to explain them rather than attempting your own electrical investigation.

Is the EIC the same as an EICR?

No. An Electrical Installation Condition Report (EICR) assesses the condition of an existing installation at the time of inspection, within its stated extent and limitations. An EIC certifies the installation work described in it. The similar names are a common source of confusion.

An EICR obtained later may help establish the current condition of a house, but it does not recreate the original design and construction declarations or automatically resolve missing Building Regulations notification. If a rewire has just been completed, ask for the installation certificate rather than treating a condition report as an interchangeable substitute.

Where the condition of existing wiring is uncertain, our electrical inspection and testing service can help you understand what assessment is appropriate. That is a separate question from obtaining the paperwork for newly completed work.

What is the “Part P certificate” in Wales?

“Part P certificate” is the everyday name often used for a Building Regulations compliance certificate. It is separate from the EIC: one records electrical installation certification, while the other relates to the Building Regulations notification process.

For a full rewire in Wales, agree the compliance route before work starts. A contractor registered for the relevant work under a competent person scheme can arrange notification through that route. Otherwise, contact Building Control in advance to agree the application and inspection arrangements. The completion document depends on the route used.

The Welsh Government’s electrical-work guidance says that, under the competent person scheme route, the electrician should arrange a compliance certificate within 30 days of completion and notification of the local authority. Check the contractor’s relevant registration, rather than relying only on a logo.

Wales and England do not have identical notification rules for all smaller electrical alterations. This article concerns the handover after a rewire; for other work, check the Welsh requirements for the actual job rather than applying an England-only checklist.

When should the documents arrive?

Agree delivery and the correct email or postal address before completion. The EIC should follow promptly once the work and certification process are complete; the scheme-generated Building Regulations certificate may arrive separately. NICEIC’s householder guidance says it generally expects a completed EIC shortly after the job finishes and advises following up if certification has not arrived within a month.

Ask at handover which documents are being supplied immediately, which will follow and whom to contact. Check email attachments and spam folders, but do not let “the office will send it” remain an open-ended answer. Save the correspondence alongside the quotation and invoice.

What else belongs in the handover?

A useful handover also makes the installation understandable in day-to-day use. The consumer unit should have clear circuit identification, and the descriptions should be consistent with the circuit information in the paperwork. Ask the electrician to explain the main switch, protective devices and any user checks specified by the equipment manufacturer.

Keep instructions for new equipment, details of any smoke or heat alarms installed and any relevant installation or commissioning documents for those systems. An electrical certificate is not a substitute for every product’s instructions or every separate system’s documentation. Do not remove the consumer-unit cover to compare labels with the wiring.

If workmanship cover or an equipment warranty was included, obtain its terms in writing. Check the provider, duration, exclusions and claim procedure. Electrical certification records the work; it is not an unlimited promise that components cannot fail or that the installation will never need attention.

A homeowner’s handover checklist

Is the property address correct on each document?
Does the description match the rewire actually agreed and completed?
Are the relevant declarations completed and dated?
Have all inspection schedules, circuit schedules and test-result pages been supplied?
Are any retained circuits or exclusions clearly explained?
Have you received the Building Regulations document, or a clear delivery timescale and contact?
Do the consumer-unit circuit descriptions make sense?
Have you received equipment instructions and any agreed warranty information?
Have you saved a backup copy somewhere you can find when moving home?

Make certification part of the agreed scope from the outset. Our guide to what a full house rewire quotation should include covers this alongside installation details, exclusions and making good.

What if the rewire certificate is missing?

Start by establishing which document is missing. An EIC and a Building Regulations compliance certificate are different records, so they may need different recovery routes.

Missing EIC or test pages: contact the contractor who carried out the work and request the complete certificate, quoting the address, approximate completion date and invoice reference.
Missing scheme compliance certificate: contact the contractor or scheme operator. NICEIC directs customers to its notification-check service for replacement Building Regulations certificates; this does not supply the original EIC.
Work completed through Building Control: contact the relevant building-control body about its records and completion documentation.
No record or unresolved concerns: obtain advice from the relevant scheme or Building Control about the appropriate next steps. A condition assessment may also be needed, but should not be described as recreating the original paperwork.

Keep requests in writing. If the contractor has stopped trading or cannot provide the documents, explain that when seeking advice. Do not buy a generic certificate or ask someone to sign declarations for work they cannot properly take responsibility for. Paperwork recovery and checking present-day safety are related but separate tasks.

Why keep the certificates after moving in?

They help future electricians understand the installation and provide a record of the work when the property changes hands. A buyer, conveyancer or insurer may ask for them. Keep the complete files with the property records and seek advice about any missing documents early, rather than discovering the gap during a sale.

An old certificate is a record of work at a particular time, not proof of the installation’s condition forever. Follow the recommended inspection arrangements, and seek advice sooner if there is damage, a fault or a significant change in use. Rented homes also have separate obligations; this rewire handover guide is not a substitute for landlord-specific advice.

Planning a properly documented rewire in Cardiff?

Ask about the handover as well as the new sockets, lighting and consumer unit. A clear quotation and a complete set of records make it easier to understand what has been installed and maintain it afterwards.

Gabe Electrical can discuss the scope, testing and certification for your project. Explore our full and partial house rewiring service or call 07894 349680.