Chrono Diagnostic is a real estate diagnostic company in Île-de-France. Diagnostics are intended to ensure the security and information of the parties involved in the transaction.

For rental, the mandatory diagnostics are: Electricity, Gas, Energy Performance Diagnostic (DPE), Asbestos, Lead, Risk and Pollution Status (ERP), and Measurement. For sales, only measurement, energy and termite diagnostic are required, in accordance with municipal decrees. The duration of a diagnosis varies depending on the nature of the file.