Cassini Expertise works throughout the Bouches-du-Rhône (13) département: Marseille, Aix-en-Provence, Martigues, La Ciotat, Aubagne, Istres, Salon-de-Provence, Arles and every other commune. We carry out building expert assessments, off-plan purchase (VEFA) diagnostics and second-opinion expert assessments, and we support lawyers, with the same method and the same independence as in the Alpes-Maritimes (06) and the Var (83).
Our services in the Bouches-du-Rhône
Off-plan purchase expert assessment
We assist buyers at handover of a property bought off plan or under a house-building contract (CCMI): checking compliance with the contract and the plans, drawing up the snagging list, measuring the Carrez area, detecting building defects and hidden defects, and following up until the snagging items are cleared.
Crack and clay shrink-swell diagnostics
Crack mapping, crack-monitoring, examination of clay soils, drainage and vegetation, followed by a written report on the probable causes. It makes it possible to establish the link between drought and the damage, in order to call on the ten-year builder’s warranty (garantie décennale) or to file a natural-disaster insurance claim (CATNAT). You can check how exposed your commune is on our clay shrink-swell (RGA) map.
Poor workmanship and damp
A technical report with repair costings, and a measurement-based diagnosis of damp (condensation, rising damp, water ingress) before any treatment. Cassini Expertise does not sell building work or equipment.
Second-opinion assessments and support for lawyers
We assist lawyers in court-supervised expert assessments: analysing reports, drafting written technical submissions to the court expert (« dires »), and attending adversarial meetings. We act before the courts of Marseille, Aix-en-Provence and Tarascon, and on appeal before the Aix-en-Provence Court of Appeal.
Areas we cover in the Bouches-du-Rhône
- Marseille (13000)
- Aix-en-Provence (13100)
- Martigues (13500)
- La Ciotat (13600)
- Istres (13800)
- Salon-de-Provence (13300)
- Vitrolles (13127)
- Marignane (13700)
- Arles (13200)
- Gardanne (13120)
- Cassis (13260)
Frequently asked questions
Do you cover the whole of département 13?
Yes. We cover the Bouches-du-Rhône, from the Aix region to Marseille, and from the Étang de Berre to the Camargue.
How do I get a quote?
The quote is free and carries no obligation, with a reply within 24 hours: 04 22 46 06 04 or contact@cassini-expertise.fr.
Can your report be used in court?
It can be used in proceedings as evidence, subject to discussion by the parties, but it does not replace a court-supervised expert assessment. It is the technical document that supports your case.
Cassini Expertise – Independent building expert in the Bouches-du-Rhône (13). Request a quote →
Discover our areas of expertise
Cassini Expertise works in the 06, 83 and 13 départements:
- Off-plan purchase (VEFA) expert assessment – handover assistance and disputes
- Crack and clay shrink-swell (RGA) diagnostics
- Building second opinion – construction-damage insurance and court-supervised expert assessment
- Clay shrink-swell and CATNAT expert assessment – drought compensation
- Support for lawyers in court-supervised expert assessments
📅 Last updated 17/10/2026 - Cassini Expertise, independent building expert – departments 06, 83 and 13.