Washington’s Clean Buildings Law Deadline Is Here — Large Commercial Buildings Must Report by June 2026

Washington state’s Clean Buildings Performance Standard is no longer a future concern — it’s a present compliance obligation, and the clock is ticking for commercial building owners across the state. Owners of buildings exceeding 50,000 square feet should be well into compliance preparation, with the first mandatory energy performance reports due by June 2026, while Tier 2 buildings between 20,000 and 50,000 square feet — including large apartment complexes — have a 2027 compliance deadline but can voluntarily submit energy data now to receive incentives or extended timelines. The law requires meeting specific energy use intensity targets or implementing all cost-effective energy efficiency measures, and many multifamily owners are now scrambling to schedule energy audits, upgrade aging heating systems, and add insulation or smart controls to improve efficiency. For commercial contractors and MEP trades in Washington, the Clean Buildings law represents a significant and sustained pipeline of retrofit and energy upgrade work across the state for years to come. Washington State Department of TransportationWashington State Department of Transportation

Source URL: https://www.hfore.com/washingtons-2025-housing-reforms-unlock-new-multifamily-potential/