ADU Construction in Los Angeles in Mar Vista
Serving 90066 and Venice, Palms, Culver City
California's ADU laws have made backyard units one of the highest-leverage property improvements an LA homeowner can make. We design and build all three types — detached new builds, attached additions, and JADUs (Junior ADUs converted from existing space). End to end. Permits, plans, foundations, framing, finishes, and final inspections, all under one roof. You work directly with Onn from feasibility study through certificate of occupancy.
ADU Construction in Los Angeles specifically for Mar Vista
Every neighborhood has its own architectural character, permit jurisdiction, and finish-level expectations. Here's how we approach adu construction in los angeles in Mar Vista specifically.
Mid-century home stock
Mar Vista homes are predominantly 1945–1965 builds. Original electrical service is often 100-amp and needs upgrade. Galvanized supply pipes are common. Single-pane windows, knob-and-tube wiring sometimes lurking. We plan for these during any kitchen or bath remodel.
ADU opportunities
Many Mar Vista lots are 50'×140' or larger — good fits for detached ADUs of 800–1,200 sq ft. Conversion of 1-car garages to JADUs is also common. State ADU laws strongly support these projects in Mar Vista.
Neighborhood character
Mar Vista has an active community council and many homeowners value preserving mid-century character. We design remodels that respect this — modern function, period-appropriate aesthetic.
What we handle
Feasibility & site planning
Lot review, setbacks, height limits, utility access, soil assessment. We tell you up front whether your project pencils — square footage, code constraints, expected timeline.
Architectural design
Floor plans, elevations, 3D renderings. We design to maximize functional space within California's ADU size limits (up to 1,200 sq ft detached, 850 sq ft for studios/1-bedroom).
Permits & utilities
Plan check submission, energy compliance (Title 24), structural engineering, separate or shared utility service. We deal with LADBS or your municipal building department.
Foundation, framing, finish
New foundations or attached construction, framing, MEP rough-in, exterior, and full interior finishes — kitchen, bath, flooring, HVAC, electrical.
Final inspection & C of O
Final inspections, Certificate of Occupancy, and walkthrough. We hand you a unit you can live in, rent, or use as a guest house.
Pricing in Mar Vista
Typical detached ADU build cost in Los Angeles, all-in (design, permits, construction, finishes, utility hookups). Attached ADUs typically run lower; JADUs converting existing space lower still.
LADBS handles Mar Vista permits. Standard plan check timelines (4–10 weeks) for kitchens. ADU projects benefit from state-level ministerial approval where applicable.
Frequently asked
How big can my ADU be in Los Angeles? +
California state law allows detached ADUs up to 1,200 sq ft (or larger if your local jurisdiction permits). Attached ADUs are limited to 50% of the primary home's square footage or 1,200 sq ft, whichever is less. Junior ADUs (JADUs) are capped at 500 sq ft and must be inside the existing primary structure.
How long does an ADU project take? +
Plan to design and build a detached ADU in 9–14 months total: 2–3 months for design and permits, 6–10 months for construction. Attached ADUs and JADU conversions can run shorter.
Older home surprises — how often do they come up? +
In Mar Vista, frequently. Most pre-1970s homes here have at least one of: knob-and-tube wiring, galvanized pipes, or asbestos floor tile under the linoleum. We test for hazardous materials before demo and budget contingency.
Can I add an ADU on my Mar Vista lot? +
In most cases, yes. We do a feasibility check up front — setbacks, height limits, utility access, soil. We tell you whether a detached ADU pencils or whether a JADU conversion makes more sense.
From the blog
ADU vs Garage Conversion: Which Makes Sense for Your LA Property?
A clear-eyed comparison of detached ADUs, attached ADUs, JADUs, and garage conversions for LA homeowners — costs, timelines, ROI, and which one fits your lot.
LA County Kitchen Permits Explained (2026 Edition)
When you actually need a permit for a kitchen remodel in Los Angeles, how the plan-check process works, typical timelines for LADBS and surrounding cities, and how to avoid the common mistakes.
ADU Construction in Los Angeles in other neighborhoods
Live in Mar Vista?
Onn personally reviews every inquiry. Tell us about your project — Onn will be in touch within one business day.