The bill aims to enhance energy efficiency and reduce greenhouse gas emissions in existing residential buildings in Washington State by establishing a home energy labeling program. It recognizes the importance of providing homebuyers with information about energy efficiency and emissions to facilitate informed decision-making and improve market valuation of energy-efficient homes. The legislation introduces a requirement for owners of single-family residences to obtain and make available a home energy performance report before the property can be publicly advertised for sale. This report must include various details such as a home energy score, estimates of energy usage and costs, greenhouse gas emissions, and recommendations for efficiency improvements.

Additionally, the bill mandates that cities and counties conduct a financial impact analysis to mitigate costs for low-income home sellers before implementing the home energy performance report requirement. The reports must be prepared by certified home energy auditors and adhere to a standardized format developed by the Department of Commerce by November 30, 2024. This initiative is designed to promote transparency in energy consumption and encourage energy-efficient practices among homeowners.