The "Building Decarbonization Act of 2025" is a legislative proposal aimed at reducing greenhouse gas emissions from buildings in Rhode Island, in line with the state's climate objectives. The bill introduces new legal language by adding Chapter 27.5 to Title 23 of the General Laws, which includes definitions for terms such as "anonymized and aggregated usage data," "building performance standard," and "covered property," with "covered property" defined as buildings with at least 25,000 square feet of gross floor area. It establishes a Building Performance Standard Fund to support the implementation of energy efficiency standards and mandates that new constructions be "electric-ready." The bill also outlines the responsibilities of the Executive Climate Change Coordinating Council (EC4) in managing energy use benchmarking for large buildings, ensuring compliance with performance standards, and providing technical assistance to building owners.

Additionally, the bill creates an Environmental Justice Advisory Board (EJAB) to advise the EC4 on climate change impacts, particularly for communities facing environmental injustices. It mandates that electric distribution companies provide anonymized energy usage data to property owners and requires municipalities to implement building energy benchmarking with EC4 approval. The legislation emphasizes equitable engagement by compensating EJAB members for their contributions and outlines compliance measures, including penalties for violations and the establishment of interim performance standards. The bill also specifies that all new buildings must be "electric-ready," ensuring they can accommodate future energy needs, and sets deadlines for compliance and reporting, with the act taking effect upon passage.