France, What Developers & Contractors Must Know About the 2026 Finance Act: Construction Contracts, Decennial Liability and Construction Insurance

The 2026 Finance Act (Loi de finances pour 2026) has reshaped the commercial landscape for construction contracts in France, introducing tax adjustments, revised vacant-property levies and new thresholds for private-landlord status that directly affect project cashflows, risk allocation and insurance placement. While the Act does not overhaul the statutory framework for decennial liability, it changes the economic assumptions that underpin every development contract, from milestone payments and liquidated-damages clauses to the timing and scope of construction insurance. This guide delivers a practical, clause-level playbook for developers, contractors, project owners and in-house counsel who need to update their contracts and insurance programmes now.

Executive Summary, Immediate Actions for Developers & Contractors

Developers and contractors operating under French construction contracts should treat the 2026 Finance Act as a trigger for a comprehensive contract and insurance audit. The legislative changes do not wait for project completion: they affect ongoing and future projects alike. The following actions should be prioritised immediately.

Industry observers expect the practical effect of these changes to be most acute for mixed-use developments and build-to-rent projects, where the interaction between vacant-property tax, landlord-status thresholds and construction delivery timelines creates compounding financial risk.

What in the 2026 Finance Act Matters to Construction Contracts in France

The 2026 Finance Act is primarily a fiscal instrument, but several of its provisions have direct consequences for construction project economics and, by extension, for the drafting and negotiation of french construction contracts. The headline measures relevant to developers and contractors fall into three categories: tax incentive adjustments, vacant-property and holding-cost rules, and changes to landlord-status thresholds that affect exit strategies.

The Finance Act was adopted under the procedures set out in the French Constitution and published in the Journal officiel. Developers should consult the official text on Legifrance and the summary guidance issued by the Ministry of Economy and Finance. Early indications suggest that the most commercially sensitive provisions, particularly the expanded vacant-property tax, took effect from the start of the 2026 fiscal year, meaning projects already in the pipeline face immediate exposure.

Contract Forms and Baseline Obligations, How French Construction Contracts Allocate Risk

Understanding the baseline risk-allocation framework is essential before layering on 2026-specific updates. France offers several standard contract forms, each distributing decennial liability, payment risk and delivery obligations differently. The choice of contract form determines who bears the cost if the Finance Act changes make a project more expensive or less commercially viable than originally modelled.

Which contract model is best for allocating decennial risk?

There is no single “best” model, the answer depends on the project’s commercial structure. For residential consumer projects, the CCMI provides the highest level of statutory protection and is mandatory for single-dwelling builds. For commercial developments, the contrat d’entreprise gives parties the most flexibility to negotiate risk allocation, indemnities and insurance procurement obligations. The CPI is favoured where a landowner wishes to retain title while delegating all development risk. For a detailed comparison of these models, see our construction law glossary of terms. Regardless of the chosen form, all parties must comply with mandatory decennial liability rules, which cannot be contracted out of for the categories of works covered by the Code civil.

Decennial Liability (Garantie Décennale), Legal Baseline, Insurance and Practical Steps After 2026

The garantie décennale is the cornerstone of construction risk management in France. It imposes strict liability on builders, contractors and certain design professionals for serious structural defects that render a building unfit for its intended purpose, or that compromise its structural integrity, for a period of ten years from acceptance (réception des travaux). The statutory basis is found in Articles 1792 to 1792-6 of the Code civil, as published on Legifrance.

The 2026 Finance Act did not amend the statutory framework for decennial liability in France. The liability rules, the ten-year prescription period and the categories of protected works remain unchanged. However, the commercial context has shifted: higher holding costs (via the vacant-property tax), altered return profiles (via landlord-status thresholds) and revised tax incentives all change the economic consequences of defects, delays and claims. This means that while the legal exposure is the same, the financial stakes of a decennial claim are now higher for many projects.

