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AB 738

Energy: building standards: photovoltaic requirements.

2025-2026 Regular Session Introduced by Joe Patterson and 1 co-sponsor

California bill to expand mandatory rooftop solar requirements in building codes vetoed by Governor despite Senate passage; reconsideration pending.

Consideration of Governor's veto stricken from file.
#energy #buildingstandards #photovoltaicrequirements
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Bill Summary · AB 738

Legislative bill overview

AB 738 would have modified California's building standards to expand or strengthen photovoltaic (solar panel) installation requirements for new construction or building modifications. The bill passed the Senate with strong bipartisan support (34-3) but was vetoed by the Governor in October 2025, with a veto reconsideration still pending.

Why is this important

California has been a leader in solar energy mandates through Title 24 building standards, which currently require rooftop solar on most new residential construction. Any changes to these requirements affect housing costs, renewable energy adoption rates, and the state's climate goals—impacting both developers and homeowners across the state.

Potential points of contention

  • Housing affordability: Expanded solar requirements could increase construction costs, potentially raising home prices in an already expensive market
  • Flexibility vs. mandate: Debate over whether solar should be mandatory or optional with cost-offset incentives
  • Technical feasibility: Questions about whether all buildings (shaded properties, certain roof types) can practically accommodate solar systems
  • Governor's rationale: The veto suggests concerns about scope, implementation, or economic impact that differ from legislative intent

Compiled from official sources — confirm details with the bill’s official record.

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