California state law has opened the door for most Marina Del Rey 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. Marina Del Rey 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 Marina Del Rey
ADU submittals are ministerial in California, meaning the city reviews them administratively without discretionary review. Los Angeles County Department of Public Works (building) and LA County Department of Regional Planning (planning). Marina del Rey is unincorporated county land managed in part by Beaches & Harbors. typically completes plan check in 60 to 120 days. Marina del Rey Specific Plan (LA County Code Chapter 22.46) governs development, including coastal specific design and view corridor rules. Different from City of LA codes. 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 Marina Del Rey 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 Marina Del Rey
State conforming under LA County code. Detached ADUs up to 1,200 sf, 16 ft tall (18 ft within half a mile of major transit or on multifamily lots). Standard 4 ft side and rear setbacks.
How Paradigm Builders Can Help in Marina Del Rey
Paradigm Builders runs design, permits, and construction across the full residential scope in Marina Del Rey. Browse our service pages for what fits your project:
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