To comply with the significant 2026 California construction law changes, specifically SB 440, contractors should proactively update their contract templates and operational procedures. Key updates include:

• Update Retention Clauses: For private works, the amount a project owner can withhold is now capped at 5% of the contract price under Civil Code Section 8811. Contracts must reflect this 5% cap and should include an exception clause for unbonded subcontractors, who may be subject to different requirements.
• Include Mandatory Mediation: Before filing a lawsuit over a private project dispute, parties must now participate in mediation. Contracts should specify the timeline for initiating mediation and the process for selecting a neutral mediator.
• Integrate Prompt Pay Language: Contracts should explicitly state the legal obligation for timely payment. This includes the new statutory 2% monthly interest penalty on late payments for private works claims.
• Formalize Change Order Procedures: Adopt a rigorous documentation process where written approval is required before any extra work begins. The change order form should include a detailed scope description, cost breakdowns, schedule impact, and signature lines for both parties.
• Align Invoicing with Response Timelines: The law now mandates a 15-day timeline for owners to respond to payment claims. Contractors should structure their invoicing and notice procedures to leverage these compressed timelines and the associated late-payment penalties.

• California Construction Law Updates 2026: Key Changes