California Just Passed Four New ADU Laws.

🔹 The Four Bills
AB 462 – Coastal & Emergency Zones
ADUs in certain coastalor emergency-declared counties are now exempt from the Coastal Development Permit process.
✅ Faster approvals
✅ Lower risk for owners in affected zones
AB 1154 – Parking & JADU Updates
Local agencies can’t require parking for ADUs under 500 sq ft.
It also updates JADU rules:
Owner-occupancy may depend on shared vs. separate sanitation
Rentals must be 30 days+, preventing short-term Airbnb conversions
SB 9 – The Big One (Recap)
This earlier law still packs a punch: it allows two primary units per single-family lot and streamlines lot splits.
It’s the backbone of California’s infill housing movement.
SB 543 – Fee & Definition Refinements
Clarifies what counts as “interior livable space” for JADUs and tightens rules on impact fee exemptions for smaller units (≤ 750 sq ft).
Local agencies must keep their ADU/JADU ordinances compliant with state law.

🔍 Quick Takeaways
✅ Fewer permits required for ADUs in coastal/emergency zones
🚗 No parking requirements for units under 500 sq ft
💰 Fee exemptions and faster approvals for small ADUs
🏗 More flexibility under SB 9 for lot splits and duplex conversions

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