Asbestos survey before works: the project owner's obligation that can halt a renovation site

An investor acquires, at a discount, a Paris office building constructed in the early 1970s, with a repositioning business plan over twenty-four months. The works contract is signed, the main contractor sets up the site facilities, and removal of the false ceilings reveals unrecorded pipe lagging. The labour inspectorate is notified, the site stops, and the marketing timetable slips by several quarters. This scenario is not a matter of chance: it results from a breach of a regulatory obligation that rests personally on the project owner (maître d'ouvrage), and not on the works contractor. This guide sets out the regime for the asbestos survey before works, the criminal and financial exposure of the contracting party (donneur d'ordre) who disregards it, and the remedies against the surveyor, the seller and the design and supervision team (maîtrise d'œuvre) when the loss has already occurred.

The asbestos survey before works rests on the contracting party, not on the contractor

Law No. 2016-1088 of 8 August 2016 on labour, the modernisation of social dialogue and the securing of career paths inserted into the French Labour Code Article L. 4412-2, which lays down a stand-alone obligation to search for asbestos on the contracting party.

The contracting party, the project owner or the owner of immovable property by nature or by destination, of equipment, materials or articles must have the presence of asbestos searched for before any operation involving risks of exposure of workers to asbestos (Article L. 4412-2 of the French Labour Code).

Decree No. 2017-899 of 9 May 2017 on the asbestos survey before certain operations specified this arrangement in Articles R. 4412-97 et seq. of the French Labour Code. The Order of 16 July 2019 on the asbestos survey before certain operations carried out in buildings, published in the Journal officiel of 18 July 2019, sets its operational terms: scope, competence of the surveying operator, content of the report, technical reference framework. Other sector-specific orders cover ships, aircraft, railway rolling stock, industrial installations and land.

An investor should draw three consequences.

The first is that the obligation is personal to the contracting party. Neither the signature of a fixed-price contract, nor the appointment of a main contractor, nor the involvement of a health and safety coordinator (coordonnateur SPS) transfers it. The project owner's liability for asbestos cannot be delegated by contract: at most it may give rise to an internal right of recourse, which cannot be set up against the prosecuting authority.

The second is that the notion of contracting party is wider than that of project owner within the meaning of the MOP law. It includes the owner, the operator, the tenant who has fit-out works carried out, and the asset manager acting on behalf of a fund. In a repositioning operation carried out through a dedicated vehicle, the precise identification of the contracting party determines the identification of the person criminally liable.

The third is that the obligation to carry out an asbestos survey before works is triggered by the operation, not by the nature of the property. Any intervention liable to expose workers, including a simple drilling, removal of a floor covering or replacement of a concealed service, falls within its scope.

Not confusing the four surveys

Confusion between the different asbestos documents is the leading cause of site incidents. Four arrangements coexist, with distinct legal bases and purposes.

The asbestos technical file (dossier technique amiante, DTA), governed by Articles R. 1334-14 et seq. of the French Public Health Code, applies to owners of multi-occupancy and commercial buildings for which the building permit was issued before 1 July 1997. It covers the materials in lists A (sprayed coatings, lagging, false ceilings) and B (building elements accessible without destructive works). Its purpose is the protection of occupants, not of workers.

The private parts asbestos file (dossier amiante parties privatives, DAPP) follows the same logic for dwellings.

The statement recording the presence or absence of asbestos, annexed to the preliminary sale agreement or the deed of sale under Article L. 271-4 of the French Construction and Housing Code, is an information document for the buyer. It does not amount to a survey before works. The content of the technical diagnostic file given to the buyer is presented in our article on mandatory diagnostics on the sale of real estate.

The asbestos survey before works, for its part, falls under the Labour Code. It is exhaustive as regards the scope of the planned operation, involves in-depth and, where necessary, destructive investigations, and must identify all the materials and products liable to release fibres given the works techniques chosen. A DTA concluding that there is no asbestos in the visible parts in no case dispenses with the survey before works: the two documents have neither the same material scope nor the same degree of investigation.

