The bill aims to address the housing shortage in Washington by prohibiting cities and counties with populations of 30,000 or more from excluding residential uses in areas zoned for commercial or mixed-use development. This prohibition is subject to certain exceptions, including areas near industrial zones, oil or gas refineries, historic landmarks, and critical areas. Additionally, the bill stipulates that cities and counties cannot require mixed-use or ground floor commercial space as a condition for permitting residential development in more than 40% of the total acreage in commercial zones. For publicly subsidized affordable housing projects, similar restrictions apply, ensuring that residential development can proceed without the burden of commercial requirements.

The legislation also establishes an administrative process for cities and counties to consider requests for waivers from ground floor commercial use regulations, while maintaining the ability to impose minimum density requirements. It sets a timeline for compliance, stating that local governments must adopt or amend relevant ordinances within 18 months of the bill's effective date, or else the new requirements will supersede any conflicting local regulations. The bill emphasizes that it does not require local governments to invalidate existing permits or update growth assumptions until their next comprehensive plan update after January 1, 2031.