The mandatory surveys before a sale: the list and the pitfalls

Before any sale of a home in France, the seller must have the mandatory technical surveys drawn up and hand the file to the buyer by the signing of the preliminary contract at the latest: energy performance, asbestos, lead, electricity, gas where applicable, termites depending on the zone, natural risks, drainage. Each survey has its own validity period, some very short, others very long, and an expired report counts as a missing one. The seller answers for any absence or inaccuracy. From abroad, everything is managed remotely: access to the property, a grouped appointment, digital reports. This file is a cornerstone of the journey to selling French property from abroad.

What does the file handed to the buyer contain?

The technical diagnostics file brings together the surveys that inform the buyer about the condition of the home and the risks being taken. It accompanies the preliminary contract, then the authentic deed received by the notary. Here is the list, with the stake each document represents for you, the seller:

Survey	When it applies	Stake for the seller
Energy performance (DPE)	For every enclosed and covered building, with exceptions	The rating weighs on buyer appeal, and a very energy-hungry home can face progressive bans on letting
Asbestos	For buildings whose planning permission predates a date set by the regulations	Degraded material triggers an obligation to carry out works before the sale, and the information must be exact
Lead	For buildings predating a date set by the regulations	A proven risk sets off information duties and, where there is degradation, works
Electricity	For interior electrical installations beyond a certain age	It informs the buyer about the safety of the installation, and protects you against a later defect claim
Gas	For gas installations beyond a certain age	Same logic: informing about the safety of the installation
Termites and other wood-eating insects	In zones delimited by prefectural order	A dated report locates any infestation in the timber of the building
Natural, mining and technological risks	For any property in a listed risk zone	Information about exposure to risk is mandatory so the buyer can insure with full knowledge
Drainage	For any property not connected to the public network	The individual system must be checked; non-compliance is often negotiated as a price adjustment or works

Two simple rules avoid most disappointments. First, a single survey does not make a file: it is the complete, up-to-date set that protects you. Second, the surveyor must be chosen with care: proper certification, professional insurance and a precise report, not a sloppy document that would expose you instead of covering you.

How long do the surveys remain valid?

This is where most of the pitfalls hide. Each survey follows its own validity logic: some expire quickly, others cover many years, and others still only run from the date the file is handed over. In other words, a report drawn up long ago may still be valid, or on the contrary void, depending on its nature. The only safe approach is to take stock a few weeks before going to market and to redo whatever needs redoing.

In practice, the timeline of a well-run sale looks like this:

• Valuation and choice of pricing strategy.
• Ordering the diagnostics file, grouped into a single appointment where possible.
• Handing the file to the buyer by the signing of the preliminary contract at the latest.
• Signing the preliminary contract, then the authentic deed before the notary, within a timeframe that is negotiated.

If time elapses between the preliminary contract and the deed, check that nothing has expired along the way: a file that was valid at the preliminary stage must still be on the day of the deed. Your dedicated contact can track that for you in the calendar.

What does the seller risk in case of absence or inaccuracy?

The protective logic is constant: the buyer must know what they are buying. If a survey is missing, expired or erroneous, you cannot invoke the as-is clause to exclude liability for hidden defects on the points that survey covers. A wronged buyer may seek a price reduction, damages, and in certain specific cases challenge the sale itself.

Liability can also attach to the surveyor, whose professional insurance can be called upon in case of error. But the first person exposed remains the seller: it is the seller who commissions, pays for and hands over the file. Hence three reflexes: keep the original reports, disclose in writing anything known that would complete the surveys, and never be tempted by a cut-price file, which protects nobody and always costs more later.

A word on the DPE, which has become central: its rating underpins thermal regulation, and a very energy-hungry home can face progressive bans on letting. Buyers factor it into their offer; better to know your rating before setting a price, a point our article on valuing a property for sale covers in detail.

How are the surveys organised from abroad?

Nothing requires the seller to be present. Remote organisation rests on three levers:

• Access to the property: a set of keys entrusted to a trusted person on site, or access coordinated with the tenant if the property is occupied, with the notice provided for in the lease.
• The grouped appointment: asking the surveyors to come together, or on the same day, reduces trips back and forth and the risk of omissions.
• Digital receipt of the reports: the surveys are delivered as files, which you forward to the notary and to the partner handling the sale.

Between the technicians’ visit and the handover of the file, an inspection visit with report, on a quoted basis, secures the chain: it checks that the surveyors reached every room, that nothing was left open after the visit, and it documents the condition of the property on that date. An occupied property calls for even more careful coordination: the subject is covered in detail in our article on selling a tenanted property.

Surveys and selling strategy: what is the link?

The file is not an end-of-process formality: it is a selling argument. A complete, recent and readable file reassures, speeds up negotiation and reduces the risk of a price renegotiation after the preliminary contract. Conversely, an average DPE assumed from the listing onwards, with a costed works estimate if needed, is better than a last-minute discovery. And if the property is occupied by a tenant, the survey calendar must fit the chosen strategy, selling occupied or selling vacant.

To follow every step of this journey, from price to deed, browse the Selling and transfer category of the Journal.

A diagnostics file is not improvised at a distance: it is prepared. The personal study offered by French Realty helps you plan these surveys for your property, with your dedicated contact, so the sale starts on a sound footing.