A survey before demolition, known as a list C survey, follows yet another logic of its own where the operation entails the disappearance of the structure.

The scope of investigation is defined by the works programme

The survey report has operational value only if the works programme was communicated to the surveyor with precision. A survey commissioned on the basis of a summary programme, then relied on for a site whose scope was extended in the PRO or EXE design phase, protects no one. In practice, the project owner must give the surveying operator the plans, the specifications, the sections and the envisaged working methods, and have the report record the zones not investigated and the reasons for not investigating them.

Where certain zones remain inaccessible, the report must say so expressly. The project owner then has a choice to make: schedule a supplementary survey before works, or treat the zone as containing asbestos, with the corresponding additional cost. The third option, which consists in ignoring the reservation, constitutes the established fault from which most of the criminal litigation stems.

The Labour Code finally requires the contracting party to pass the results of the survey on to every person called on to design or carry out the operation. This must happen from the tender stage, and not at the opening of the site: a report communicated after the bids have been submitted deprives the contract of its economic basis and mechanically opens a discussion on additional works.

The survey structures the timetable and the capex, it does not disrupt them

For an asset being repositioned, the question is not whether asbestos is expensive, but at what point that cost is identified. Built into due diligence, it is negotiated into the price. Discovered during the works phase, it has to be endured.

The real chronology of an operation involving asbestos includes minimum time limits that a serious business plan must build in from the acquisition offer:

• carrying out of the survey by a certified operator, including destructive sampling and analyses in an accredited laboratory;
• definition of the removal or encapsulation programme, which determines the works budget and may require design rework;
• consultation of certified contractors for the removal and encapsulation works, a much shallower market than that for ordinary finishing trades;
• transmission of the removal plan to the labour inspectorate, the regional health insurance fund (caisse régionale d'assurance maladie) and the OPPBTP (French construction industry accident prevention body), with a regulatory period of one month before the works start (Article R. 4412-137 of the French Labour Code);
• execution under containment, with dust level measurements, the occupational exposure limit being set at ten fibres per litre over eight hours by Article R. 4412-100 of the French Labour Code;
• visual inspection at the end of the works and clearance measurement before the zones are handed back;
• removal of asbestos waste through a dedicated channel, under a tracking slip.

This sequencing explains why a delay in the survey cannot be made up. The one-month period preceding the removal plan is an administrative procedure period, insensitive to the late-completion penalties stipulated in the contract.

The interplay with energy capex deserves particular attention. Law No. 2021-1104 of 22 August 2021 on combating climate change and building resilience, known as the Climate and Resilience law, prohibited the letting of dwellings rated G from 1 January 2025 and provides for the prohibition of dwellings rated F from 1 January 2028. The works that make it possible to move out of a poor energy rating, external insulation, façade refurbishment, window replacement, removal of false ceilings to run services, floor renovation, are precisely those that touch historically asbestos-containing materials: vinyl-asbestos tile adhesives, façade renderings, joints, glazing mastics, fibre-cement ducts. An energy renovation plan built without an asbestos component is an incomplete financing plan. The asset's usability over time depends as much on its energy performance certificate (DPE) trajectory as on the asbestos mapping.

The criminal exposure of the project owner who starts works without a survey

Breach of the survey obligation is not a mere administrative irregularity.

In the field of offences under the Labour Code, infringements of the regulatory provisions of the fourth part of the Code are punishable by the fine provided for in Article L. 4741-1 of the French Labour Code, in the amount of €10,000, applied as many times as there are workers concerned. In the event of a repeat offence, the penalty is increased to one year's imprisonment and a fine of €30,000. On a strip-out site with several dozen workers, the cumulative amount is significant.

