Detached new build ADUs, attached ADUs, garage conversions, and junior ADUs designed and built in house.
Get a free in home consultation in Malibu. Call 310-596-5000 or use the form below.
ADU work and garage conversions in Malibu operate under state conforming rules as integrated into the certified Local Coastal Program, with a Coastal Development Permit applying on top of the ADU permit for most parcels. Paradigm Builders, CSLB 1100775, designs Malibu ADUs and garage conversions through the City of Malibu Planning Department and Building Safety at 23825 Stuart Ranch Road. The entire city is in the California Coastal Zone, and the LCP supersedes city zoning when in conflict. Most lots are on septic, which means an advanced Onsite Wastewater Treatment System upgrade is often part of an ADU scope that adds a full kitchen, bath, and laundry. Very High Fire Hazard Severity Zone rules require Chapter 7A ignition resistant materials on exterior assemblies, which influences siding, eave, vent, and window selection. Saltwater corrosion shapes plumbing material choice. Architectural styles across the city span Cape Cod, Mediterranean, contemporary modern, Spanish Colonial Revival, and ranch, and each one carries an ADU vocabulary that fits the coastal setting. From 1800 Century Park East Suite 600 in Los Angeles our team coordinates the CDP process, septic work, and field execution. Call 310 596 5000 to begin a Malibu ADU consultation.
ADU & Garage Conversion Scope in Malibu
- Detached new build ADUs (up to 1,200 sf state default, taller and larger near transit)
- Garage conversion ADUs (existing footprint, ministerial approval pathway)
- Attached ADUs (sharing one wall with the main house)
- Junior ADUs (up to 500 sf inside the main house)
- Site planning, utility separation, and meter coordination
- Foundation and grading, especially for hillside ADU sites
- Title 24 energy compliance, low rise multifamily energy code
- Solar PV (required on most new construction ADUs in California)
Our ADU & Garage Conversion Process
Every Malibu ADU or garage conversion runs through the same end to end process. Design, permits, and construction under one roof.
We walk the Malibu lot to confirm setbacks, lot coverage remaining, slope, sewer capacity, electrical service capacity, and any easement constraints. Some lots can take a full 1,200 sf detached unit; some can only take a JADU.
Floor plan, elevations, and 3D renderings. Roof type, window placement, exterior finish, kitchen layout, and bathroom location are all decided before plans are submitted.
Title 24 calcs, low rise multifamily energy code, solar PV sizing, ventilation, and insulation specs are run before permit submittal. Avoids most corrections from plan check.
Line by line proposal covering site work, foundation, framing, MEP, finishes, solar, and utility tie in. We list which fees are city pass through (school impact, sewer cap charge) and which are construction.
City of Malibu Planning Dept and Building Safety ADU submittal. State conforming as integrated into the LCP.
Site clearance, foundation, framing, MEP, exterior dry in, interior finish, fixtures, final inspection. Most ADU builds run on a 4 to 7 month construction window.
Final inspections, panel upgrade if required, meter separation if you chose that path, and certificate of occupancy.
What a ADU & Garage Project Looks Like in Malibu
Malibu ADUs and garage conversions are uniquely shaped by the California Coastal Zone framework, septic capacity, fire hazard severity, and the coastal environment. The CDP applies on top of the ADU permit for most parcels, which means a Malibu ADU schedule absorbs Coastal Development Permit review on top of standard building permit work. Most lots are on septic, so an ADU that adds a full kitchen, bath, and laundry often requires advanced OWTS engineering before construction can begin. The Very High Fire Hazard Severity Zone requires Chapter 7A ignition resistant materials on exterior assemblies. Saltwater corrosion influences material selection on plumbing, fittings, exterior penetrations, and hardware. Long material haul distances from the 101 or PCH influence delivery and crane logistics. The architectural language across Cape Cod, Mediterranean, contemporary modern, Spanish Colonial Revival, and ranch shapes how the ADU exterior is detailed against the main residence and the coastal setting.
ADU & Garage Conversion Permits in Malibu
ADU work in Malibu follows California state ministerial approval rules with city specific layers on top. Here is the path your project follows.
Where the permits go. ADU submittals in Malibu are processed by City of Malibu Planning Dept and Building Safety, 23825 Stuart Ranch Rd under California state ministerial timelines.
ADU and accessory unit rules. State conforming as integrated into the LCP. CDP applies on top of ADU permit for most parcels.
Code specifics. 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.
ADU & Garage Conversion Cost in Malibu
Malibu ADU and garage conversion pricing typically depends on the depth of Coastal Development Permit work, whether septic capacity requires an advanced OWTS upgrade, the Chapter 7A ignition resistant assemblies required in the Very High Fire Hazard Severity Zone, and the corrosion appropriate specifications throughout. Costs also depend on architectural matching against the main residence and the coastal setting. Long haul distances from the 101 or PCH influence logistics cost. Paradigm Builders builds line item budgets after site review.
Common Questions: ADU & Garage Conversion in Malibu
Can I build an ADU on my Malibu lot?
Most likely yes. California state law allows at least one ADU plus one JADU on virtually every single family lot. Malibu layers local rules on top. We walk the lot before any design work to confirm setbacks, lot coverage, and any overlay constraints.
How long does an ADU take to build in Malibu?
Permit timeline runs 60 to 120 days under California state ministerial approval, plus a 4 to 7 month construction window. From signed design contract to final inspection most Malibu ADUs run 8 to 14 months total.
Will my property taxes go up?
Yes, but only on the assessed value of the new ADU. The existing house keeps its current assessment under Prop 13. The ADU is valued at construction cost basis.
Do I need to live in the main house if I rent the ADU?
California removed the owner occupancy requirement for most ADUs through Dec 31, 2024 then reinstated it with exceptions starting 2025. Junior ADUs still require owner occupancy in the main house or the JADU. We confirm current rules at the feasibility walk.
Can I convert my detached garage instead of building new?
Yes. Garage conversions to ADUs are a ministerial process under state law and are usually the lowest cost ADU path. The slab, walls, and roof are existing, which cuts site work and framing scope significantly.
Do you handle the solar requirement?
Yes. New construction ADUs over 80 percent new floor area trigger the solar mandate. We size and install the PV system as part of the build. Garage conversions are usually exempt.
Nearby Cities We Serve
Paradigm Builders works throughout the greater Los Angeles area. ADU & Garage Conversion pages for nearby cities:
Ready to Build an ADU in Malibu?
Send your ADU project details below. We confirm site feasibility, walk the lot, and follow up with a unit plan, scope estimate, and ADU permit timeline for your Malibu property.
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Or call 310-596-5000
Paradigm Builders
1800 Century Park East Suite 600
Los Angeles, CA 90067
Phone: 310-596-5000
Email: info@paradigmbuilders.com
California Contractors State License Board: License 1100775
Serving Malibu and the greater Los Angeles metro area.
