Do you dispute an insurance expert’s report, or want the help of an independent party-appointed expert in a court-supervised expert assessment? Cassini Expertise carries out second-opinion expert assessments in the Alpes-Maritimes and the Var.
Our service
Second opinion on construction-damage insurance (dommages-ouvrage)
Analysis of the insurer’s expert report, a second diagnosis, and an adversarial report to challenge a refusal of cover.
Party-appointed expert assessment (for lawyers)
- Technical analysis of the file before the hearing
- Drafting written technical submissions to the court expert (« dires »)
- Attendance at adversarial meetings
- Critical review of the expert report
- Costing of losses
Challenging a court-supervised expert assessment
Critical analysis of the report, identification of technical errors, and drafting of a reasoned submission for the judge.
Areas of intervention
- Ten-year builder’s warranty (garantie décennale) and construction-damage insurance
- Off-plan purchases (VEFA) – building defects, non-compliance
- Cracks and clay shrink-swell (RGA)
- Defects appearing after handover
Cassini Expertise – Building second opinion 06/83/13. Request a quote →
In construction, disputes are frequent and can have serious financial and legal consequences. Whether you are a private individual, a developer, a builder or an insurance company, a building second opinion in the Alpes-Maritimes (06), the Var (83) and the Bouches-du-Rhône (13) is a crucial step in defending your interests. Our independent expert practice supports you through construction-damage insurance claims and court-supervised expert assessments.
What is a building second opinion?
A building second opinion is a procedure that allows you to challenge the conclusions of an initial expert assessment, whether amicable (out-of-court) or court-appointed. It is often needed when the insured party considers the expert report incomplete, wrong or an underestimate of the losses. Under construction-damage insurance, the project owner can request a second opinion in order to obtain fairer compensation. In a court-supervised expert assessment, a party requests one to bring a technical, adversarial viewpoint.
Construction-damage insurance: why a second opinion?
The purpose of construction-damage insurance is to pre-finance repairs to defects covered by the ten-year builder’s warranty. However, the expert appointed by the insurer sometimes understates the extent of the damage or proposes inadequate technical solutions. In that case, an independent second opinion makes it possible to:
- Check that the expert report is consistent with the defects observed.
- Assess accurately the cost of the repairs required.
- Identify the parties responsible and the warranties that can be called upon.
- Negotiate fair compensation with the insurer.
A concrete example: An owner finds significant cracks in the walls of their villa in Nice. The expert for the construction-damage insurer concludes that a simple skim coat is enough. Our second opinion reveals a foundation defect requiring underpinning works, which multiplies the compensation amount by three.
Court-appointed expert assessment: the role of the second-opinion expert
When a dispute goes before the courts, the judge appoints a court expert to inform the decision. The parties may be assisted by a technician of their choice, known as a « technical adviser » or « second-opinion expert ». This professional:
- Analyses the court expert’s report and points out any contradictions or omissions.
- Assists the client during the expert assessment (meetings, site visits).
- Drafts written submissions and technical notes to challenge the conclusions.
- Puts forward a sound argument to defend the client’s interests.
In départements 06, 83 and 13, our practice responds quickly to any type of defect: cracks, water ingress, poor workmanship, non-compliance and so on.
Why use an independent expert?
Independence is the key to a credible second opinion. Cassini Expertise is not tied to any insurer, builder or developer. It works with complete impartiality, with the sole aim of establishing the technical facts. In addition, our knowledge of local specifics (seismic risk, clay shrink-swell, the Mediterranean climate) allows us to adapt our analyses.
Our areas of intervention
- Residential buildings: houses, co-ownership (condominium) properties, apartment buildings.
- Commercial and industrial buildings: business premises, warehouses, offices.
- Civil engineering structures: car parks, roads, utility networks.
- Specific defects: cracks, subsidence, water ingress, waterproofing defects, technical non-compliance.
How a second-opinion assignment works
- First contact: Analysis of your situation and your documents (contract, expert report, photos).
- Site visit: Detailed examination of the defects, surveys, measurements and samples where necessary.
- Report writing: A detailed report with conclusions, costings and recommendations.
- Support: Assistance at expert assessment meetings, in negotiations with the insurer or in court proceedings.
Contact us
For any building second-opinion request in the Alpes-Maritimes (06) or the Var (83), Cassini Expertise is at your disposal.
Telephone: 04 22 46 06 04
Email: contact@cassini-expertise.fr
Address: 22 rue Vauban, 06600 Antibes
* This article is provided for information only and does not constitute legal advice. For personalised advice, please contact us.
Related articles
- Ten-year builder’s warranty and construction-damage insurance: how compensation works when there are defects
- Hidden defects in a sale: the guarantee under Article 1641 of the Civil Code
- Defects found during construction: stop, document, act
Discover our areas of expertise
Cassini Expertise works across the 06, 83 and 13 départements:
- Off-plan purchase (VEFA) expert assessment 06, 83 and 13 – handover assistance and disputes
- Crack and clay shrink-swell (RGA) diagnostics 06, 83 and 13 – PACA region
- Building second opinion 06, 83 and 13 – construction-damage insurance and court-supervised expert assessment
- Clay shrink-swell and CATNAT expert assessment 06, 83 and 13 – drought compensation
- Support for lawyers in court-supervised expert assessments 06, 83 and 13
Further resources
- Building second opinion: when and how to request one
- Insurance expert assessment of construction claims – the expert’s role
- Challenging a court-appointed expert report | Remedies and procedure
Further resources
Also explore
- Support in court-supervised expert assessments
- Construction-damage insurance expert assessment
- Building expert assessment guide, PACA region
📅 Last updated 17/10/2026 - Cassini Expertise, independent building expert – departments 06, 83 and 13.