Practical clauses for managing garantie décennale risk

Note: model clauses are examples and do not substitute for legal advice. All clauses should be reviewed by qualified French construction counsel before inclusion in any contract.

• Insurance evidence clause: “The Contractor shall, no later than [date / contract signature], provide to the Owner a valid attestation d’assurance de responsabilité décennale issued by a duly authorised insurer operating in France. Failure to provide or maintain such evidence shall constitute a material breach entitling the Owner to suspend payments and, after [X] days’ notice, to terminate the Contract.”
• Subcontractor flow-down clause: “The Contractor shall ensure that each Subcontractor holds and maintains a garantie décennale policy covering the Subcontractor’s scope of works. The Contractor shall provide copies of all Subcontractor insurance certificates to the Owner within [X] business days of each Subcontractor’s appointment.”
• Post-completion obligations clause: “For the duration of the ten-year garantie décennale period, the Contractor shall (a) maintain its décennale insurance policy in force; (b) notify the Owner promptly of any claim, potential claim or insurer correspondence; and (c) cooperate fully with the Owner’s dommages-ouvrage insurer in the investigation and resolution of any covered event.”

For further guidance on claiming compensation for developer delays, including how delay interacts with decennial exposure, consult the linked analysis.

Construction Insurance in France, Placement, Coverage Gaps and Claims Process

The construction insurance France regime is among the most prescriptive in Europe. Two categories of insurance are mandatory by law: the contractor’s garantie décennale policy and the owner’s dommages-ouvrage policy. Beyond these statutory minimums, prudent project participants procure additional cover to address gaps, particularly Contractor’s All Risks (CAR), third-party liability and professional indemnity policies.

The 2026 Finance Act’s commercial impacts make it essential to review insurance placement timing and adequacy. Higher holding costs mean that any delay in claims resolution or gap in cover translates directly into increased financial exposure. The following checklist should be used as a baseline for all current and future projects.

Post-2026 insurance action checklist

• Review sum insured: Confirm that policy limits reflect current rebuild costs, which may have increased due to supply-chain inflation and regulatory compliance costs.
• Check subrogation waivers: Ensure that the dommages-ouvrage policy includes appropriate subrogation rights against contractors and subcontractors, and that CAR policies include mutual subrogation waivers between co-insureds.
• Verify mid-policy change provisions: Confirm that policies allow for scope changes, additional phases and extensions of the construction period without requiring full re-underwriting.
• Notify insurer of Finance Act changes: Where project economics or use-class have changed (e.g., from sale to rental), notify insurers promptly to avoid coverage disputes.
• Confirm insurer solvency: Use ACPR registers to verify that all insurers are authorised and solvent. The Fédération Française de l’Assurance publishes market guidance on construction insurance practice.
• Premium allocation: Agree contractually which party bears insurance premiums and how cost increases are allocated (fixed cap, index-linked or pass-through).

Contract Drafting Checklist, Clauses to Update for Construction Contracts in France

The following clause-level updates reflect the combined impact of the 2026 Finance Act and current market conditions. They apply across all major contract forms and should be adapted to the specific project structure and negotiation dynamics.

Note: model clauses are examples and do not substitute for legal advice.

