Building expertise Lyon


An Expert is a qualified professional, experienced in the scientific or technical matters of their speciality, recognized by the professional world they belong to, and by the law.

Does your building, house or apartment have a crack, infiltration or defect? BAU 3E carries out the appraisal of your building in Lyon and in the Region Rhône-Alpes.

Our missions are carried out with "conscience, impartiality and objectivity" in accordance with Article 237 of the Code of Civil Proceedings.

Working Methodology


Once the quote is agreed upon, the expert BAU 3E will:

  • Visit your property,
  • Note down the flaws and/or defects,,
  • Gather your documents and/or pieces of evidence, cross-check findings against the standards, against the technical rules in force, against the town planning rules. etc
  • Estimate the recovery measures to be considered,
  • Prepare and send a clear and illustrated report.

Professional equipment


  • Technical: moisture meter, fissurometer, thermal camera, lasermeter and other useful tools,
  • Computer: IMac OS, Archicad, InDesign, Office Pack with Word/Excel/ Acrobat Pro/ Photoshop / PowerPoint,
  • Multifunction laser printer