Beyond that, failure to survey opens the way to the offence of endangering others under Article 223-1 of the French Criminal Code, which punishes with one year's imprisonment and a fine of €15,000 directly exposing another person to an immediate risk of death or injury likely to cause mutilation or permanent disability by the manifestly deliberate violation of a specific obligation of safety or prudence imposed by statute or regulation. The obligation to carry out an asbestos survey before works has exactly the characteristics of a specific obligation within the meaning of that provision: it is precise, written, and its debtor is designated. The deliberate nature is readily shown where the file establishes that the project owner held a DTA identifying asbestos-containing materials, or a survey report containing reservations on zones not investigated.

If exposure is established and a disease develops, the offences of unintentional injury under Articles 222-19 et seq. of the French Criminal Code become available, with the difficulties of proof specific to diseases with a long latency period. A legal entity is criminally liable under the conditions of Article 121-2 of the French Criminal Code, the maximum fine being multiplied by five under Article 131-38.

Temporary stoppage of works: the most immediate timetable risk

Article L. 4731-1 of the French Labour Code authorises the labour inspectorate's inspector to order the temporary stoppage of the works or the activity where the inspector finds a dangerous situation resulting in particular from the exposure of workers to a carcinogenic substance. Asbestos falls within that category. The decision takes immediate effect. Resumption requires that the employer has taken the necessary measures and that the inspector has recorded this.

For an investor, this is the most brutal risk, because it is detached from any debate on fault. The physical finding is enough. The knock-on effects are well known: loss of crane slots, demobilisation of teams, renegotiation of unit prices on resumption, slippage of the contractual completion date, activation of exit clauses in a lease in the future state of completion (bail en l'état futur d'achèvement), calling into question of the covenants of financing tied to a delivery timetable. Failure to comply with a decision for the temporary stoppage of works is also a criminal offence.

Quantifying the financial exposure

Three heads must be distinguished in assessing the loss, because they are not subject to the same regime.

The first is additional works cost. Where the contract is concluded on a fixed-price basis, Article 1793 of the French Civil Code in principle prohibits the contractor from claiming a price increase without written authorisation and agreed prices. But the discovery of unrecorded asbestos changes the very subject-matter of the work: removal falls within a separate contractor qualification, subject to certification. The debate then shifts to indispensable additional works, to unforeseen constraints where the contract provides for them, or even to revision for unforeseeability under Article 1195 of the French Civil Code if its conditions are met. Private works contracts frequently refer to standard NF P 03-001, whose provisions on technical hazards must be examined before any position is taken.

The second head is loss caused by delay: penalties owed to the tenant that has signed a lease in the future state of completion, loss of rent, prolonged financial carrying costs, additional design and supervision fees and construction damage insurance (assurance dommages-ouvrage) costs, interim interest. On a Paris commercial asset, this head often exceeds the technical cost of the asbestos removal itself.

The third head is insurance risk. Contractors' all risks and liability policies frequently contain exclusions or sub-limits relating to asbestos. A project owner who has not produced a compliant survey is exposed to forfeiture of cover on the ground of aggravation of the risk or failure to comply with a regulatory obligation. The special conditions must be examined before the works order, and not after the loss. The real extent of this cover is examined in our article on what contractors' all risks insurance covers where the contractor fails.

To this is added the knock-on effect of the employer's inexcusable fault (faute inexcusable), within the meaning of Article L. 452-1 of the French Social Security Code. A works contractor ordered to pay in respect of exposure of its employees will turn against the contracting party that did not pass a survey on to it, or passed on a survey with gaps.

The remedies open to the project owner

Against the surveying operator

The surveying operator acts as a certified professional, bound by an enhanced obligation of means whose performance the case law assesses severely. The courts consistently hold that the surveyor cannot shelter behind the material limits of its intervention where it has not issued an explicit reservation, nor behind a mission defined too narrowly if it has not alerted its client to the inadequacy of the scope. The most frequently upheld breaches are failure to carry out destructive sampling on materials whose suspect nature was detectable, failure to take samples from floor covering adhesives, and omission of investigations in service ducts.

