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SB 358

Mitigation Fee Act: mitigating vehicular traffic impacts.

2025-2026 Regular Session Introduced by Josh Becker

SB 358 redefines how California developers must calculate and pay fees to mitigate vehicular traffic impacts from new construction projects.

Chaptered by Secretary of State. Chapter 515, Statutes of 2025.
#mitigationfeeact #mitigatingvehiculartrafficimpacts
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Bill Summary · SB 358

Legislative bill overview

SB 358 modifies California's mitigation fee framework to address vehicular traffic impacts from new development projects. The law establishes or adjusts requirements for how developers must calculate and pay fees intended to offset increased traffic congestion caused by their projects.

Why is this important

Traffic mitigation fees are a primary mechanism California uses to fund infrastructure improvements needed to handle growth. How these fees are calculated directly affects development costs, housing affordability, and the adequacy of transportation funding—making this relevant to builders, municipalities, and residents statewide.

Potential points of contention

  • Development cost impacts: Stricter or higher mitigation fees increase project costs, potentially raising housing prices and reducing development in some areas
  • Fee calculation methodology: Disagreement likely exists over what traffic impacts should be counted and how baseline conditions should be established, affecting fairness across different project types
  • Infrastructure funding adequacy: Opponents may argue fees are insufficient to truly address traffic problems, while supporters contend they shouldn't be so high they stall needed housing development

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

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