ADU Construction in Los Angeles
Garage conversions and new accessory dwelling units — rental income, a home office, or space for family. We handle design, permits and construction end to end.
What We Build
ADU Types & Services
California's ADU laws make this the best time in decades to add a unit to your property — and the permitting is our job, not yours.
Garage Conversions
- Convert an existing garage into a legal living unit
- The most cost-effective path to an ADU
- Insulation, plumbing, electrical and kitchen build-out
- Typically 3–4 months of construction
Detached & Attached ADUs
- New construction designed for your lot
- Studio to 2-bedroom layouts
- Full kitchens and laundry
Everything Handled
- Feasibility check for your property
- Architectural plans and engineering
- City permits, corrections and inspections
- Utility connections and separate metering options
- Finishes to the same standard as our remodels
How It Works
Our Process
Feasibility & Estimate
We assess your lot, garage or yard, explain what's possible and provide a written estimate — free.
Design & Plans
Architectural plans and engineering tailored to your property and budget.
Permits
We submit, track and clear city corrections until your permit is approved.
Construction
Foundation to final inspection — one team, one point of contact, weekly updates.
★★★★★
“From planning and permits to the final finishes, their team handled everything professionally and efficiently… They stayed on schedule, communicated clearly, and made the whole process stress-free.”Chris M.ADU Construction · Google
Questions
ADU FAQ
How much does an ADU cost to build in Los Angeles?
Garage conversions usually run between $130,000 and $220,000, because the structure already exists. Detached new-construction ADUs usually run between $275,000 and $450,000 and offer full design freedom. Size, utility upgrades and finish level move the number most. After seeing your property we give you a free written estimate broken down line by line.
Do I need a permit to build an ADU?
Yes — every ADU requires city approval, but California law now requires cities to streamline ADU permitting. We handle the full process: plans, submittals, corrections and inspections, so your unit is fully legal and rentable.
How long does an ADU take to build?
Garage conversions typically take 3–4 months from permit approval; detached ADUs 5–8 months. Permitting before construction usually adds 2–4 months depending on the city.
Can I rent out my ADU?
Yes — in California, permitted ADUs can legally be rented (long-term rental rules vary by city for short-term stays). Many of our clients cover a significant part of their mortgage with ADU rental income.
Is your work guaranteed?
Yes. Every ARKO project comes with a 5-year warranty on our workmanship, and most of the work is done by our own crews rather than subcontractors.
Wondering what your property allows?
Free feasibility consultation. Serving Los Angeles, Calabasas, Agoura Hills, Thousand Oaks & nearby.