The practical value of this action lies in the surveyor's professional liability insurance. It is still necessary to check the extent of cover, the ceilings and the exclusions, and to notify the claim in the proper form. An action brought against an uninsured or under-insured operator has a low recovery value.

Against the seller

A buyer who discovers after the sale an undisclosed contamination has several bases available, the interplay of which must be decided according to the evidence available.

The latent defects warranty (garantie des vices cachés) under Articles 1641 et seq. of the French Civil Code is the natural basis. The warranty exclusion clause, usual in deeds, is neutralised by Article 1643 of the French Civil Code where the seller knew of the defect, which is the case for a professional seller, and may be the case for a seller holding a DTA recording the presence of asbestos. Above all, Article L. 271-4 of the French Construction and Housing Code deprives the seller of the benefit of the exoneration clause where the statement on the presence of asbestos was not produced or was no longer valid.

Fraud (dol) under Article 1137 of the French Civil Code is relevant where the seller concealed an unfavourable survey report or produced a truncated document. In addition to damages, it opens the way to nullity, a powerful negotiating lever in an operation under way.

Breach of the pre-contractual duty of information under Article 1112-1 of the French Civil Code usefully completes the arrangement, in particular where the seller held a history of works that was not communicated.

Against the design and supervision team and the project owner's assistant

The design architect who prepares a tender file without including the asbestos component, and the project owner's assistant (assistance à maîtrise d'ouvrage, AMO) who runs a technical due diligence without warning of the absence of a compliant survey, incur contractual liability. The argument drawn from the project owner's personal obligation does not exonerate them: their mission includes a duty of advice whose breach contributes to the loss. The outcome is generally a sharing of liability, which reduces without eliminating the contracting party's net exposure.

Summary proceedings for an expert appointment, the first step of any strategy

None of these remedies succeeds without an adversarial technical finding. Article 145 of the French Code of Civil Procedure makes it possible to obtain, before any trial, the appointment of a court-appointed expert where there is a legitimate reason to preserve or establish evidence of facts on which the outcome of a dispute may depend. Where asbestos is discovered during a site's progress, the application or the summons in summary proceedings (référé) must be filed without delay, for three reasons: the materials in dispute are going to be removed and destroyed by the removal works, successive takeovers of contractors make it harder to bring them in as time passes, and the measure usefully interrupts the discussion on attribution. The expert appraisal must be directed at all the parties involved, surveyor, seller, design architect, contractor, on pain of the report being unenforceable against them. The conduct of expert operations and the discussion of the draft report are dealt with in our article on court-appointed expert appraisal in real estate.

Securing matters in advance: what the investor must require before signing

Preventing asbestos risk in an acquisition and repositioning operation rests on a few simple requirements, too often sacrificed to the speed of execution of a deal.

Commission a works-oriented survey from the due diligence phase, and not only the sale statement, where the business plan provides for heavy works. The cost is marginal in relation to the acquisition budget and it is negotiated into the price.

Obtain from the seller full communication of the history: DTA and its updates, previous survey reports, removal plans and completion certificates for past operations, waste tracking slips. A partially de-asbestosed building is often more complex to deal with than an intact one, because the residual mapping is uncertain.

Stipulate in the deed a specific asbestos warranty, backed by an escrow or an on-demand guarantee, separate from the general assets and liabilities warranty, with a duration aligned with the works timetable and not with a standard duration of eighteen or twenty-four months.

In the works contract, insert a clause allocating asbestos hazards that expressly designates the reference document, the scope investigated and the treatment of discoveries outside that scope, so as to fix ex ante the regime for additional works rather than leaving it to litigation.

Finally, make the issue of the works commencement order conditional on production of the complete survey report and of the record of its transmission to the contractors. This formality, which costs one signature, is the cornerstone of the contracting party's criminal defence.

