Bringing an old flat's electrics up to standard: where to start

Bringing an old flat’s electrics up to standard starts with a survey of the installation, carried out by a professional electrician. Electrics are the first safety item in an old home: they come before the finishes, not after. The typical sequence of works chains the replacement of the consumer unit, the overhaul of the circuits, the checking of the earthing and the protection of rooms with water. Depending on the scale of the works, a certificate of conformity closes the site.

How do you recognise a tired electrical installation?

An ageing installation sends signals long before the breakdown. Learn to read them:

• a hotchpotch of fuses, replaced over the decades with mismatched models;
• ungrounded sockets that take no earth pin, or chains of extension leads hidden behind furniture;
• a consumer unit from another era, with no differentiated protections and no identifiable residual current device;
• repeated tripping as soon as two appliances heat together;
• scorch marks, odd smells, bare cables under broken trunking.

A single one of these signs justifies an inspection. Several together call for swift action: switch off the circuit concerned, unplug the suspect appliance and bring in a professional. From abroad, these signals show up during an inspection visit, provided someone looks for them and photographs them for you.

To these signs add the history of the property itself. The older the flat, the higher the odds of an installation altered over the years with no overall plan: every decade added its circuit, its extension lead, its make-do fix. So the real question is not whether the installation is old, it almost always is, but whether it has ever been overhauled in depth, by whom, and over what scope. That is precisely what the survey establishes.

Why do electrics come before the finishes?

Two reasons impose this order, and neither tolerates exceptions.

Safety, first. A worn-out installation means a risk of electric shock and a risk of fire starting, two dangers that do not wait. The French electrical standard sets out the requirements an installation must meet, from the consumer unit to the bathrooms: bringing it up to standard exists first to protect people.

The logic of the works, next. Circuits hide inside walls and floors: installing them means chasing channels, cutting and filling. It is light structural work, incompatible with brand-new finishes. Repainting before the electrics amounts to dressing a wall that is destined for a trench. In an old flat, electrics are redone first and decoration last: it is the order followed by all our guides in the Travaux & rénovation category.

One further reason, specific to absent owners: an installation brought back to order simplifies everything that follows. Home insurance is taken out more calmly, a tenant moves into a home with verified protections, a prospective buyer asks fewer questions. Electrics are one of those projects that are invisible once finished: nobody notices them, except precisely the people who know they have been done.

The electrical survey, the true starting point

A survey by a professional electrician maps the real installation, not the one you imagine: consumer unit, number and condition of circuits, presence and continuity of the earth, protections in place, compliance of rooms with water. It ends with a written report, ordered by priority, distinguishing what threatens people from what is merely a matter of comfort.

This report plays three roles. It secures: immediate dangers are identified and neutralised first. It frames: the quotes from the electricians approached rest on the same described condition, and are therefore comparable. It documents: from abroad, this written and photographed report is your eyes on an installation you cannot see. Ask for it before any commitment, and keep it in the property file.

A serious survey contains, at minimum:

• the record of the existing consumer unit and its protections;
• the mapping of known circuits, room by room;
• the presence, absence or doubt over the earthing;
• the condition of rooms with water against the safety requirements;
• a list of recommendations in order of priority, from urgent to comfortable.

How does the typical works sequence unfold, step by step?

Once the survey is done, the works follow a proven sequence. Here it is, with the aim of each step and who carries it out.

Step	Aim	Who
Full diagnosis	map the installation, spot the dangers, prioritise	a professional electrician
Replacing the consumer unit	protections matched to each circuit, accessible main switch	a professional electrician
Overhauling the circuits	remove hazardous spurs, spread usage room by room	a professional electrician
Earthing	drain leakage currents, protect people	an electrician, sometimes with the managing agent
Rooms with water	equipotential bonding and protection volumes around water points	a professional electrician
Final check and certificate	verify the whole and, where applicable, certify conformity	the authorised body or the electrician, depending on the case
Opening and monitoring the site	let the tradesmen in, track progress, document	you, or a representative on site

The first two lines are not up for debate: they carry the core of the safety. The rest adjusts to the survey. This site is run like any other: our guide to running building works from abroad covers the organisation, the selection of tradesmen and the follow-up. When it comes to tracking progress, the article on following a building site remotely details the routine of photos and reports.

When does the certificate of conformity apply?

When the installation is deeply modified, a new consumer unit or new circuits, a certificate of conformity may be required, notably by your insurer or for certain official procedures. It is issued under the conditions laid down by the regulations, by the authorised body or professional depending on the case. Ask the electrician, before the works begin, whether your situation calls for one: the answer shapes the end of the site.

Keep this certificate with the property file. On the day of a sale or a change of insurer, it proves the installation was redone to the rules and makes the formalities easier. Without it, the electrical survey required on a sale under the regulations remains the reference document, with the reservations it contains.

A precision for let properties: the regulations require the landlord to deliver decent housing, notably in terms of safety, and the state of the electrical installation feeds into that assessment. Bringing the electrics up to standard is therefore not only a matter of comfort or resale: it is an obligation of prudence that applies throughout your ownership, not only on the day of the transaction.

While waiting for the works, day-to-day safety

A full electrical project is not decided over a weekend, least of all from abroad. In the meantime, a few small repairs reduce the everyday risk: replacing a cracked socket, permanently unplugging a suspect appliance, relieving an overloaded extension lead. A small repairs and call-out service, on quotation, can carry out these gestures and send you photos before and after.

One organising tip, finally: group these small repairs with the visits already planned, rather than triggering a trip for the sake of one socket. Every visit to the property is a chance to check, photograph and note; wasting it would be a pity. The list of signals spotted at the last visit thus becomes the works list of the next one, and the electrical file builds itself, visit after visit.

The electrics of an old flat cannot be improvised, but they can be prepared calmly: a professional survey, an orderly project, a certificate at the end. To organise this upgrade around your property and your calendar, the personal study offered by French Realty lays the foundations with you, before the first quote.