An Energy Performance Certificate (EPC) is a document rating a building's energy efficiency and environmental impact, typically on an A-to-G scale or similar system. EPCs provide standardized information allowing comparison between buildings, helping buyers, renters, and owners understand energy costs and improvement opportunities. While EPCs are mandatory for real estate transactions in many European countries, Canada uses different approaches: EnerGuide home evaluations rate residential efficiency, while various commercial building certifications assess non-residential performance. Some Canadian jurisdictions are moving toward mandatory energy disclosure or performance labelling for buildings. Advocates argue that EPCs drive market demand for efficient buildings and inform improvement investments. Critics raise concerns about assessment costs and accuracy. Building energy performance disclosure is an evolving policy area as governments address building-sector emissions.