CA AB678

Changes the standard of proof for local agency findings regarding housing development disapprovals from "substantial evidence" to "preponderance of the evidence."

Prohibits local agencies from using changes to zoning ordinances or general plan designations made after an application is deemed complete as a basis to disapprove or condition housing development projects.

Redefines mixed-use housing developments to require at least 2/3 of square footage be designated for residential use, rather than limiting nonresidential uses to neighborhood commercial uses on first floors.

Requires local agencies to provide written documentation within 30-60 days explaining why a housing project is inconsistent with local plans or standards; failure to provide documentation deems the project consistent and compliant.

Establishes mandatory minimum fines of $10,000 per housing unit when courts find local agencies violated the act and failed to comply with court orders within 60 days; multiplies fines by 5 for bad faith violations.