CA AB2555

Requires the California Building Standards Commission to adopt regulations and mandatory building standards for installing water conserving plumbing fixtures in existing nonresidential and public buildings by January 1, 2022.

Defines "water conserving plumbing fixtures" as toilets, urinals, and faucets that comply with California's Appliance Efficiency Regulations.

Exempts from retrofit requirements existing toilets, urinals, and faucets less than five years old, and replacement fixtures must be at least 50 percent more water efficient than existing ones.

Allows the commission to expend funds from the Building Standards Administration Special Revolving Fund to develop and adopt the regulations and standards.

Authorizes adopted standards to supersede conflicting provisions in the California Civil Code related to building standards.