California Permit & Code Enforcement Laws: 2026 Update

7 min read · Last reviewed April 2026

SB 37 — Attorney Advertising Transparency

Effective January 1, 2026, California SB 37 requires attorney-operated websites to clearly identify the responsible attorney, their bar number, and office location. This law increases transparency for consumers seeking legal help for permit violations and other legal issues.

ADU Permit Streamlining

California continues to expand ADU permitting reform. Recent legislation has further streamlined the process for legalizing existing unpermitted ADUs, reduced fees for after-the-fact ADU permits in many jurisdictions, and limited the ability of local agencies to deny ADU permits that meet state standards.

Code Enforcement Modernization

Several California cities have updated their code enforcement processes to include online complaint filing, digital violation tracking, and streamlined compliance timelines. These changes make it easier for property owners to respond to violations — but also make enforcement more efficient.

Building Code Updates

The 2025 California Building Code (effective January 1, 2026) includes updated energy efficiency standards, seismic requirements, and fire safety provisions. Work permitted under previous code versions may need to meet updated standards if retroactive permits are sought.

Impact on Property Owners

These changes create both opportunities and obligations for California property owners dealing with permit violations. The ADU amnesty provisions may make it easier and cheaper to legalize unpermitted units. However, updated code requirements may increase the cost of corrections for work that doesn't meet current standards.