California state law has opened the door for most Malibu homeowners to add an Accessory Dwelling Unit (ADU) on their lot. This guide covers the rules, the design choices, and the build process.
State law vs local rules
California Government Code 65852.2 (the state ADU law) sets a floor: every single family lot can have at least one ADU plus one Junior ADU. Cities can add layers on top but cannot block ADUs entirely. Malibu has its own ordinance that further shapes setbacks, height, and lot coverage.
Site feasibility
Before design, walk the lot for setbacks, sewer capacity, electrical service capacity, slope, and easement constraints. Detached new build ADUs need a footprint and yard space. Garage conversions reuse an existing structure. Junior ADUs sit inside the main house. Each path has its own cost basis and construction timeline.
Permits in Malibu
ADU submittals are ministerial in California, meaning the city reviews them administratively without discretionary review. City of Malibu Planning Dept and Building Safety, 23825 Stuart Ranch Rd. Development portal at mlb pptsrv.ci.malibu.ca.us. typically completes plan check in 60 to 120 days. Most lots are on septic; advanced Onsite Wastewater Treatment Systems (OWTS) required for new builds and many remodels, costing in the six figures before any structural work. Many beach fronting lots also need seawall scope coordinated with foundation work. Garage conversions usually clear faster than detached new builds.
Construction window
Site clearance, foundation, framing, MEP rough, exterior dry in, interior finish, fixture install, final inspection. ADU builds in Malibu typically run 4 to 7 months of construction. From signed design contract to final inspection most projects total 8 to 14 months.
ADU rules specific to Malibu
State conforming as integrated into the LCP. CDP applies on top of ADU permit for most parcels.
How Paradigm Builders Can Help in Malibu
Paradigm Builders runs design, permits, and construction across the full residential scope in Malibu. Browse our service pages for what fits your project:
Ready to Talk About Your Malibu Project?
Free in home consultation. Tell us about your project and we will follow up with a line by line estimate.
Or call 310-596-5000
