The proposed bill introduces the "Building Decarbonization Act of 2025," which establishes a building energy reporting program for covered properties. The Office of Energy Resources (OER) will be responsible for overseeing the collection and public reporting of energy use data for covered properties, defined as residential and non-residential buildings and campuses with a gross area of 25,000 square feet or more.

Property owners will be required to input their annual energy usage and other relevant information into a benchmarking tool, such as the ENERGY STAR Portfolio Manager, by specific deadlines based on the size of the building: by May 15, 2027, for buildings with 50,000 or more gross square feet, and by May 15, 2029, for buildings with 25,000 to 49,999 gross square feet. New covered properties will begin reporting after their first full calendar year of occupancy.

The OER will notify property owners of their obligations between September 15 and December 15 each year, starting in 2026, and will publish a list of covered properties by January 31 of each year beginning in 2027. The OER will also host annual information sessions for building owners and other interested parties.

Exemptions from the reporting requirements may be granted under certain conditions, such as if the property was unoccupied for the entire year or if a demolition permit was issued. Applications for exemptions must be submitted to the OER with supporting documentation.

Owners are required to provide benchmarking information to the OER annually, and the OER will publish a summary report on the program by October 15 each year, starting in 2026. This report will include benchmarking information, progress against baseline data, and compliance status of covered properties.

The act allows property owners to authorize energy utilities or third parties to report energy data on their behalf. Municipalities that have established comparable benchmarking programs prior to this act may continue those programs, provided they notify the OER.

The OER will develop incentives for participation in the benchmarking program, which may include requirements for grant funding applications. Enforcement mechanisms, including escalating warnings and fines, may be implemented starting in 2030. The act emphasizes transparency and aims to improve energy efficiency and reduce greenhouse gas emissions in the building sector.