California ADU Laws Explained (2025 Update)

Thinking about building an ADU in California? Staying current on the latest ADU laws and regulations is critical. In 2025, updates continue to make it easier for homeowners in San Diego to add ADUs legally and efficiently.

At Fabrick Construction, we simplify the rules into plain English so you can plan your project with confidence.

Key California ADU Law Updates in 2025

• Ministerial Approval: Cities must approve ADU applications within a defined timeline, typically 60 days or less.
• Reduced Setbacks: Side and rear setbacks as little as 4 feet are allowed in most cases.
• Height Flexibility: Detached ADUs up to 16 feet tall (and in some cases 18–20 feet) are permitted, even in single-family zones.
• Parking Exemptions: If your home is near public transit, no extra parking is required for your ADU.
• Owner-Occupancy: California continues to allow ADUs without strict owner-occupancy requirements, making rentals easier.
• JADUs (Junior ADUs): A single-family home can often add both an ADU and a JADU, maximizing property value.

What This Means for San Diego Homeowners

These updates make ADUs more accessible than ever. For families in North Park, Mission Hills, and Oceanside, this means:

• Fewer zoning hurdles
• Faster approvals
• More design flexibility
• Greater opportunities for rental income

Why Work With Fabrick

Navigating ADU regulations can be overwhelming. Our team has built ADUs across San Diego County and knows how to translate California law into practical building strategies.

We help you with:

• We guide you in getting feasibility studies, provide expert input to ensure your design and decisions are aligned with your goals.
• Review your initial proposed floor plans to value-engineer the best project for your unique situation and budget.
• Streamlined project management to save time and stress

Your Next Step

Don’t let confusing regulations slow you down. Whether you’re in La Jolla, Carlsbad, Encinitas, or anywhere in San Diego County, Fabrick will guide you through California’s ADU laws and deliver a project that meets both legal and lifestyle needs.

👉 Book your free ADU consultation today and get clarity on how the 2025 California ADU laws apply to your property.

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