This talk will focus on compliance checks regarding the energy performance regulation RT 2000 and the way they are performed in France. The speaker will present an overview of the approach developed and used which consists in collecting calculation details provided by consultants; visiting the construction site when the insulation is installed; and visiting the building at commissioning. The compliance to the EP-regulation is analyzed at each of those steps. The results of assessment performed on 13 service sector buildings, 8 multi-family buildings, and 15 single-family houses will be discussed. Globally, they show that although there may be significant discrepancies between stated and actual conventional energy performance, most residential buildings in this sample comply with the EP-regulation.