California’s 2026 legislative session brings sweeping changes to construction law. New statutes cap retention on private projects at 5% (SB 61), create a standardized change-order dispute process (SB 440), update home-improvement contract rules (SB 517, AB 1327), impose daily fines for missed balcony inspections (SB 721/AB 2579), overhaul the building code under Title 24, and expand transit-oriented housing (SB 79). This guide covers every major change, effective dates, and what property owners, contractors, and HOA boards should do now.

What California Construction Law Changes Take Effect in 2026?

The California Legislature passed more than a dozen bills affecting construction, real estate, and building safety during the 2024–2025 session. Several of these new laws took effect on January 1, 2026, with one major housing bill following on July 1, 2026.

Whether you are a general contractor, subcontractor, property owner, or HOA board member, these construction law changes affect your contracts, payment rights, inspection obligations, and development options. Below is a comprehensive guide to every significant new law.

Summary Table: All 2026 California Construction Law Changes

What Is the SB 61 Retention Cap on Private Construction Projects?

Senate Bill 61 adds Civil Code § 8811, capping retention on private construction projects at 5% of the contract price. Before this law, California had no statutory retention limit for private works—owners and general contractors routinely withheld 10% or more, creating significant cash-flow pressure on subcontractors and suppliers.

How Does SB 61 Work?

• Retention cap: No more than 5% of any progress payment may be withheld as retention.
• Not retroactive: SB 61 applies only to contracts entered into on or after January 1, 2026. Existing contracts remain under prior terms.
• Residential exception: Small residential projects involving buildings under four stories are exempt from the 5% cap.
• Practical impact: Contractors and subcontractors gain statutory leverage to negotiate lower retention, and owners must restructure payment schedules to comply.

If you are drafting or reviewing construction contracts for 2026 projects, confirm that retention provisions align with § 8811.

What Does SB 440 Change About Payment Disputes and Change Orders?

The Private Works Change Order Fair Payment Act (SB 440) fills a gap in California law by creating a standardized statutory process for claims and change-order disputes on large private construction projects. Previously, these disputes were governed almost entirely by contract terms, which often favored the party with greater bargaining power.

Key Provisions of SB 440

• 30-day response windows: Once a contractor submits a change-order claim, the project owner has 30 days to respond in writing. Silence is no longer a viable negotiation tactic.
• 2% monthly interest penalties: Undisputed amounts that remain unpaid accrue interest at 2% per month, incentivizing timely payment.
• Scope: Applies to large private projects (thresholds specified in the statute). Smaller residential projects may be excluded.
• Sunset clause: SB 440 sunsets on January 1, 2030. The Legislature will evaluate its impact before deciding whether to extend or make it permanent.

Contractors facing payment disputes now have a statutory framework to enforce prompt payment on private projects—similar to protections that have long existed for public works under the Prompt Payment Act.

How Do SB 517 and AB 1327 Change Home Improvement Contracts?

Two new laws modernize California’s home improvement contract requirements, giving homeowners greater transparency and flexibility.

SB 517: Subcontractor Disclosure Requirements

Under SB 517, home improvement contractors must disclose the name and contact information of any subcontractor who will perform more than 50% of the project cost. This requirement addresses a common consumer complaint: homeowners often do not know who is actually doing the work on their property until the project is underway.

AB 1327: Email Cancellation Rights

AB 1327 modernizes the home improvement contract cancellation process. Buyers can now cancel a home improvement contract within three business days via email, in addition to existing methods (mail and personal delivery). Contractors must update their cancellation-rights notices to reference the email option.

Together, these bills reflect the Legislature’s focus on consumer protection in the home improvement space. Contractors should review their standard contract templates and cancellation forms to verify compliance.

What Are the SB 721 and SB 326 Balcony Inspection Requirements?

California’s balcony inspection laws remain a major compliance issue heading into 2026. Two statutes govern exterior elevated element inspections, and the deadlines work differently for each.

SB 721: Apartment Building Inspections (Deadline: January 1, 2026)

SB 721 (Health & Safety Code §17973) requires owners of multifamily rental buildings with three or more units to inspect balconies, decks, walkways, and exterior stairs. The original deadline was January 1, 2025, but AB 2579 extended it to January 1, 2026. That deadline has now passed. Non-compliant property owners face daily fines of $100 to $500. For a detailed guide, see our companion post on SB 721 balcony inspections.

