ADU Rules in Malibu.
Local ADU regulations, permit fees, setback requirements, and typical timelines for Malibu. Last updated 2026-05-27.
Malibu ADU Requirements
Height may be further restricted in Coastal Zone by view corridor protections.
Malibu has no transit proximity exemptions; parking replacement generally required.
Coastal Development Permit adds significant review time and fees. Septic system upgrades may be required.
Design 6 weeks · Permit 16 weeks · Build 44 weeks
Plain-language summary
In Malibu, a detached ADU requires a minimum 4-foot side setback and 4-foot rear setback. The maximum height for a detached ADU is 16 feet, while an attached ADU may be up to 25 feet. The maximum size for a detached ADU is 1,200 sq ft; a Junior ADU (JADU) is limited to 500 sq ft. Replacement parking is required for most projects. Typical permit fees range from $15,000 to $35,000. A typical project takes approximately ~15 months from design start to move-in, including 6 weeks of design, 16 weeks for permit review, and 44 weeks of construction.
⚠️ ADU rules change frequently. Always verify current requirements with the Malibu Building & Safety Department before submitting plans. Official source →
What to Watch Out For
- Virtually all of Malibu is in the California Coastal Zone — a Coastal Development Permit (CDP) from the California Coastal Commission is required before construction.
- Septic systems serve most of Malibu; ADUs typically require a septic expansion or new system (costly).
- VHFHSZ: the entire city is in a Very High Fire Hazard Severity Zone. Class A roofing, ember-resistant vents, and 100-ft defensible space are mandatory.
- Biological resources, ESHA (Environmentally Sensitive Habitat Area), and bluff-top setbacks may further restrict buildable area.
How Long Does It Take to Get an ADU Permit in Malibu?
Site study, floor plans, elevations, structural drawings.
Plan check, corrections, and permit issuance by Malibu Building & Safety.
Foundation, framing, MEP rough-in, finishes, final inspection.
A licensed engineer on your lot, free.
30 minutes. We walk the property, figure out what's feasible, and answer any questions you have.
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