California Attorney General Rob Bonta is wading into a dispute between the developer of an affordable housing project and the city of Del Mar.

On Friday, the AG's office sent a warning letter saying Del Mar could face penalties in the new year over its determination that the application for the Seaside Ridge development is incomplete.

goes into effect on Jan. 1. Among other things, it gives developers more powers to sue cities and agencies for violating housing reform laws.

"Lowering the cost of rent and homeownership for Californians has been a top priority for Attorney General Bonta since taking office, and he is committed to ensuring that cities and counties comply with state housing laws to get us there," a spokesperson for the AG's office said in a statement to KPBS. AG letter to

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