Electrical Installation Condition Report: Cost, Process and 5 Mandatory Tests

Key facts about the inspection report

An electrical installation condition report is the document that shows the wiring in a flat or house is safe to use. It is needed when a new installation is connected, after rewiring, and as evidence for insurers, and in many countries banks, valuers, buyers or tenants ask for it as well. It must be issued by a qualified electrician or an authorised inspection body, depending on national rules, not by just anyone holding a screwdriver. Inspecting a flat usually takes 2 to 4 hours and costs roughly €205.90 to €308.90, current prices are on the Electrical installation work page.

A proper inspection is more than a glance at the consumer unit. It consists of visual inspection, functional testing and measurements on every circuit, recorded so that it is clear which circuit and which breaker was tested and with what result.

What is an inspection report and who may issue it?

The report is a written record confirming that the installation meets the technical standards in force and can be operated safely. Across Europe the testing methods are largely harmonised, but the rules on who may sign the report differ. In some countries only a licensed inspection technician may issue it, in others any registered electrical contractor, and some require periodic checks by an independent inspection body that had no part in the installation.

One distinction matters everywhere: the electrician installs, the inspector verifies. On a renovation it is an advantage if the inspection is carried out by someone outside the installation team, as the check is then more independent. To see how the inspection fits into the overall budget, read the article on the cost of rewiring by flat size.

When is an inspection report required or useful?

For a new build: across Europe, the network operator generally only connects a new installation once it has been tested and documented. For new buildings the inspection covers the internal wiring and also the external low-voltage connection to the meter. Check with your local authority and network operator which documents they require.

After rewiring: any major change (new consumer unit, extra circuits, replacing old aluminium or unearthed wiring) requires a new initial inspection of the altered part. During a bathroom and toilet renovation, testing the electrics is a standard part of handover. Everything a new installation involves and what it costs is in the electrical installation work category.

On sale or rental the rules vary most. Some countries make an electrical report part of the documents a seller or landlord must provide for older installations, others require periodic checks of rented homes, and many leave it to the buyer, the bank or the insurer to ask. After an insurance claim, such as an electrical fire, a recent report is important evidence of the installation's condition. Businesses and public buildings are usually subject to periodic inspections, with intervals of one to five years depending on the type of premises. For a private home, an inspection roughly every 5 to 10 years is widely recommended as sensible practice.

Which 5 tests and measurements does the inspection include?

A professional inspection is not just a visual check. The inspector uses a calibrated multifunction tester and compares the results with the limit values set by the standards for each type of circuit and protective device. In a home, five areas matter most.

1. Insulation resistance

This shows whether the insulation of the conductors is damaged or has aged. Low insulation resistance means a risk of leakage currents, short circuits and fire. It is a typical problem in old aluminium or rubber-insulated wiring and in cables damaged when chasing walls or drilling.

2. Continuity of the protective conductor

The inspector checks that the green-and-yellow earth conductor is unbroken from the consumer unit to every socket and appliance. A broken protective conductor is a very dangerous fault: if an appliance fails, its metal casing can remain live.

3. RCD test

The inspector verifies that the residual current device trips at the specified residual current and within the specified time. Pressing the test button only checks the mechanism, not the actual tripping values. An RCD that does not trip is a serious defect that must be fixed before the installation is put into service.

4. Earth fault loop impedance

This shows whether the circuit breaker will disconnect fast enough in the event of a fault. The tester calculates the loop impedance from the voltage difference before and during a test current. A high value often reveals a loose connection in a terminal, breaker or socket, which can overheat.

5. Inspection and testing of the consumer unit

Tightness of terminals, labelling of circuits and breakers, operation of the main switch and of surge protection where fitted. The inspector also looks for signs of overheating on the conductors.

What the report should contain

A useful report states the extent of the installation inspected, the results of the visual inspection and the tests, for each circuit its reference, protective device and measured values, the defects found and how serious they are, and the recommended date of the next inspection. It also lists the test instrument used, the date, the inspector's name, signature and licence or registration number.

If you receive a report containing only general statements such as "the installation is safe to use" without measured values for individual circuits, ask questions. A report like that is hard to defend in a dispute or an insurance claim.

How much does an inspection report cost?