SB 326: Condo/HOA Inspections (Deadline: January 1, 2025)

SB 326 (Civil Code §5551) applies to condominium and common interest development associations. The deadline was January 1, 2025—and unlike SB 721, SB 326 received no extension. HOA boards that have not completed inspections face significant legal exposure. Read our full analysis of SB 326 for HOAs.

What Changes Does the 2025 Title 24 Building Standards Code Bring?

The 2025 edition of the California Building Standards Code (Title 24) takes effect on January 1, 2026. This triennial code cycle introduces several significant updates:

• New standalone Wildland-Urban Interface (WUI) Code: For the first time, California consolidates all WUI fire-hardening standards into a dedicated code chapter, making compliance more straightforward for projects in fire-prone areas.
• Updated Energy Code: Expanded electrification requirements, particularly for commercial and multifamily buildings. Heat-pump-ready infrastructure becomes the default in many building types.
• Electrification expansion: Additional building categories must install electric infrastructure or demonstrate equivalency with all-electric designs.
• Accessibility updates: Revised provisions for accessible design in commercial and multifamily construction, aligning with updated ADA and CBC standards.

What Is the AB 130 Building Code Freeze?

AB 130 freezes residential building code updates until 2031, meaning the 2025 Title 24 residential provisions will remain in effect without further tightening for approximately five years. The Legislature intended this freeze to provide cost certainty for homebuilders during a housing shortage. However, commercial and multifamily codes remain subject to the normal triennial update cycle.

How Does SB 79 Affect Housing Development Near Transit?

Senate Bill 79 creates the Transit-Oriented Housing Development program, effective July 1, 2026. The law overrides local zoning restrictions for qualifying housing projects located near major transit stations in eight Bay Area and Southern California counties.

What Does SB 79 Require?

• Location: Projects must be within a specified distance of qualifying transit stops.
• Override authority: SB 79 preempts local zoning on density, height, parking minimums, and use restrictions for eligible projects.
• Counties affected: Eight counties, primarily in the Bay Area and Southern California’s major metro areas.
• Affordable housing component: Qualifying projects must include a percentage of affordable units to access the zoning override.

Developers and property owners near transit should evaluate whether SB 79 unlocks development potential on parcels previously limited by local zoning.

What Are the New Stop-Work Rights Under Civil Code § 8850?

Civil Code § 8850 extends stop-work rights to private works projects. Previously, contractors’ rights to suspend work for nonpayment were codified only for public works under Public Contract Code § 9204. Now, contractors on private projects have a statutory basis to suspend performance when payment obligations are not met.

This change strengthens the position of contractors in payment disputes and provides a clearer framework for suspending work without breaching the contract. Contractors should document payment defaults carefully before exercising stop-work rights, as improper suspension could expose them to delay claims.

Need Help Navigating These Changes?

Bay Legal’s construction law attorneys help property owners, contractors, and HOA boards navigate California’s complex regulatory landscape. Schedule a consultation today to discuss how these changes affect your projects and legal obligations.

Call (650) 668-8000 or visit baylegal.com/practice-areas/construction-law/.

Frequently Asked Questions

Q: Does SB 61’s 5% retention cap apply to my existing contracts?

A: No. SB 61 is not retroactive. It applies only to construction contracts entered into on or after January 1, 2026. Contracts signed before that date remain governed by their existing retention terms.

Q: What happens if I missed the SB 721 balcony inspection deadline?

A: Property owners who missed the January 1, 2026, deadline face daily fines of $100 to $500 imposed by local enforcement agencies. You should schedule an inspection immediately and consult with a construction law attorney to address any compliance gaps and reduce your exposure.

Q: Does AB 2579 extend the SB 326 condo inspection deadline?

A: No. AB 2579 extended only the SB 721 deadline (apartment buildings) from January 1, 2025, to January 1, 2026. The SB 326 deadline for condominiums and HOAs remained January 1, 2025, with no extension.

Q: When does SB 440’s change-order process expire?

A: SB 440 includes a sunset clause and expires on January 1, 2030, unless the Legislature acts to extend or make it permanent before that date.

Q: Does AB 130 freeze all building codes until 2031?

A: No. AB 130 freezes only the residential portions of the building code. Commercial, multifamily, and other non-residential building codes continue on California’s standard triennial update cycle.

Disclaimer

This content is for informational purposes only and does not constitute legal advice. Results depend on the specific facts of each situation. No attorney-client relationship is created by reading this article. Contact Bay Legal, PC for advice on your specific situation.

Responsible attorney: Bay Legal, PC | (650) 668-8000 | baylegal.com