What is NF C 15-100 and why does it matter?
NF C 15-100 is France's national standard governing the design and installation of electrical systems in residential buildings. It covers everything from cable cross-sections and socket placement to residual current devices (RCDs) and earthing requirements. If your home doesn't comply, your insurer can legally refuse to pay out after an electrical fire or accident.
In Nice, as across France, compliance is mandatory for any major renovation and for the sale of a property. A statutory electrical inspection report is required for homes over 15 years old. Identified defects can reduce the sale price or derail a transaction entirely.
Key requirements: sockets, lighting and the consumer unit
The standard sets minimum socket counts for each room: at least 6 in the kitchen, 5 in the living room and 3 in each bedroom. All sockets in wet areas must be protected by a 30 mA RCD. These rules exist to prevent electrocution and reduce the risk of electrical fires.
The consumer unit must include a main circuit breaker, individual breakers for each circuit and RCDs covering groups of circuits. High-power appliances — ovens, dishwashers and washing machines — each require a dedicated circuit. These are among the most common non-conformities found in older Nice apartments on the secondary market.
Wet zones: special rules for bathrooms and kitchens
NF C 15-100 divides the bathroom into three protection zones with different IP requirements. Zone 0 is inside the bath or shower itself, where only 12 V equipment is permitted. Zone 1 extends above the bath to a height of 2.25 m and requires a minimum IP44 rating. Zone 2 covers the 60 cm surrounding the bath, where switched sockets with adequate protection are allowed.
Bathroom non-conformities are among the most frequently flagged issues during inspections on the French Riviera. When you book an electrician in Nice through Build, you get a professional who understands local challenges: the city's older housing stock often features mixed wiring systems, missing earth conductors and outdated consumer units that require specialist handling.
How much does electrical compliance work cost in Nice?
Partial compliance work — replacing the consumer unit, fitting RCDs and adding sockets — in a 50–70 m² flat typically costs between €1,500 and €3,500. A full rewire of a similar property ranges from €4,000 to €8,000, depending on the complexity of the job and the condition of the existing installation.
Through Build, you can quickly find a qualified electrician in Nice, compare multiple quotes and choose the best offer for your budget and timeline. Every professional on our platform holds Qualifelec certification or equivalent, so you can be confident the work will meet NF C 15-100 requirements.
How to tell if your installation is up to standard
Warning signs of an ageing or non-compliant installation include two-pin sockets without an earth, cartridge fuse boxes, aluminium wiring or a consumer unit without RCD protection. Frequently tripping breakers are a reliable indicator that the system is overloaded or incorrectly wired.
Book an electrical inspection with a certified professional through Build: the electrician visits at a time that suits you, documents every non-conformity and draws up a prioritised action plan. This is an essential step before purchasing or renting out a property anywhere on the Riviera.
Frequently asked questions
For purely cosmetic work such as painting or wallpapering, compliance is not required. However, as soon as you replace a socket, a switch or add any new wiring, the work must conform to NF C 15-100. Non-compliance can become a liability when selling your property or making an insurance claim.
An electrical diagnostic inspection in Nice generally costs between €100 and €250, depending on the size of the property and the provider. On Build, you can request several quotes and compare them to find the right professional at the right price and with the availability you need.
While it is technically possible, it is strongly discouraged for safety and legal reasons. Only a qualified electrician can issue an attestation de conformité — the compliance certificate required by insurers and needed for property transactions. Attempting the work yourself could invalidate your home insurance.