• Scope and variations: “Any variation to the Works required by changes in applicable law, regulation or tax treatment (including but not limited to measures introduced by the Loi de finances pour 2026) shall be treated as a Relevant Change and shall entitle the affected party to an equitable adjustment of the Contract Price and/or the Programme, subject to notification within [X] days.”
• Completion and delivery: “The Contractor shall achieve Practical Completion by [date]. Time is of the essence. Delayed completion shall trigger liquidated damages at the rate of [€X] per calendar day, without prejudice to the Owner’s right to claim general damages where loss exceeds the liquidated amount.”
• Delay and liquidated damages: Include a clear pre-estimate of loss that factors in the increased holding costs arising from the vacant-property tax. Ensure the liquidated-damages rate is commercially reasonable and defensible under French law.
• Force majeure and regulatory change: “Force Majeure shall include any event beyond the reasonable control of the affected party, including changes in law or regulation that materially affect the cost or feasibility of performance. The affected party must give notice within [X] days and use all reasonable endeavours to mitigate the impact.”
• Insurance requirements: “The Contractor shall procure and maintain at its cost (a) a garantie décennale policy; (b) a CAR/All Risks policy naming the Owner as co-insured; and (c) third-party liability insurance with a minimum limit of [€X]. Evidence of all policies shall be provided as a Condition Precedent to the first payment.”
• Indemnities: “The Contractor shall indemnify and hold harmless the Owner against all losses, costs and liabilities arising from the Contractor’s breach of any warranty, including any failure to maintain insurance cover or any act or omission giving rise to decennial liability.”
• Retention and lien mechanism: “The Owner shall retain [5%] of each interim payment certificate until [12 months] after Practical Completion. Release of retention shall be conditional upon the Contractor providing updated garantie décennale certificates and resolving all snagging items.”
• Insolvency and termination: “Either party may terminate the Contract forthwith by notice if the other party enters into insolvency proceedings, ceases trading, or fails to maintain mandatory insurance cover for a period exceeding [X] days after notice.”

For definitions of key construction law terms used in these clauses, consult the construction law glossary.

Commercial and Tax Consequences, Vacant-Property Tax, Private-Landlord Status and Modelling Implications

The 2026 Finance Act’s fiscal measures create a direct link between tax policy and construction contract risk. Developer obligations in France now extend beyond building and delivering a compliant structure: developers must also factor holding-cost exposure and investor tax treatment into their contractual commitments. Two measures deserve particular attention.

Vacant-property tax and holding-cost risk

The expansion of the taxe sur les logements vacants to additional communes and the revision of rate bands mean that unsold or unlet units carry higher annual costs. For developers holding completed stock, this directly affects cashflow and return calculations. The likely practical effect will be to accelerate disposal timelines and increase pressure on construction delivery schedules.

Private-landlord status and rental thresholds

Changes to the thresholds distinguishing loueur en meublé non professionnel (LMNP) from loueur en meublé professionnel (LMP) status, and revised reporting obligations for furnished-rental income, affect the tax efficiency of build-to-rent and holiday-rental projects. Developers marketing units to investor-buyers must update forward-sale warranties and investor representations to reflect the current regime.

Developers should work with tax advisers to remodel project feasibility under the current regime. Industry commentary from firms such as KPMG and Grant Thornton provides useful analysis of the Finance Act’s tax impacts.

Implementation Roadmap and Negotiation Playbook

The following 12-week roadmap assigns specific actions to the responsible parties. It is designed for a developer or main contractor managing an active or imminent project and should be adapted to project-specific timelines.

For a broader directory of construction and real estate specialists, visit the Global Law Experts lawyer directory.

Conclusion, Protecting Your Position Under Construction Contracts in France

The 2026 Finance Act has not rewritten the rules of French construction law, but it has materially changed the economic environment in which construction contracts in France are negotiated, performed and enforced. Higher holding costs, revised landlord-status thresholds and adjusted tax incentives create new pressure points in every contract, from payment milestones and liquidated damages to insurance placement and exit-strategy provisions. Developers and contractors who act promptly to audit their contracts, update their insurance programmes and recalibrate their financial models will be best positioned to manage risk and protect returns in the current regulatory landscape.

Sources

1. Legifrance, French legislation database
2. Service-public, Contracts & consumer protections (CCMI)
3. Ministry of Economy & Finance, France
4. ACPR / Banque de France, Insurance regime guidance
5. Fédération Française de l’Assurance (FFA)
6. DLA Piper Real World, France construction forms and procurement
7. Grant Thornton, Finance Act 2026 commentary
8. KPMG, Tax and policy analysis