Electrics, heating and drainage: the specialist reports

There is a settled way of talking about services inspections. It is worth asking how much of it survives contact with the detail.

Observation is not testing

A surveyor notes visible age indicators — the type of consumer unit, the style of sockets, the presence of old cable insulation — and infers likely age. None of that establishes whether circuits are safe, correctly protected or adequately earthed. The recommendation to have an electrical inspection carried out by a qualified person is therefore a real next step rather than a disclaimer.

The same applies to gas appliances, heating systems and drainage.

Electrical inspection

A periodic inspection produces a report classifying observations by severity, from immediately dangerous to improvement recommended. Older installations are not automatically unsafe; they are assessed against current standards, and some deviations are recorded without being dangerous.

In practice, rewiring an entire house is expensive and disruptive, and partial upgrades are often sufficient depending on the findings. Regulations and certificate formats differ by country, so ask what the local standard document is called and what date it carries.

Gas and heating

A qualified engineer checks appliances for safe operation, combustion and ventilation, and issues a safety record where the jurisdiction requires one. Landlords in many countries have a statutory duty to obtain this annually; owner-occupiers usually do not, which is why records often stop at a sale. A boiler service history tells you about likely remaining life, which is a maintenance planning question rather than a safety one.

For most people, ask for the make, model and installation date, since parts availability for discontinued models affects future repair cost.

Drainage

A camera survey of the underground drainage identifies cracks, displaced joints, root ingress and misconnections. It is commonly recommended on older properties, on properties with mature trees, and wherever movement or damp has been noted. Defective drains cause subsidence by washing away supporting material and cause damp by discharging against walls, so the finding connects to two other risks.

Responsibility for shared and lateral drains varies by jurisdiction, and your conveyancer establishes who maintains what.

Reading a certificate properly

Every certificate has a date, a scope and a set of limitations, and none of them warrants the installation indefinitely. A certificate produced when work was done says the work complied then; it says nothing about the rest of the installation. Where a certificate is missing for past work, a conveyancer will raise it as an enquiry, which is a legal issue as well as a safety one.

Collect the certificates during the transaction, since reassembling them after completion is much harder.

None of this is a substitute for talking to a clinician if something feels wrong.

Deciding what to commission

On a modern, recently serviced property with documentation, additional specialist reports may add little. On an older property, one that has been empty, or one with visible signs of age in the services, they are usually the best value spend after the survey itself.

Commission them before exchange, because after that they inform your budget rather than your decision. This is general information; qualified electricians, gas engineers and drainage specialists should assess any specific installation.

The takeaway

Treat every recommendation to test as an instruction to commission, not as a caveat to skim.

Small and repeatable beats ambitious and abandoned, almost every time.