The price of an electrical installation condition report for a flat ranges from €205.90 to €308.90, depending on the size of the flat and the number of circuits. A separate inspection of the external low-voltage connection costs €186 to €279. On new builds both inspections are done on the same visit, which saves a call-out.

The price depends on the number of circuits tested, whether drawings are available (without them the inspector needs more time) and the region, with prices usually higher in capital cities and large urban areas. Current prices for the inspection and related work are on the Electrical installation work page. In a renovation budget it is a small item, yet it protects your biggest investment, your home.

How does the inspection work, step by step?

1. Preparation. The electrician should have the installation ready: all sockets and switches fitted and covered, no loose conductor ends, a consumer unit with numbered and labelled breakers and RCDs, and at least a simple drawing of where the cables run. An installation that has not been prepared is the most common reason an inspection fails.

2. Visual inspection and documents. The inspector asks for drawings and the previous report, if there is one, and checks the consumer unit, sockets, switches and visible wiring.

3. Testing. Circuit by circuit, with a calibrated instrument. In a typical flat this takes a few hours, in larger houses with many circuits up to half a day.

4. Writing the report. It contains the measured values, the defects classified by severity and a conclusion on whether the installation is safe to operate. After a new installation, defects should be put right before the report is issued.

What goes wrong in practice

An inspection by someone without the right qualification. Such a report will not be accepted by the authority, the network operator or the insurer, and you end up paying twice. Always check the inspector's licence or registration and the number stated in the report.

No documentation. Without drawings (typical in older flats), the inspector has to trace circuits by hand, which takes longer and costs more. On any renovation, always ask the electrician for as-built documentation: a simple drawing showing where the cables run and which breaker protects which circuit.

A report without measurements. A "desk" report issued without a visit or without measured values is worthless. On handover, check that it contains a table of circuits with values.

A missed re-inspection. Few people remember the recommended interval. Set a reminder based on the date in the report.

Terminals not re-tightened. Many electricians recommend checking and re-tightening the connections in the consumer unit within six months of installation. It is a small step that prevents connections from heating up.

How to choose an inspector

Check that the inspector holds a valid licence or registration under the rules of your country, ask for a firm delivery date for the report and compare 2 to 3 quotes. An inspector who has worked in your area for years is an advantage: they know the local network operator's requirements and can help with the paperwork for connection or handover.

Checklist when you receive the report

• Does the report state the inspector's name, signature and licence or registration number, and the test instrument used?
• Is the scope described (whole flat, bathroom only, supply connection)?
• Are measured values and the protective device listed for every circuit?
• Are defects classified by severity, and is it clear who will fix them and by when?
• Is there a conclusion on safety and a recommended date for the next inspection?
• Does the labelling in the consumer unit match the drawing and the report?

FAQ - Common questions about electrical inspection reports

How much does an electrical installation condition report cost?

A report for a flat costs €205.90 to €308.90, and an inspection of the external low-voltage connection €186 to €279. The price depends on the number of circuits and the region. Current prices are on the Electrical installation work page.

How long is an inspection report valid?

For private homes, an inspection roughly every 5 to 10 years is widely recommended, and some countries set fixed intervals for rented homes or require a recent report on sale. Businesses are inspected more often. A new inspection is needed after any major change to the installation.

Who can issue an inspection report?

Only a qualified, licensed or registered professional as defined by national rules, or an authorised inspection body where independent checks are required. An unqualified person cannot issue a valid report.

What happens if the inspection finds defects?

The inspector classifies them by severity. Dangerous defects (an RCD that does not trip, a broken protective conductor) must be put right immediately and retested. Less serious ones can be fixed within the deadline the inspector sets.

Do I need an inspection report to sell a flat?

That depends on the country. In some it is a required document for older installations, in others it is not required by law, but buyers, banks and valuers often ask for it. A valid report also makes the listing more credible.

Calculate the cost of an inspection for your home

This guide gives you an indicative price range, current prices are on the Electrical installation work page. The exact price depends on the size of the home, the number of circuits and the region. Before you contact an inspector, work out an indicative price in the Numiq online calculator. You will get a realistic view of market prices, a stronger position when negotiating and, once signed in, you can return to your calculations at any time.

Open the Numiq calculator