California's Toxic Mold Protection Act (Health & Safety Code §26100 et seq.) and Civil Code §1941.7 require landlords to disclose known visible mold exceeding permissible exposure limits before lease signing. Concord has no supplemental mold ordinance, but visible mold is treated as a substandard housing condition under Health & Safety Code §17920.3 and enforced by Concord Code Enforcement as a habitability violation.
Under California Civil Code §1941.7 and the Toxic Mold Protection Act (Health & Safety Code §26100–26156), landlords must provide written disclosure to prospective tenants if they know, or have reasonable cause to believe, that mold exceeds permissible exposure limits or poses a health threat. California Health & Safety Code §17920.3 classifies visible mold growth (except that found on food, inside refrigerators, or on surfaces designed for mold growth such as compost bins) as a substandard condition making a unit untenantable. Landlords must remediate documented mold and fix the underlying moisture source. Tenants may invoke the implied warranty of habitability (Green v. Superior Court, 10 Cal.3d 616) and pursue repair-and-deduct (Civil Code §1942), rent withholding, or tort remedies. Concord Code Enforcement investigates mold complaints under Concord Municipal Code Title 8 and may issue notices to abate under state housing code. There is no state-licensed mold assessor requirement in California, but the Department of Industrial Relations publishes mold assessment guidance. Concord does not require proactive mold inspections but responds to tenant complaints.
Contact your local code enforcement office for specific penalty information.
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Side-by-side rule comparisons with other cities in Contra Costa County.
See how other cities in Contra Costa County handle mold disclosure.
See how Concord's mold disclosure rules stack up against other locations.
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