Conclusion

The asbestos survey before works is not one diagnostic among others in a sale file: it is a personal obligation, non-delegable and subject to criminal penalties, which conditions the legal feasibility of the site. Treating it as an administrative formality to be regularised during the operation amounts to accepting a risk of a discretionary site stoppage, loss of control of the timetable and criminal exposure of the manager as well as of the legal entity.

The position we put forward is as follows: on an asset whose building permit predates 1 July 1997 and which is the subject of a repositioning project, the survey before works belongs to acquisition due diligence, not to the execution phase. It is negotiated into the price, it is financed in the capex plan, it is not something to be endured.

If the operation is already under way and asbestos has been discovered, two steps condition everything else: having a court-appointed expert appointed under Article 145 of the Code of Civil Procedure before the materials in dispute are removed, and notifying a claim declaration without delay to all the insurers concerned, including the surveyor's. Once the strip-out has taken place, the evidence disappears with the materials.

Frequently asked questions

Does a recent DTA dispense with the asbestos survey before works? No. The asbestos technical file falls under the Public Health Code and aims at protecting occupants; it covers the materials in lists A and B, accessible without destructive investigation. The survey before works falls under the Labour Code, in Articles L. 4412-2 and R. 4412-97, and must cover all the materials liable to be affected by the works programme, including by destructive sampling. A DTA is, at best, only an input for the survey.

Who is liable if the works contractor discovers unrecorded asbestos? The obligation to have asbestos searched for rests on the contracting party, the project owner or the owner. The contractor must immediately suspend the work and inform the contracting party, but it does not take the contracting party's place in performing the regulatory obligation. The project owner remains exposed to the penalties of Article L. 4741-1 of the French Labour Code and, depending on the circumstances, to the offence of endangering others under Article 223-1 of the French Criminal Code, unless it can show that the survey was complete and that the material was undetectable.

Is a survey mandatory for a building constructed after 1997? The Order of 16 July 2019 limits its scope to buildings for which the building permit was issued before 1 July 1997, the reference date linked to the ban on asbestos resulting from Decree No. 96-1133 of 24 December 1996. For later constructions, a survey is not required by regulation. Caution nevertheless remains for sites completed in the years immediately following, since stocks of materials may have been used, and for buildings that have been extended or reconfigured using reclaimed elements.

What period should be allowed between the survey and the actual start of removal works? Allowance must be made for the time taken by the survey itself, including analyses in an accredited laboratory, then the consultation of certified contractors, then the regulatory period of one month imposed by Article R. 4412-137 of the French Labour Code for transmission of the removal plan to the labour inspectorate, the regional health insurance fund and the OPPBTP. These periods cannot be shortened by a contractual clause. An operation schedule that does not isolate them as a stand-alone critical path is unrealistic.

What remedies are there against a surveyor whose report was incomplete? An action in contractual liability against the certified surveying operator is the main basis, the case law assessing rigorously the duty of advice and the obligation to flag any zone not investigated. The extent and ceilings of its professional liability insurance, which determine the real value of the claim, should be checked immediately. The action should be preceded by a court-appointed expert appraisal ordered under Article 145 of the Code of Civil Procedure, to which the surveyor and its insurer must be summoned.

Does the latent defects warranty exclusion clause protect a seller who did not disclose the asbestos? It is set aside in at least three situations. First, if the seller is a real estate professional, whose bad faith is presumed within the meaning of Article 1643 of the French Civil Code. Second, if the seller actually knew of the defect, which the production of a DTA or earlier reports often reveals. Finally, Article L. 271-4 of the French Construction and Housing Code deprives the seller of the benefit of the clause where the asbestos statement was not annexed or was no longer valid on the date of the deed.

Can a site stoppage ordered by the labour inspectorate be challenged quickly? A decision for the temporary stoppage of works taken under Article L. 4731-1 of the French Labour Code is immediately enforceable. The quickest route is generally not contentious: it consists in implementing the corrective measures without delay, documenting them and asking the inspector to record that the works may resume. A court challenge remains possible, but its timetable is rarely compatible with the economic stakes of a site at a standstill.