CA AB2230

Expands the Cartwright Act to include residential housing by defining "trust" to encompass affiliated persons (related within third degree of kinship, officers, directors, shareholders with 20%+ ownership) and adds residential housing to prohibited practices including price fixing, limiting competition in development/construction/leasing/rental, and restricting housing supply.

Defines key terms for housing enforcement including "residential housing" (dwelling units, housing development projects, and structures zoned for noncommercial housing), "geographic market" (census tracts, ZIP codes, urbanized areas, or one-mile radius), and "undue concentration" (control of more than 3% or 1,000 units by affiliated persons in any geographic market).

Amends the Unfair Practices Act to cover residential housing by changing "sell" to "sell or lease" and expanding the definition to include rental and lease activities, incorporating the Cartwright Act definitions by reference.

Expands Section 16727 to prohibit lease, rental, or sale of residential housing on conditions that restrict purchasers or tenants from dealing with competitors, where such action may substantially lessen competition or create undue concentration in residential housing markets.

Declares the act's purpose is to prevent market manipulation and investor speculation during the statewide housing emergency (in effect until January 1, 2030) and ensure housing development is responsive to resident needs rather than nonresident investor demands.